A better place to write things down.
E.D.I.T.H is a real-time collaborative workspace for teams who write specs, run retros and keep decisions somewhere they can be found again. It has the AI, the diagrams and the history — without the per-seat bill that makes you think twice about inviting the third engineer.
Live
Open a workspace, write a page, invite someone. No card to start.
What it does
Collaboration
Everyone's cursor, in the same paragraph
Built on CRDTs, so two people editing the same sentence merge cleanly instead of one overwriting the other. Close your laptop mid-sentence, reopen it on a plane, keep typing — the edits reconcile when you reconnect.
AI
AI that edits the page, not a chat window beside it
Select a paragraph and rewrite, shorten or continue it. Every change arrives as a diff you accept or reject, so nothing lands in the document without you seeing it first. Ask a question about the page and get an answer that cites the blocks it used.
Diagrams
Diagrams that live in the document
Mermaid flowcharts, sequence and state diagrams render inline and stay editable as text — so they diff, merge and review like the rest of the page. Paste a spec with fenced mermaid in it and the diagrams simply appear.
History
Version history with a way back
A version is saved automatically when you stop editing, and you can name one at any point. Preview any version before restoring it, and the state you replaced is kept automatically in case you change your mind.
Structure
The blocks an engineering team actually needs
Action items with an owner and a due date. Comment threads anchored to the text they discuss. Page links with backlinks, @mentions, syntax-highlighted code, and a review flow for sign-off.
Control
Your data, on your terms
Workspaces, spaces and per-page roles. Runs on Postgres or SQLite, ships as a container, and can be self-hosted on a single box if you would rather it never left your network.
Pricing
Per-seat pricing makes you ration your own team. This does not.
Free
$0
Everyone. There is no seat count to keep an eye on.
- Unlimited pages and spaces
- Real-time editing, comments, version history
- Diagrams, action items, page links
- Comments, search, code blocks, retros
- MCP endpoint — connect Claude to your docs
- Self-host on your own Postgres
Pro
AIAIusage-based
The workspace is free. The model is what has a bill behind it.
- Everything in Free
- Ask any page — answers cite their blocks
- Draft, rewrite and restructure in place
- Proposals you review before they apply
Ten people on a per-seat tool runs $100 – $150 a month. Here the workspace is free however many of you there are — the fourth teammate, and the fortieth, cost nothing to add.
Where it differs
E.D.I.T.H is not trying to be every tool at once. It is trying to be the best place to write a spec with other people.
| E.D.I.T.H | Typical per-seat suite | |
|---|---|---|
| Price, 10 people | $0 — every seat included | $100 – $150 / month, per seat |
| Diagrams | Mermaid, inline and editable as text | Embed a third-party board |
| AI edits | Reviewable diff, accept or reject | Applied to the page |
| Offline | Full local copy, edits merge on reconnect | Limited |
| Self-host | Container, Postgres or SQLite | No |
| Agent access | MCP endpoint, on the free plan | No |
What it is not, yet: there are no spreadsheet-style databases, and image uploads are not in. If your workspace is really a database with a text field attached, E.D.I.T.H is the wrong tool and we would rather you knew that now.