Apollo.io is a B2B sales platform that the company calls an AI GTM system; GTM (go-to-market) means the work of finding, contacting and winning customers. Its core is a database of more than 240 million contacts and 30 million companies, searchable by more than 65 attributes, including firmographic data (facts about a company), contact details, job changes and intent signals.
A user builds a list of prospects, finds their email addresses and sends them sequences, which are series of outreach emails that run automatically on a schedule. Apollo also enriches records, which means it fills in missing contact and company data in a CRM or a CSV file. Its AI agents can research prospects, build lists, write outreach, follow up and book meetings. Apollo also works inside other tools through a Chrome extension, more than 200 integrations, and connections to ChatGPT and Claude.
Apollo is a hosted service. It has a free plan with no time limit and paid plans for each seat (user); actions in the platform use credits.