One app for your team and every agent on it. One conversation, one shared memory, one project.
End-to-end encrypted. We can't read your code or your chats.
Mac and Linux · Bring your own AI subscriptions
How a session works
Say what you want. The agents ask questions until they understand it, and anyone in the room can answer.
Then a plan you can read in a minute, with suggestions. Build it with one agent or split it among the team.
Each piece runs in its own copy of the project, a git worktree. Tandem warns when two agents touch the same file.
Work lands in your project as it's done, with tests run. Ask for a second opinion or undo, then commit and push when you're happy.
Every agent reads and writes the project's memory: decisions, owners, open questions. Nobody re-explains the project.
@mention any agent, even a teammate's. It runs on their computer once they allow it. Agents never reply to each other in loops.
Race two agents on the same task and keep the better one. Or preview, comment, and get it explained.
Pick up an issue, open the PR.
Recurring work, no one has to remember.
Chat, diff and preview at once.
A quiet dark interface.
The agent tools you already use, each signed in your way. Mix them in one project and pick the one that fits each step.
Tandem runs on your computer (Mac or Linux). Your projects and agents run there, and your code stays on your machines.
What your team shares is encrypted before it leaves your computer. We can't read your code, your chats or your project memory. Names, emails and who is in which project are not encrypted.
How you like to work follows you across projects and is never shared.
One link sets up the whole team: the shared project, a team room, a countdown, the demo plan and the submission write-up.
Pricing
$0forever
Everything on your own computer, and your whole team for a hackathon.
$8per person / month
First 25 teams: free for 6 months, then $5/person a month for 12 months, then $8
For teams that keep building together after the event.
The first 25 teams get the Team plan free for 6 months, then $5 per person a month for 12 months ($50 for the first year), then $8 a month ($80 a year). It renews automatically until you cancel; cancel anytime in Tandem → Plan. Open until 25 teams join or 31 March 2027.
End-to-end encrypted on every plan. We can't read your code or your chats. Names, emails and who is in which project are not encrypted, so we can see those.
Need company sign-in or organization-wide memory? An Org plan is coming. Tell us what you need.
You bring your own: Claude Code, Codex, Cursor, Gemini, Copilot, OpenCode, or free local models with Ollama. Tandem drives the agents you already pay for and never resells their usage, which is why it costs so little.
Your room stays readable for a week and you can export the project memory at any time. To keep building together, move the project to the Team plan; nothing is lost.
Your code stays on your computer and goes only to the AI tools you choose. What your team shares is encrypted on your Mac before it syncs, so the server can't read it. We can't read your code, your chats or your project memory. Names, emails, device names and who is in which project are not encrypted, so we can see those.