Edit together, live.
Everyone in a project sees edits as they happen. Each person's selection shows on the board in their color, so you can tell who's working on what.
Two people can work on different blocks at once without getting in each other's way.
Feedback on the thing it's about.
Comment on a whole board or on a single block, and reply in a thread. Type @ to mention someone in the project; they get a notification that links straight to the comment.
Project chat keeps the wider conversation next to the work instead of in a separate app.
The right access for each person.
Invite by username or email address. Editors change content; viewers can look without changing anything. Only the project's owner can invite people, change roles or remove someone.
When someone only needs to look, make the project public and send the link. They don't need an account. You can also embed a public board on a website.
How sharing works
- Roles
- Owner, editor and viewer. Only the owner manages who has access.
- Invites
- Single-use links that expire after 7 days, accepted by the invited email address.
- Public links
- View-only. Anyone with the link can see the project without signing in.
- Plan limits
- A project shared with you doesn't count toward your own project limit.
- Leaving
- Any member can remove themselves. Trashing a project removes it for everyone.
- History
- Restore an earlier version of the project: 5 days on Free, full history on Pro.
Running a review in Grein
A typical loop for getting feedback on work in progress.
- 1
Put the work on a board.
Add the drafts, references and the question you need answered.
- 2
Invite the reviewers.
Add teammates as editors and stakeholders as viewers.
- 3
Collect comments on blocks.
Ask people to comment on the exact image or note they mean.
- 4
Resolve it in chat.
Use project chat or @mentions to settle open questions.
- 5
Share the result.
Make the project public and send the link, or embed the board.
Questions, answered.
Editors and viewers do, so their changes and comments are tied to them. Anyone can open a public link without one.
Only the owner's. If someone shares a project with you, it doesn't use one of your project slots.
Yes. Switch it to private and the public link stops working. Remove a member to end their access.
Create your first
board.
Start with a question or a few notes. Bring people in when it’s ready.


