Top 12 Dutch Growth, Sales, and Lead Gen Agencies To Run Your Business Growth in The Netherlands

If you're running a B2B company in the Netherlands and you're reading this, chances are your pipeline isn't where you need it to be. Your sales team is either non-existent or spending too much time prospecting and not enough time closing.

Maybe you've tried cold email outreach in-house but the results were mediocre, your emails are landing in spam, and your reps are frustrated.

Or maybe you're simply looking for a partner who understands the Dutch market, speaks the language, and can help you fill your calendar with qualified meetings.

The Netherlands is a competitive B2B market. With Amsterdam, Rotterdam, Utrecht, and Eindhoven all hosting dense clusters of SaaS, tech, consultancy, and professional services companies, standing out and getting the attention of decision-makers takes real strategy.

Generic cold emails and spray-and-pray LinkedIn messages don't cut it anymore. Dutch buyers are direct, well-informed, and they expect relevance.

That's exactly why more and more Dutch companies are turning to specialized agencies. The right agency should help you define who to target, when to target them, what to say, and how to turn conversations into revenue.

There's a bigger thing worth flagging before we get into the list. Most agencies in this category sell themselves as "sales agencies" or "lead generation agencies." What actually moves pipeline for a Dutch B2B company in 2026 is broader than that.

We see growth as a connected revenue system where outbound, inbound, intent capture, and CRM run as one motion that keeps producing after the campaign ends.

That's the frame we use to evaluate every agency on this list, including ours. Calling that work GTM agency work isn’t semantic. It changes which agencies actually solve the problem.

We put together this list to help you find the right partner for your growth needs. And yes, we're including ourselves first, because we genuinely believe we've built the best agency in the Netherlands to hire for B2B growth, not just the best at one slice of the funnel.

But we'll let you decide after you see what we bring to the table.

So let's get started.

Who we are at Nebor.ai and why we're the best agency in the Netherlands to hire for B2B growth

Nebor.ai is a B2B growth agency headquartered in Amsterdam. We are Andrew van Rossenberg and Yannick Kok, and our team works with B2B companies across the Netherlands (and globally) to build the GTM systems that turn pipeline from a constant scramble into a predictable, compounding motion.

We cover the full revenue motion.

Outbound that runs without your reps touching a list, inbound capture and qualification that turns warm signals into booked meetings, demand generation and ABM workflows that build awareness in the right accounts, and RevOps work that keeps your CRM clean, your data trustworthy, and your team aligned. All without the manual grind your team is doing today.

Let's walk through why we're different from every other agency on this list and why working with us is the best move for your Dutch B2B business.

We're salespeople first, automation experts second

Here's something that separates us from most agencies in the Dutch market. We didn't come from a marketing or automation background. We came from sales.

Andrew worked at a string of sales agencies in Amsterdam before joining Gartner, one of the biggest names in research and advisory globally.

Yannick spent more than a decade in corporate SaaS sales at companies like Mapiq and OneStream, then ran his own consultancy designing Clay-based GTM workflows for startup founders before joining Nebor as a partner.

Funny enough, we kept seeing the same sales issues across the industry, in scrappy startups and at companies like Gartner. Reps were manually hunting for prospects, tracking buying signals by hand, relying on free Lusha accounts with limited credits.

We saw founders begging former territory managers for prospect lists just to have someone to call. Email follow-ups required manual tracking and follow-through.

This is the reality at most B2B companies today, and it's the reality that most agencies don't fix. Most agencies in the Dutch market are run either by cold emailers who chase volume and quick wins, or by automators who know the tools but have never carried a quota or sat in a discovery call.

They lack the sales instinct to know what makes a prospect tick and what actually moves deals forward.

We bring both. We understand sales from the inside out, and we pair that experience with modern automation and AI. The output is the right kind of leads showing up in front of your closers, with messaging that resonates and timing that actually lands.

We build the GTM infrastructure your revenue team actually needs

Almost every revenue team we know hates prospecting. It's time-consuming, repetitive, doesn't count against quota, and it pulls your best closers away from what they do best, closing deals.

But prospecting is just one piece of the broader problem we solve.

Nebor builds the full GTM infrastructure for your revenue team.

That includes defining your ideal customer profile (ICP) and total addressable market, building targeted prospect lists, enriching data, crafting personalized messaging, setting up email infrastructure, warming domains, and running multi-channel outreach across email and LinkedIn.

