About Apollo.io
B2B data and engagement in the same login.
Apollo.io was founded in 2015 in San Francisco by Tim Zheng and Ray Li, originally as ZenProspect, and rebranded to Apollo.io as the product grew beyond a CRM-side prospecting plugin. Investors include Bain Capital Ventures, Sequoia Capital, Y Combinator, Tribe Capital, Nexus Venture Partners and NewView Capital, with later rounds taking the company to over forty thousand paying customers and a reported one million sales professionals on the platform.
What sets Apollo apart from its sales-stack neighbours is the bundle. ZoomInfo and Cognism sell the contact database. Outreach and Salesloft sell the sequences and dialler. Apollo sells both behind one login at SMB and mid-market price points, plus a CRM-light deal board, an AI assistant and a Chrome extension that scrapes LinkedIn into the same workspace. SDRs prospect from the database, push people into a sequence, dial them, and log the meeting against a deal record without leaving the tool.
The reason to pull Apollo into a warehouse is that one tool is also one silo. The contact freshness on enriched records, the reply yield per ICP segment, the dialler-to-meeting ratio per persona and the share of inbound meetings that came from an intent signal all live inside Apollo, disconnected from the CRM, billing and product usage that say whether the deal closed and the customer stayed. Next to those, Apollo data turns into a real revenue picture instead of a self-contained engagement report.