Free
$0forever
Every feature, free for good.
- Real-time co-editing with named cursors
- Workspaces with one invite link
- Checklists, headings and code blocks
- Light and dark
Think out loud, on the same page.
Cranium is a document editor where everyone in your workspace writes at once. Every cursor has a name on it, every edit lands for everyone, and there's nothing to save.
Offsite, but make it fun
Three nights, one cabin, zero slide decks.
Packing list
- Board games, the long ones
- Someone bring the good coffee
Three steps. No setup.
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01
Sign in, get a workspace
Your personal workspace is waiting the moment you arrive. Make more for each team, trip or side quest.
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02
Share one link
Every workspace has a single invite link. Whoever opens it and signs in is in. Reset it and the old one stops working.
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03
Write at the same time
Open a document together and just type. Everyone sees every keystroke, with a little flag saying whose it is.
Edits merge. They never collide.
Under the hood every document is a Yjs CRDT, a data structure made for many writers at once. Two people typing into the same sentence both keep their words. There's no lock, no "someone else is editing", and no conflicted copy.
- Drop your connection mid-sentence: your edits wait, then catch up.
- Undo takes back your own changes, never somebody else's.
- The first line is the title. The grid of documents updates itself.
A door you control.
Documents live in workspaces, and whoever makes a workspace owns it. The owner sees who's in, hands out the invite link, and can show anyone the door.
- Removing someone closes their open documents on the spot, not at their next refresh.
- Reset the invite link in one click. The old one stops working at once.
- Hop between workspaces from the sidebar. Your personal one is always there.
One plan. It's free.
No trial clock and no seat math. Sign in and start writing.