It also covers inbound capture, qualification, and routing, demand generation work that warms target accounts before outbound hits, and the RevOps layer that keeps everything connected.

Your reps don't touch any of the manual work until a qualified prospect is ready for a conversation. Your team gets meetings booked directly into their calendars and they show up ready to sell.

We set this all up using Clay at the center, integrated with tools like Instantly, PhantomBuster, Apify, and various data enrichment platforms. Everything runs on autopilot once it's live, and what we build stays inside your stack for your team to keep operating after the engagement ends.

We connect inbound, outbound, and intent signals into one revenue system

One of the biggest problems we see with Dutch B2B companies is that inbound and outbound live in completely separate worlds. Your marketing team runs ads, publishes content, gets website visitors, maybe some form fills. Then what?

Those inbound signals often sit untouched in your CRM or get handed off to sales with zero context.

We connect inbound, outbound, and intent monitoring into one unified system. When someone visits your sales pages, downloads a whitepaper, engages with your LinkedIn posts, or fills out a form, that signal gets captured and fed into our automation workflows.

We can instantly identify who they are, enrich their profile, score them against your ICP, and trigger personalized outreach before they go cold. The result is that your inbound traffic turns into real conversations instead of MQLs that die in a spreadsheet. This is what we call inbound-led outbound, and it's the highest-converting motion we run for clients.

The automated workflows we build for your revenue team and what each one does for you

This is where things get really interesting. We engineer the systems behind every campaign we run. Each workflow is designed around a specific trigger or data source, and together they create a revenue engine that runs on its own.

Here's what that looks like.

Intent data workflow

This is the backbone of what we do. Instead of relying on generic intent data from tools like Cognism or Bombora (which mostly track article views and IP clicks), we focus on real business signals that indicate a company is actually entering a buying window.

Think hiring signals, funding rounds, leadership changes, new office openings, and tech stack changes. We set up systems that monitor these signals in real-time, push them into Clay, enrich the data, and trigger personalized outreach automatically.

When a company starts hiring for SDR roles, for example, that tells us they're investing in sales growth and that the kind of GTM system we build might be exactly what they need. So we reach out with the right pitch at the right moment.

RSS feeds workflow

This one is powerful for companies whose prospects are tied to industry-specific news or events. We set up RSS feed monitors that automatically scrape new publications from relevant industry sites, news outlets, and blogs.

Every time a new article gets published, it's pushed into Clay. Our workflow then analyzes the content through prompts to Claygent (for example, an announcement about a new property development project if your client sells furnishing solutions) and identifies the right decision-makers at the companies mentioned.

The whole thing runs on autopilot and you get a first-mover advantage because you're reaching out to prospects within hours of a relevant event, well before any competitor even notices.

We covered the full build for this kind of motion in our signal-based outbound campaigns post.

Manual input workflow

Not everything can or should be automated. Sometimes your sales rep spots a hot account at a conference, gets a referral, or finds an opportunity through their own network.

The manual input workflow gives them a simple way to drop those prospects into the system and let automation take over from there. They enter the company or contact, and our Clay workflow handles enrichment, qualification, sequencing, and follow-up.

It's the best of both worlds, human judgment plus machine execution.

Inbound meeting workflow

When an inbound lead books a meeting through your website, what happens next matters a lot. Our inbound meeting workflow automatically enriches that lead the moment they book, pulling in company data, tech stack, recent funding, hiring activity, and more.

By the time your rep gets on the call, they're walking in with full context instead of scrambling to research who they're talking to. And if the lead doesn't show up, automated follow-up sequences kick in to reschedule.

Former customer or contact re-engagement workflow

Your CRM is sitting on a goldmine of former customers, closed-lost deals, and old contacts that nobody is reaching out to.

Our re-engagement workflow identifies these contacts, checks for new buying signals like a job change, a new company, or a recent round of funding, and triggers a personalized outreach sequence.

It's low-hanging fruit that most companies completely ignore, and it often produces some of the highest-converting conversations.

Free trial monitoring workflow

If your business runs a free trial or freemium model, you know that not every trial user is created equal.

This workflow analyzes trial signups and cross-references them with firmographic and behavioral data to identify which trials have the highest likelihood of converting to paid customers.

