head to head · open source
harvey vs sellbird
harvey has 4,775 GitHub stars, 1,013 forks, 12 open issues and last shipped yesterday. sellbird has 4,775 stars, 1,013 forks, 30 open issues and last shipped yesterday. harvey leads on adoption by 0% (4,775 vs 4,775 stars). harvey is written in Python under AGPL-3.0; sellbird is written in Python under AGPL-3.0. harvey has attracted 21% as many forks as stars, sellbird 21%. harvey was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 12 topic tags (ai-agent, autonomous-agent, claude, claude-code), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| harvey | sellbird | |
|---|---|---|
| GitHub stars | ★ 4.8K | ★ 4.8K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Python | Python |
| Last push | 2026-11-07 | 2026-11-07 |
| Forks | ⑂ 1.0K | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick harvey if
- You weight community size — 4.8K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick sellbird if
- You want the sellbird feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and sellbird fits your workflow better
About harvey
Harvey An autonomous sales agent that runs on your Claude Code or Codex subscription. Harvey finds businesses worth selling to, learns something specific about each one, writes cold email that references it, sends it, reads the replies, and works the conversation toward a meeting. It runs on your machine, in a loop, on its own. The unusual part: there is no model API bill. Harvey uses your Claude Pro or Max subscription through Claude Code, or your ChatGPT subscription through Codex. Model calls use the plan you already pay for, without an API key or per token API billing. Claude is the default; Codex is an opt…
read the full harvey overview →
About sellbird
The open source outreach platform that runs on your Claude or ChatGPT plan. Sellbird finds companies that need what you sell, finds the person who decides, checks their email address, writes each one a personal cold email, sends it and handles the replies. It runs on your own machine, and by default nothing goes out until you approve it. Harvey is now Sellbird. Same project, same history, new name. Already running Harvey? Your setup carries over: see Upgrading from Harvey. Prefer not to run it yourself? sellbird.ai is the hosted version, with sending domains, inboxes and warmup set up for you. It's in early…
read the full sellbird overview →
More in Business Software
Related comparisons
More CRM & Sales projects
Compare either of these against the rest of the CRM & Sales field.
Frequently asked questions
Is harvey or sellbird more popular?
harvey has 4,775 GitHub stars and sellbird has 4,775. harvey has the larger community by that measure.
Are harvey and sellbird free?
Both are open source. harvey is licensed under AGPL-3.0 and sellbird under AGPL-3.0. Neither carries a licence fee.
What is the difference between harvey and sellbird?
harvey is written in Python and sellbird in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, harvey or sellbird?
Choose harvey if you want the larger community (4,775 stars) or its AGPL-3.0 licence terms. Choose sellbird if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.