Free in beta · Founding users wanted

Know what your AI wrote.
Approve every single change.

Claude · remove "single"

AI is writing more of your work. Stet makes every edit visible, attributed, and yours to accept or reject. Nothing lands without your sign-off.

Download for Mac

Local files · Full history · Any agent

Try below

A pretend terminal. The prompts are real enough.

I'm a Stet markdown document. Run the prompts to see me in action.

AI drafts more of my writing every week. Note to AI · fix the tone It was determined that a mechanism for reviewing these edits would be required.

Claude · fix the tone

That is what Stet does. Note to AI · tighten this up Every single change that an agent proposes is held off to one side in a pending state until you have personally had a chance to look it over and make a decision.

Claude · tighten 1 sentence

Your files stay plain markdown on your machine. Any agent that can write a file can be a co-author.

Claude · add 1 sentence

Review, then let it stand. There is a longer story about how this works, but it can wait for another memo.

Claude · remove 1 sentence

Reset the doc

Most tools treat AI like the final draft

The words just appear, unattributed and unreviewed. Stet treats AI like a co-author.

A Stet document with a rewritten sentence highlighted as a proposal, struck-through old text, and a Claude pill with accept and reject controls

Accept or reject.

Edits arrive as proposals. Accept the good ones. Reject the rest. Nothing lands without your call.

Stet's folder sidebar with per-folder review settings: a contracts folder set to Manual with pending reviews, and a meeting-notes folder set to Auto with changes landed

Per-folder review settings.

Not every folder needs the same attention. Manual folders hold every change for your review. Auto folders let changes land and still highlight what changed. Your call, folder by folder.

A gold Note to AI marker in a Stet document with the instruction: make this a checklist, wrapping the paragraph it applies to

Leave notes for your AI.

Write an instruction right in the doc. Your agent picks it up and the edit comes back for review. A comment thread with your co-author.

Stet's file tree showing markdown files with pending-review badges, and edits from Claude, ChatGPT, and a local model on the same file

Plain files. Any agent.

Your docs are markdown on your machine. Any AI that can read a file becomes a collaborator. No integration, no API key.

A document's history panel in Stet listing recent versions: changes accepted from Claude today, an edit by you, and an older version with a restore button

Document history.

Every document keeps its history. See what changed and when. Step back to an earlier version if a change was a mistake.

A teammate's change arriving from a shared GitHub branch in Stet, with the edited sentence highlighted and a review changes button

Collaborate over GitHub.

Point Stet at a GitHub repo. When a teammate pushes a change, it shows up as a proposal to review, just like a change from Claude.

Let it stand.

"Stet" is the proofreader's mark for "keep this change." Every review ends with that call. The mark is yours.

Built for people whose notes are already plain text and whose drafts start in a chat window.

It's a beta. You can shape it.

Stet is free while it's in beta. Founding users lock in founder pricing when paid plans arrive. The deal: use it on real documents and tell me what breaks. The Discord is fastest, email works too.

Download for Mac Join the Discord

macOS build · free in beta · feedback goes straight to me