That way, your sales team doesn't spend equal time on every trial. They focus their energy on the high-value accounts that are most likely to close, and they reach out at just the right moment with a message that feels helpful, not pushy.

Other custom workflows

Every business is unique, and so are the sales triggers that matter most to you. We've built custom workflows for monitoring competitor churn signals, tracking new job postings in specific departments, identifying companies using certain tech stacks, following regulatory changes that create buying urgency, and more.

If there's a data point out there that indicates your prospect will be ready to buy, we can build a workflow around it.

We turn your CRM from a data graveyard into the command center for your revenue team

All of these workflows tie back to one central system, and that system feeds directly into your CRM. Over time, your CRM stops being a messy database of stale contacts and incomplete records and becomes the operational backbone your revenue team actually relies on.

We eliminate duplicate records, fill in missing data, tag contacts with intent signals, and make sure everything flows smoothly between your marketing, sales, and operations teams. When every lead that enters your CRM is enriched, scored, and routed properly, your sales team stops wasting time on admin and starts spending it on selling.

That's how you go from drowning in spreadsheets to running a tight, efficient revenue motion.

Now, let's talk about the top sales and lead generation agencies in the Netherlands.

What we considered to make this list of the best Dutch sales and lead generation agencies

We didn't just throw together a random list. We evaluated each agency on this list based on criteria that actually matter when you're trusting someone with your pipeline and growth.

Here they are.

Outbound and inbound sales and lead generation capabilities

We looked at whether each agency can handle both outbound (cold email, LinkedIn outreach, cold calling) and inbound (website visitor tracking, form follow-up, lead scoring, lead nurturing). The reason this matters is simple. Most B2B buying journeys don't happen in a straight line.

A prospect may see your LinkedIn post, visit your website a week later, ignore your first email, and then respond to a second one after they see a relevant case study. If your agency only does outbound or only does inbound, you're leaving money on the table.

The best agencies know how to connect both sides of the equation so that no signal goes unnoticed and no warm lead slips through the cracks.

Some agencies on this list only do one or the other, and we've made that clear in each write-up so you can decide what matters most for your situation.

Tech savviness and automation capabilities

In 2026, running outbound manually is slow, expensive, and honestly just unnecessary. We looked at how each agency uses modern tools like Clay, Instantly, Lemlist, HubSpot, n8n, PhantomBuster, Apify, and AI to automate workflows, enrich data, and scale campaigns without sacrificing personalization.

This goes beyond just using a cold email tool. We considered whether the agency can build custom automation workflows that pull data from multiple sources, enrich it in real time, qualify leads automatically, and trigger the right outreach at the right moment.

Sales and lead generation experience

Does the team behind the agency actually understand sales? Have they carried a quota? Do they know what a good discovery call looks like?

We prioritized agencies that bring actual sales DNA to the table beyond the marketing or automation skills everyone talks about.

Proven track record with Dutch and European markets

The Netherlands has its own business culture. Direct communication, GDPR compliance, and a preference for substance over fluff. We looked at agencies that have experience operating in the Dutch market and understand the nuances of selling here.

Transparency, pricing, and flexibility

We also looked at how each agency handles communication, reporting, and pricing. This is where a lot of agencies fall short.

Some lock you into long-term contracts before you've even seen a single result. Others charge a retainer with no clear reporting on what's actually happening with your campaigns.

At the end of the day, you should always know exactly what you're paying for, what's being done, and what results you're getting.

Depth of service versus breadth of service

Some agencies on this list are full-service marketing firms that also offer lead generation as one of many services. Others are laser-focused on outbound sales and nothing else.

Neither approach is inherently better, but it matters depending on what you need.

Before we get into the detailed write-ups, here's a quick at-a-glance comparison across the 12 agencies on this list. Each agency is rated on the criteria above so you can scan and shortlist faster.

Service model:

• Build = the system is handed off for your team to operate afterwards.

• Hybrid = some elements are handed off, others stay managed.

• Managed = the agency continues to run the work.

The 11 best sales and lead generation agencies in the Netherlands to consider alongside Nebor.ai

Now that you know what we bring to the table at Nebor, let's take a fair look at 11 other agencies operating in or serving the Dutch market.

Each one has its strengths, and depending on your specific needs, one of them could be a good fit. We've researched and provided information about both the pros and the cons for each.

