A macOS Markdown editor built by Drew Raines. Instead of letting an AI agent overwrite your Markdown files directly, Stet catches each change as a proposal and waits for you to approve it, reject it, or revise it before it becomes final. It works on plain, unencrypted Markdown files on your own machine, so there are no API keys or dedicated integrations to set up ─ any AI agent that can write files will do. The first version shipped in May 2026, and the latest release as of August 2026 is 0.7.0.
Key Features
- Approve, reject, or revise each change: Every edit the agent made appears as a diff, and you choose on the spot whether to keep it, roll it back, or adjust it yourself. The design treats AI as a co-author rather than a tool that hands you a final draft
- Review strictness set per folder: Three levels ─ a manual mode where every change waits, a hybrid mode where routine fixes pass automatically while significant ones are held, and an automatic mode where changes land right away but stay marked ─ and you can pick a different one for each folder
- Detection that separates significant edits from rewording: Minor rephrasing is distinguished from higher-impact changes such as altered numbers, reversed negations, and deletions, so you can review the riskiest edits first (strengthened in 0.7.0)
- Instructions written in the document, plus one-click handoff: Write a note where you want a change and the agent picks it up and returns a revised proposal. A “Send to AI” button hands the whole document over
- Version history and restore: Track how a document evolved and roll it back to an earlier state
- Sharing and comments (Stet Sync): Share a document, request a review on the web, and work through comment threads and approvals. An experimental Google Drive integration is also available
Pricing
| Plan | Monthly price | What’s included |
|---|---|---|
| Free | $0 | One workspace; Stet Sync limited to 10 documents / 10 MB |
| Writer | $5 (founding member rate; $10 normally) | Unlimited workspaces, 1 GB storage |
| Team | Contact for pricing | More storage, centralized billing |
Pricing is as of August 2026. Check the official site for the latest.
Pros & Cons
✅ Pros
- Changes from the AI never land silently, so it is easier to catch facts and numbers being swapped out
- It works on local Markdown files as they are, so you are not locked into one AI service, and no API key registration is needed
- Review strictness can differ per folder, letting you run drafts and near-final manuscripts under different rules
- The core review workflow can be tried on the free plan
⚠️ Cons
- macOS only ─ no Windows, Linux, or mobile support
- Still at version 0.7.0 and under active development, so features are added and changed quickly
- The free plan’s sharing limit (10 documents / 10 MB) is small, so team use effectively requires a paid plan
- Not suited to working directly with formats other than Markdown, such as Word or Google Docs files
Comparison with Similar Services
| Criterion | Stet | Obsidian | Cursor | Google Docs |
|---|---|---|---|---|
| Main purpose | Reviewing AI edits | Local Markdown note-taking | AI editing centered on code | Collaborative editing / suggestions |
| File format | Local Markdown | Local Markdown | Files in a repository | Proprietary cloud format |
| Approving AI changes | Every change reviewed three ways | Not a built-in feature | Approve or reject code diffs | Human suggestions mainly |
| Platforms | macOS | Windows/Mac/Linux/mobile | Windows/Mac/Linux | Browser |
| Pricing | Free to $5/month | Free for personal use | Free tier / paid plans | Free to paid |
Who Is It For
- Writers who want AI to polish or update a manuscript but worry about facts and figures being changed without notice
- People developing specs, meeting notes, or procedures alongside AI, where accuracy matters
- Anyone switching between several agents such as ChatGPT and Claude who does not want an editor tied to one service
- Mac users who keep their writing in Markdown and want to follow the change history as they finish a piece
Summary
Stet offers a middle path between accepting whatever the AI wrote and rereading the whole document every time: you look only at what changed, in order of importance. Because it simply works with local Markdown, it is easy to adopt and pairs with any AI agent. It is macOS-only and still young at version 0.7.0, so the sensible start is the free plan with a single document of your own, to see whether the review flow fits how you write.