Buzz: Free Slack + GitHub Where AI Is a Teammate

Jack Dorsey just shipped a free, self-hosted workspace that replaces Slack and GitHub — and lets AI agents join your team like real colleagues.

What just landed

Jack Dorsey — the person who built Twitter and Square — quietly released something called Buzz last week. It's a free workspace your team can run on its own server. It does what Slack does (chat, threads, notifications) and what GitHub does (code storage, code reviews, automated tasks) — both, in one place, at zero cost per seat.

That alone would be interesting. But the part worth sitting with is this: AI agents in Buzz aren't just bots you ping occasionally. They hold their own identity, like a real team member with a name badge. Every message they send, every review they leave, every task they trigger is signed and recorded in an unalterable log. You always know who did what and when — human or AI.

For a small team paying, say, €15–20 per person per month for Slack, plus another chunk for GitHub, this is a meaningful bill to eliminate. For a founder thinking about adding AI to their workflows, it's the first tool that treats that question seriously at the infrastructure level.

It's very new — launched July 21, 2026 — so expect rough edges. But it shot to the top of GitHub's trending list within two days, which usually means the developer community found something real.

Words worth knowing

Self-hosted — Instead of paying a company to store your data on their servers, you run the software on a server you control. More privacy, more control, usually much cheaper.

Cryptographic signature — A tamper-proof stamp on a digital message that proves who sent it and that nothing was changed afterward. Like a wax seal, but mathematically impossible to fake.

Open-source — The recipe is public. Anyone can read it, verify it, or improve it. Usually free to use.

Nostr — A simple, open internet protocol (a set of rules for communication) not owned by any company. Think of it like email — no single business controls it.

Worth thinking about

If you're paying per seat for team chat and code tools, it's worth asking your technical person to take a look at Buzz this month. Even if you don't switch, understanding what's possible changes how you think about the costs you accept as fixed.