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Summary: Apollo AI is an AI-powered B2B sales intelligence and engagement platform that combines a massive contact database with prospecting, outreach automation, and CRM enrichment tools. Founded in 2015 as ZenProspect and a Y Combinator alum, it has grown to over 5 million users and more than 100,000 paying customers, with annual recurring revenue estimated at $265 million by September 2026. It is available via web browser and API, with a free tier and paid plans starting at $49 per user per month.

What is Apollo AI?
Apollo AI is an all-in-one go-to-market platform developed by Apollo AI, Inc., a San Francisco-based company founded in 2015 by Tim Zheng, Roy Chung, and Ray Li. It operates on a database of more than 240 million contacts across 30 million companies, self-reported at 98% email accuracy, and layers prospecting, enrichment, and multichannel outreach on top of that data. Users can build ideal customer profiles using 65-plus filters, run email, phone, and LinkedIn sequences, use a built-in dialer with call recording, and sync enriched records directly into their CRM. The company rebranded from ZenProspect to Apollo AI in 2018 and has since recovered from a near-collapse in 2018–2020 through a product-led growth strategy built around its freemium model. In February 2026, Matt Curl became CEO while founder Tim Zheng moved to chairman, and the company acquired revenue-intelligence startup Pocus in March 2026. Its 2026 roadmap leans heavily into agentic AI, including an AI Assistant that executes workflows, native apps inside ChatGPT and Perplexity Computer, and an Apollo MCP connector.

Verifiable Stats:

Apollo AI has raised approximately $251 million in total funding across six rounds, including a $100 million Series D in August 2023 led by Bain Capital Ventures with participation from Sequoia Capital, Tribe Capital, and Nexus Venture Partners.
The company reached a valuation of $1.6 billion with its Series D in August 2023, nearly doubling its previous valuation.
Sacra estimates Apollo AI hit $265 million in annual recurring revenue by September 2026, up from $194 million at the end of 2025 and $150 million in May 2025.
Apollo AI reported nearly 100,000 paying customers in February 2026 and served more than 5 million users across over 600,000 companies by September 2026, including more than 100 teams at Fortune 500 companies.
The platform offers a free tier with 900 credits per year and paid plans starting at $49 per user per month, with Professional at $99 per user per month and Organization/Enterprise at $119 per seat per month with a three-seat minimum.

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Best AI Business Development Tools AI Tools & Software (2026)

Apollo AI