1. SalesCaptain.io: AI-driven multi-channel outbound and lead generation agency based in Amsterdam

SalesCaptain is an Amsterdam-based B2B outbound sales agency that helps companies build sales pipelines through cold email, LinkedIn outreach, and multi-channel campaigns. They use AI-driven tools and intent data to optimize their prospecting efforts and integrate with CRMs like HubSpot and Salesforce.

They've worked with over 60 organizations and serve industries including SaaS, B2B services, agencies, and enterprises. They also offer inbound-led outbound capabilities and RevOps support.

What works well: SalesCaptain has a solid multi-channel approach that goes beyond just cold email. They include LinkedIn content programs and paid advertising to generate intent data alongside outbound, and they use tools like Clay and Smartlead, which shows they're keeping up with modern outbound infrastructure.

Their Clutch reviews are positive, with clients reporting strong lead generation results and a proactive team that adjusts strategies based on performance. They also offer scaling capabilities, claiming they can push campaigns to 10,000+ leads per month, which is impressive for volume-driven teams.

Where they fall short: Some clients on Clutch have noted occasional team changes during projects, which affected consistency and reporting quality. While they mention AI and automation, their approach appears to lean more heavily on done-for-you campaign execution than on building systems the client team operates afterwards.

Pricing around $3,500 per month was mentioned in some reviews, but it's unclear what exactly is included at different tiers. Their focus on volume (10k leads/month) could also raise questions about lead quality versus quantity for companies with niche ICPs.

Best for: B2B SaaS companies and service businesses that want a hands-off outbound partner in Amsterdam who can scale campaigns quickly across multiple channels.

If your primary goal is high-volume pipeline generation and you're okay with the agency managing everything end-to-end, SalesCaptain is worth exploring.

If you want a partner who builds the full revenue system (outbound, inbound capture, intent monitoring, and RevOps) and hands it back to your team to keep operating after the engagement, that's where Nebor.ai is the better fit.

2. Saleslift Studio: B2B sales development and outbound prospecting agency based in Amsterdam

Saleslift Studio was founded by Terry van den Bemt (former CCO of Pepperminds and author of "The Sales Architect") and Davy Guijt, who has extensive commercial director experience at fast-growing tech companies.

They're a B2B sales development agency based in Amsterdam that specializes in building outbound prospecting strategies and executing them on behalf of clients.

They've worked with brands like Freshworks, Incentro, and Pon, and they also have a partnership with INTRO Business Contact for the DACH region.

What works well: The founding team's background is a genuine differentiator. Terry's sales leadership experience and Davy's commercial director background mean they bring strategic depth that goes beyond just running campaigns.

They also have a Clay certification and built their own proprietary tool called Lead Studio for prospect identification and enrichment.

Where they fall short: With around 13 employees, they're a relatively small team, which could limit their capacity to handle multiple large-scale engagements simultaneously.

Their website is primarily in Dutch, which could make them a better fit for the local Dutch market rather than international growth.

While they mention technology and Clay, they don't appear to build the same depth of automated, always-on workflow systems that an agency like Nebor does.

Their approach seems more focused on human-driven SDR execution with tech support rather than full automation-first infrastructure.

Best for: Dutch B2B companies that want an experienced sales development partner to handle outbound prospecting with strong strategic input and a collaborative, workshop-driven approach.

If you value deep sales expertise in the founding team and prefer a hybrid of human SDRs supported by technology, Saleslift Studio is a strong choice.

If you want a partner who goes beyond outbound prospecting into the full GTM motion (inbound capture, intent monitoring, demand gen, and RevOps connected as one engine), Nebor.ai is the broader fit.

We bring the same founder-led sales DNA Saleslift does, but we build the system that runs across every channel.

3. 24/SALES: GTM systems agency designing and operating commercial infrastructure for B2B SaaS

24/SALES is a Dutch GTM systems agency that designs, builds, and runs commercial infrastructure as one integrated Go-To-Market system for B2B SaaS and tech companies with product-market fit.

They split their offering into three services. GTM Diagnose (a strategic readiness scan), GTM Engineering (the build phase), and GTM Operations (the running and iterating phase).

