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
A session is a normal chat. Propose an idea and the agent offers to plan it with you.
It asks until it understands, suggests improvements, and writes a plan. Nothing is built until you say start.
Each piece runs in its own copy of the project, a git worktree. Tandem warns when two agents touch the same file.
Tests run before you merge. Comment on lines, ask for a second opinion, then merge or undo in one click.
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 merge 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 Cursor-style dark interface.
Sign in with your existing subscriptions, several accounts per agent. Tandem sends work to whichever has the most room left, and switches when one runs out.
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.
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 teams that keep building together after the event.
The first 25 teams get the Team plan free for 6 months, then pay the founding price: $5 per person a month ($50 a year) instead of $8. 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.
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. On the Team plan, Tandem's own small models handle the background work so your limits go further.
Your room stays readable for a week and you can export everything 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.