Apollo.io is a San Francisco-based company founded in 2015 that specializes in an AI-driven sales intelligence and engagement platform. The platform helps businesses optimize their go-to-market strategies by combining a large and accurate B2B sales leads database with advanced sales execution tools. This enables sales and marketing teams, from startups to large enterprises, to efficiently identify, engage, and convert prospects.

The company offers a unified platform that includes lead intelligence, sales engagement tools, and an evolving AI-powered sales platform. Apollo.io provides access to a continuously updated database of B2B contacts and companies, along with features that automate outreach workflows to enhance sales team efficiency. With a customer base of over 500,000 sales professionals and nearly 9,000 paying customers, Apollo.io is recognized for its data accuracy and effectiveness in improving return on investment.