Their case studies highlight clients like Yenlo, where they helped transition from founder-led selling to a structured outbound approach, and Van Mossel, where a custom signal-based scoring model produced a 29% increase in booked meetings.

What works well: 24/SALES is the closest direct competitor to us on this list, and we'll be honest about that.

They share our core thesis (build systems that compound rather than running campaigns that disappear), and their five-principle framework, especially "Ownership lives with your team," is the kind of positioning we respect.

Their GTM Diagnose offering is well-structured, scanning eight areas of revenue readiness before they touch any build work.

That diagnostic discipline is real, and the Yenlo and Van Mossel case studies show they can take a company from a messy GTM motion to measurable structure.

Where they fall short: As a smaller agency, their public case studies are still relatively few, which can make it harder to gauge depth across different industries and stages.

Their public materials lean heavily on the strategy and process side, with less visibility into the specific tool stack or workflow patterns they use most often.

They also frame themselves primarily around "GTM" as a category, which fits well for B2B SaaS but may resonate less with non-SaaS B2B verticals like services, consulting, or hardware.

Best for: B2B SaaS companies with product-market fit that want a structured, diagnose-first engagement with an agency that thinks in terms of revenue systems rather than campaigns.

If 24/SALES's three-phase model (diagnose, engineer, operate) matches how you want to scope the engagement, they're a strong fit.

If you want a partner with the same systems-first thesis but with deeper Clay-native workflow design, openly documented playbooks (you can browse most of our build patterns on our blog), and founder-led sales DNA from inside companies like Gartner and OneStream, Nebor is the closer match.

4. DGTLMOTION: go-to-market engineering and growth strategy agency in the Netherlands

DGTLMOTION positions itself as a team of Heads of Growth and GTM Engineers who combine technical skills with product knowledge and growth strategy. 

They build systems that generate leads, pipeline, and revenue by connecting marketing technology, sales operations, and data. They work primarily with scale-ups and SMEs in the Netherlands with revenues between €1 million and €50 million.

What works well: DGTLMOTION has a strong GTM engineering mindset, which means they’re not just running campaigns but actually building the underlying tech infrastructure. 

They claim expertise in over 100 tools and focus on building complete tech stacks tailored to each company’s phase and goals. 

Their approach to automating lead lists, enrichment, and outreach flows is impressive, and they talk about scraping 200+ job openings per day for recruitment-focused clients. 

The no-junior commitment and full transparency in processes are nice touches. They also do web development in Framer and Webflow, which adds value if you need a marketing site alongside your lead gen.

Where they fall short: While they position themselves as growth engineers, their actual case studies and detailed track record in outbound sales specifically are harder to find. 

They seem to lean more heavily on the marketing and tech side rather than deep outbound sales execution. Their messaging is broad, covering everything from ICP refinement to web development, which can make it unclear what their core focus really is. 

For a company that specifically needs done-for-you outbound lead generation, the breadth of their services could mean less depth in pure sales execution compared to a more focused agency.

Best for: Dutch scale-ups and SMEs that need a technical partner to build out their go-to-market tech stack from scratch, including CRM setup, data enrichment flows, and marketing automation. 

If you need someone to architect and build the systems alongside running campaigns, DGTLMOTION is a solid option. 

But if you’re specifically looking for a sales-/lead-generation-first agency with deep outbound expertise and custom Clay workflows that tie directly to revenue, our focused approach and sales DNA gives you a more targeted outcome.

5. closed:in: done-for-you B2B cold email and outbound lead generation agency

closed:in is a done-for-you cold email and outbound lead generation agency that helps B2B companies build predictable growth engines. 

They handle everything from ICP definition and lead sourcing to email infrastructure setup (SPF, DMARC, DKIM), domain purchasing, copy writing, and campaign management. 

They promise up to 20 qualified meetings per month and emphasize their deliverability-first approach.

What works well: closed:in keeps things simple and focused, which can be refreshing. 

They have a clear three-step process (build lead lists, enrich with targeted data, run campaigns with optimized infrastructure), and their client testimonials speak to quick results and a hands-off experience for clients. 

The focus on email deliverability and technical setup (fresh domains, proper authentication) shows they understand the fundamentals of cold email. 

Where they fall short: Their approach appears to be almost exclusively focused on cold email, without much mention of LinkedIn outreach, intent data monitoring, or multi-channel capabilities. 

