Zenleads, Inc. (Apollo.io)

Apollo.io is a privately held sales intelligence and engagement platform dedicated to making world-class go-to-market solutions accessible to businesses. The company's core mission is to empower sales and marketing teams by providing tools that streamline prospecting, engagement, and revenue generation. Founded in 2015, Apollo.io maintains its headquarters in San Francisco, California.

The platform offers a comprehensive suite of services, including an extensive B2B contact database with over 270 million contacts and 35 million companies, a verified email and phone number finder, and lead enrichment capabilities. Apollo.io facilitates multi-channel outreach automation across email, LinkedIn, and phone, and integrates with popular CRM systems like Salesforce and HubSpot. It also leverages AI-powered assistants for personalized email drafting, lead qualification, and intent data to identify buyer signals, helping sales professionals optimize their workflows and improve conversion rates.

In recent developments, Apollo.io secured a $100 million Series D funding round in August 2023, which valued the company at $1.6 billion. The company has demonstrated significant growth, reporting a 9x increase in revenue over the two years prior to August 2023 and approaching $200 million in annual recurring revenue with nearly 100,000 paying customers as of February 2026. Leadership changes in February 2026 saw Matt Curl appointed as CEO, with co-founder Tim Zheng transitioning to the role of Chairman. Apollo.io continues to expand its offerings, having acquired Pocus in March 2026 and launching an AI Assistant and an Agentic End-to-End GTM Platform in the same month, solidifying its position as a leading AI-native go-to-market solution.