Read it. Run it. Or let us run it.
Sellbird started as an open-source sales agent, and the self-hosted version stays free. It runs on your own computer: it finds businesses, collects buying signals, writes personal emails with your Claude or Codex plan, sends from your inboxes and handles replies. Hosted Sellbird shares the outreach workflow, with scheduled sending and reply collection; your connected agent supplies the research.
$ git clone https://github.com/ethanplusai/sellbird.git && cd sellbird
$ python3 -m venv .venv && source .venv/bin/activate && pip install -e .
$ sellbird setupComing from Harvey? Here’s what changed and how to upgrade.
Self-hosted or hosted. Shared workflow, different setup and capabilities.
| Self-hosted | Hosted | |
|---|---|---|
| Setup | You create and connect Google Cloud or Entra, Cloudflare and a warmup account | Sign up, connect your agent, one admin step for Google or Microsoft |
| Sending | While your computer is on | Always on |
| Warmup | Your own warmup account and bill | Included |
| AI | Your Claude or Codex plan, on your computer | Your own agent over MCP, from anywhere |
| Prospecting | Built in: discovery, signals, email finding | In your agent, with the tools you give it |
| Several businesses | One install each | Many workspaces in one account |
| Cost | Free | Early access; pricing shared before you pay |
Open source,
answered.
What happened to Harvey?
Harvey is now Sellbird. The name Harvey belongs to another AI company, so the open-source project took a name of its own in version 0.4.0. It is the same project with the same history, and old GitHub links redirect. An existing install upgrades with git pull and pip install -e ., and its settings and data carry over.
Is Sellbird open source?
Yes. The self-hosted version is open source and free to run with your own accounts. Hosted Sellbird runs the same outreach workflow for you, with sending, warmup and replies handled, and is in early access.
What do I need to self-host?
A Mac or Linux computer with Python, a Google Workspace or Microsoft 365 mailbox (or any SMTP inbox), a free key from an email verification service, and a Claude or Codex plan if you want it to write on its own.
Does self-hosted Sellbird find prospects?
Yes. It finds businesses from free and paid sources, collects the buying signals you confirm, learns each company’s email pattern and verifies the address. Every paid lookup shows its cost before it runs.
Can I move from self-hosted to hosted later?
Yes, with some setup. The workflow is the same, but contacts and accounts have to be moved over, and hosted connects your agent with remote MCP instead of a local one. It isn’t a one-click migration yet.
Rather not run it yourself?
Hosted Sellbird keeps sending while your computer is off. It’s opening to a small group first.