Atrium for
startups.

One place for the team, the work, and the agents doing it with you.

Sound familiar?

Chat, docs, tasks, and calls live in four tools that don’t know about each other.
Everyone uses a different AI tool, and nobody can say what any of them did.
Every new hire means another round of seats and permissions.

The whole toolbox, connectedConversations, documents, tasks, calendars, calls, and files in one space, each able to mention the others.
Agents the whole team sharesTeach an agent a workflow once and everyone has it. What it knows stays with the company.
Bring the tools you already useClaude Code, Cursor, Codex, or whatever arrived this week. Work done through them lands on one record, marked verified when a person saw it and sent it.
Fast, even offlineNo loading screens. Keep working without a connection, and your changes merge in safely.
Build what’s missingMake your own apps on shared sheets, on the same foundation as the built-in ones.
Access that grows with youGroups and explicit grants from day one, so the tenth hire is as easy as the second.