A person approves.
Emails, purchases and anything that reaches people or money wait for a human by default.
Your agent. Out in the world.
AI agents can now research a market and write a good email as well as a first sales hire. What they lack is somewhere safe to send from: warm inboxes, clean DNS, a schedule that respects limits, and a person who approves what goes out. Sellbird is that place, and it began as an open-source project.
Why Sellbird exists
Cold email works when it is personal and when it lands. The first part is now cheap: any agent can read a company's website and write something specific. The second part is still hard. Domains, inboxes, warmup, DNS records, sending limits, bounce handling and reply sorting are tedious, and getting them wrong burns a domain.
Sellbird does that part. It has no AI of its own, so it never competes with the agent you chose, and it never charges you for thinking you already pay for.
What we hold to
Bring your own intelligence.
Your agent, your plan, your choice. We run the infrastructure underneath.
Open at the core.
The self-hosted version is public and free, and stays that way.
Make the first move.
Connect your agent and send your first approved email today.