Apollo

What it does

Apollo is an AI go-to-market system for sales, marketing, and RevOps teams. It combines B2B data with agents that research accounts, build lists, write outreach, and book meetings. You can run the work in Apollo's workspace or connect it to tools like CRM, ChatGPT, Claude, and Gmail.

Apollo brings B2B data, AI agents, and outreach execution into one system. The homepage says it holds 240M+ contacts and 30M+ accounts, and that agents research, build lists, write outreach, follow up, and book meetings. You can work inside Apollo's workspace or connect it to tools you already use, including CRM, ChatGPT, Claude, and Gmail. The pricing page lists a Free plan for exploring Apollo or very light usage, plus Basic, Professional, and Custom tiers. It also says a free trial gives access to most features before committing. The homepage mentions compliance support for GDPR, CAN-SPAM, DNC, and regional regulations, and lists SOC 2 Type II and ISO 27001 among its certifications. The page does not state whether an API is available, so that remains unknown. It also does not state that the software is open source. If you need exact credit limits or feature differences between plans, check the pricing page directly, since the homepage does not list those details.