Open source cold-email projects
Every project in the registry tagged cold-email, ranked by real GitHub adoption.
Autonomous AI sales agent powered by Claude Code or Codex. Finds prospects, writes cold emails, sends campaigns, handles replies, books meetings. No API keys ne
Open-source AI agent for B2B lead generation — describe your product, it finds the people who fit, explains why each one does, and emails them from your mailbox
The largest open-source B2B cold outreach and email warmup service.
Frequently asked questions
How many open source cold-email projects are there?
This registry tracks 3 projects tagged cold-email, with 8,397 GitHub stars between them. The most-adopted is harvey at 4,053 stars.
Are these cold-email projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which cold-email project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these cold-email projects still maintained?
3 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.