TL;DR: Apollo is evolving from a PLG sales tool into an all-in-one GTM platform with CRM against the insurgent threat of Clay and the incumbent juggernaut HubSpot. Sacra estimates that Apollo.io hit $150M ARR in May 2025, with $134M ARR at year-end 2024, up 40% year-over-year. For more, check out our full report and dataset on Apollo...