For the Dutch market specifically, where direct, multi-channel approaches tend to perform better, this single-channel focus could be a limitation. 

There’s also limited public information about their team size, founding story, or specific Dutch market expertise, making it harder to evaluate their depth. 

Their promise of up to 20 qualified meetings per month is a fairly standard agency claim, and the actual results will vary significantly depending on the client’s ICP and offer.

Best for: B2B companies that want a straightforward, no-frills cold email engine set up and managed for them without a lot of complexity. 

If your primary goal is getting cold email campaigns live quickly with solid deliverability, closed:in can deliver. 

That said, if you want multi-channel outreach, intent data workflows, inbound-outbound integration, and a full sales system you own, Nebor offers a far more comprehensive approach that goes well beyond cold email.

6. Outventure: digital marketing agency focused on SEO, paid ads, and lead generation services

Outventure is an Amsterdam-based digital marketing agency that combines inbound lead generation channels (SEO, Google Ads, CRO) with outbound capabilities (cold email and LinkedIn outreach). 

They’ve worked on campaigns across the Benelux region and share detailed metrics like specific cost-per-lead numbers and signup conversion improvements. 

Their case studies show results like 30-40 leads per month at around $100 CPL, and they’ve helped companies enter new markets like the Benelux with targeted outreach.

What works well: Outventure stands out for blending inbound (SEO, paid ads, CRO) with outbound (email and LinkedIn), which gives clients a more holistic approach to lead generation. 

Their case studies are refreshingly specific, sharing actual CPC numbers, conversion rates, and CPL figures rather than vague promises. They seem to have genuine expertise in paid media optimization and can drive inbound leads alongside outbound campaigns. 

Where they fall short: Outventure’s strength in inbound marketing (SEO, paid ads) may come at the expense of deep outbound expertise. 

Building scalable, automated outbound systems with Clay, intent data, and multi-step enrichment workflows doesn’t seem to be their core focus. 

Also, they appear to be more of a generalist digital marketing agency that also does outbound, rather than a specialist outbound sales agency. Their outbound capabilities are not very well documented publicly.

Best for: B2B companies that want a combined inbound and outbound approach under one roof, especially if paid ads and SEO are important parts of their growth strategy. 

If you need someone to run Google Ads, optimize landing pages, and also send some cold outreach, Outventure covers that spread. 

But if your primary need is deep outbound sales automation with custom workflows, intent data, and done-for-you prospecting at scale, our outbound and automation expertise is a better fit.

7. LeadWarmr: outbound SaaS marketing agency specializing in cold email and LinkedIn from Bilthoven

LeadWarmr is a B2B lead generation agency based in Bilthoven, Netherlands, that specializes in scaling outbound marketing for SaaS companies through cold email and LinkedIn. 

What works well: LeadWarmr’s niche focus on SaaS outbound marketing is a clear advantage if that’s your industry. They understand the SaaS sales cycle, the importance of demo bookings, and how to position technical products in outreach messaging. 

Offering paid advertising alongside outbound means they can support multi-channel acquisition. Their Bilthoven location gives them a local Dutch presence, and specializing in one vertical often means expertise in that space.

Where they fall short: LeadWarmr has limited public reviews and case studies, which makes it harder to evaluate their track record compared to more established agencies. 

Their Clutch profile currently shows no reviews, and their website provides relatively limited detail on their specific processes, tech stack, or results. 

For a company that needs a proven, well-documented partner, this lack of social proof could be a concern. It’s also unclear how deeply they go into automation and system-building versus just running campaigns.

Best for: Early to mid-stage SaaS companies that want an outbound partner specifically experienced in the SaaS space, with the option to add paid advertising. 

If you’re a SaaS startup looking for a smaller, potentially more hands-on partner in the Netherlands, LeadWarmr is worth a conversation. 

That said, if you want battle-tested systems with documented case studies, deep Clay and automation expertise, and an agency that’s proven it can generate millions in pipeline, Nebor.ai offers a more established and comprehensive solution.

8. LeadMasters International: B2B sales meeting booking and prospecting agency with offices in the Netherlands and Spain

LeadMasters International is a company with offices in the Netherlands and Spain that focuses on booking sales meetings for B2B companies. 

They use phone calls, emails, and LinkedIn messages to reach decision-makers, qualify leads, and set up appointments. Their primary markets are the US, UK, Canada, and Australia, but they serve Dutch companies as well. 

