Apollo bundles a B2B contact database of roughly 210 million people and 35 million companies with prospecting filters, verified emails and phone numbers, buying-intent signals, and multi-step email and LinkedIn sequences. A built-in dialer with call recording, meeting scheduling, and light pipeline management round out the platform. Most teams reach for it to find target accounts, enrich records, and run outreach from one place, with two-way sync to Salesforce and HubSpot. The database breadth and fast filtering are the real draw, and a genuinely free tier lets small teams start prospecting at no cost. It is one of the broad firmographic databases that hand you contacts, direct dials, and firmographic data for decision makers. That works well when an ICP is broad enough to slice by region, revenue band, and industry code, which is exactly where a general database earns its keep. At Nebor we pick the data source based on the client ICP rather than defaulting to one generic database, so Apollo is not the spine of how we build. Where it fits the target profile we sometimes connect it as one source among many through its API, alongside other providers in a waterfall. The value then comes from how the data gets verified, enriched, and routed downstream, not from the raw export. Pairing any single database with a verification pass keeps bounce rates honest, since accuracy varies by region and no one source ever paints the full picture.