Apollo.io

Apollo.io is a go-to-market platform combining sales intelligence and engagement, built on a proprietary B2B database of more than 200 million contacts and millions of companies. Sales and marketing teams use it to find and enrich prospect data, run outbound email and calling sequences, and manage pipeline, with AI features that recommend targets and automate outreach. It is one of the most widely used sales intelligence and engagement tools, consistently top-ranked on G2. In 2023 the company raised a $100 million Series D led by Bain Capital Ventures at a $1.6 billion valuation, bringing total funding to around $250 million.