Their approach starts with understanding the client’s ideal customer, building targeted lists, and then conducting multi-channel outreach.

What works well: LeadMasters has a clear, focused value proposition: they book meetings. 

Their multi-channel approach (phone, email, LinkedIn) means they’re not relying on a single channel, and their emphasis on qualifying leads before passing them to clients shows attention to quality. 

Having offices in both the Netherlands and Spain gives them multilingual capabilities and potentially lower operational costs. 

They position themselves as a long-term sales development partner that can help clients build and train internal teams beyond delivering leads.

Where they fall short: Their primary focus on English-speaking markets (US, UK, Canada, Australia) means their Dutch market expertise may not be as deep as agencies that focus exclusively on the Netherlands. 

The approach appears to be more human-driven (SDRs making calls and sending emails) rather than automation-first, which can limit scalability and increase costs over time. 

There’s limited public information on their specific tech stack, automation capabilities, or detailed case studies with metrics.

Best for: B2B companies targeting English-speaking markets that want an outsourced team to handle prospecting and appointment setting through phone, email, and LinkedIn. 

If your sales team needs more meetings and you want someone to handle the entire qualification process before handing off warm prospects, LeadMasters International delivers on that promise. 

However, if you’re looking for a technology-first agency that builds automated systems with Clay, intent data monitoring, perpetual lead generation workflows, and true Dutch experience, we are a significantly more advanced and scalable choice.

9. Leapforce: HubSpot Diamond Solutions Partner combining marketing, sales, and service into one customer journey

Leapforce is a Dutch digital marketing and HubSpot agency that connects marketing, sales, and service into one customer journey.

As an official HubSpot Diamond Solutions Partner, they specialize in HubSpot implementations, full-funnel marketing (advertising, growth marketing, automation, ABM, CRO, SEO, social ads, AI-driven marketing), and HubSpot sales configuration.

They've worked with 200+ brands, with documented case studies including Urban Arrow (a 200% efficiency gain in dealer process through HubSpot), DHOMUS (millions in deal value across four brands in 12 months), and Amvest (digital transformation with HubSpot as the foundation).

What works well: Leapforce brings serious depth on the HubSpot ecosystem side. As a Diamond Solutions Partner, they have direct accreditation that puts them among the top-tier HubSpot specialists in the Dutch market.

Their case studies are refreshingly concrete, with named clients, specific metrics, and clear before-after pictures of what the engagement delivered.

The breadth of their service portfolio is genuinely impressive (marketing automation, advertising, CRO, website development in HubSpot, AI-driven content, ABM, sales dashboards), so if your growth plan centers on HubSpot being the operational backbone, they're well-positioned to support every layer.

Where they fall short: Leapforce's positioning is fundamentally HubSpot-centric.

If you're not already running on HubSpot, or your strategy benefits from a more flexible tool stack (Clay for enrichment, n8n for orchestration, Instantly for cold email, multiple data providers for waterfall enrichment), Leapforce's HubSpot-first approach may feel constrained.

Their website is primarily in Dutch, which could signal a stronger fit for local Dutch-speaking teams than for international B2B teams operating in English.

Their outbound sales and cold email capabilities are also less prominent in their published work than their marketing and HubSpot implementation track record.

Best for: Dutch B2B companies whose growth strategy is centered on HubSpot as the operational backbone, especially if you want one partner to handle marketing automation, content, paid ads, website development, and HubSpot sales configuration in a single engagement.

If your stack is already HubSpot and you want the deepest Dutch HubSpot expertise available, Leapforce is a strong choice.

If you want a partner who builds the full GTM motion across whatever stack fits your business (not just HubSpot), with Clay-native enrichment, signal-based outbound, and intent monitoring as core capabilities, Nebor.ai is the more flexible and outbound-tested alternative.

10. Dapper Agency: demand generation and B2B marketing powerhouse based in Rotterdam

Dapper Agency is one of the bigger names on this list. They’re a B2B marketing agency based in Rotterdam with a team of around 50 marketers. 

They describe themselves as “The Demand Agency” and focus on building marketing engines that generate pipeline. Their services include content and creative, paid media and performance marketing, data and measurement, and demand generation. 

They’ve worked with over 100 B2B companies and specialize in SaaS, hardware, and professional services.

What works well: Dapper’s team size and depth of expertise in B2B marketing is hard to match. They cover the full marketing spectrum, from SEO and content marketing to paid ads, LinkedIn thought leadership, and CRO. 

Their emphasis on becoming “Niche Famous” (their own framework for building brand authority in your category) is a smart long-term approach to demand generation. 

Where they fall short: Dapper is fundamentally a marketing agency, not a sales or outbound lead generation agency. 

While they do support outbound and ABM efforts, their core strength is in demand generation through content, advertising, and brand-building, not in building automated outbound sales systems. 

If you need done-for-you cold email campaigns, Clay workflows, or intent data monitoring, that’s not really Dapper’s specialty. 

They’re also a larger agency with what appears to be premium pricing (minimum project size of $10,000 based on some sources), which may not suit smaller teams or companies looking strictly for outbound support.

Best for: B2B companies (especially SaaS and tech) that want a comprehensive demand generation partner to build their marketing engine, create content, run paid campaigns, and drive inbound pipeline over time. 

If you’re playing the long game with brand-building and demand creation, Dapper is excellent at that. But if you need outbound sales meetings booked this month, automated Clay workflows feeding your CRM, and a sales-experienced team running your prospecting, Nebor.ai is purpose-built for that specific need.

11. Convins: the Netherlands’ largest B2B telemarketing and lead generation agency with offices in Utrecht, Apeldoorn, and Deventer

Convins is the largest B2B telemarketing agency in the Netherlands, with over 85 permanent employees and 16 years of experience. 

They operate from offices in Utrecht and Apeldoorn (and have Spanish offices for European expansion), and they specialize in generating qualified meeting appointments through phone calls. 

They work on a no-cure-no-pay model, meaning you only pay for appointments that actually take place and meet your predetermined criteria.

What works well: Convins’ scale and experience in the Dutch market is hard to beat for telemarketing specifically. With 85+ permanent, salaried employees (not freelancers or students), they bring professionalism and consistency.

Their no-cure-no-pay model is genuinely risk-reducing for clients, as you only pay for results. They don’t use call scripts, which means their conversations are natural and more likely to resonate with Dutch decision-makers. 

You get a client portal for tracking calls, appointments, and results. They also offer recruitment, training, and consultancy services alongside lead generation.

Where they fall short: Convins is a telemarketing agency at its core. They don’t build automated outbound systems, don’t manage cold email infrastructure, and don’t set up Clay workflows or intent data monitoring. 

In a world where multi-channel outreach consistently outperforms single-channel approaches, relying solely on phone calls limits your reach and scalability. 

Their approach is also inherently labor-intensive, and while quality is high, the cost per appointment on a no-cure-no-pay model will reflect that. They also don’t appear to offer inbound lead nurturing or CRM automation.

Best for: Dutch B2B companies in industries like consultancy, law, recruitment, or ICT that value the personal touch of phone-based outreach and want a proven, no-risk telemarketing partner. 

If your target audience responds well to phone calls and you want a guaranteed results model, Convins is a safe, well-established choice. 

However, if you want a modern, multi-channel approach that combines email, LinkedIn, phone, and automated intent data workflows into one system, Nebor.ai delivers a far more complete and scalable solution for today’s B2B environment.

Hire Nebor.ai to build a sales system that actually works for your Dutch B2B business

If you’ve made it this far, you probably have a pretty clear picture of what’s out there in the Dutch sales and lead generation landscape. 

Some agencies are great at marketing, some are strong in telemarketing, and some run solid cold email campaigns. Each one has its place.

But if what you’re looking for is a partner that combines real sales experience with cutting-edge automation, builds systems you actually own, ties inbound and outbound together, cleans up your CRM, and fills your calendar with qualified meetings while your team focuses on closing, then we’d love to talk.

At Nebor.ai, we’ve helped companies generate millions in pipeline using exactly the approach we’ve described in this article. We don’t believe in one-size-fits-all solutions. 

Every business is different, and your sales infrastructure should reflect your specific market, ICP, and growth goals.

If you're serious about building a repeatable, low-friction GTM system for the Dutch market (or beyond), book a 15-minute call with us.

We'll give you advice on whether what we do is the right fit for you, and we'll show you real systems and real outcomes.