Muesli

Muesli is a collaborative Markdown editor for people and AI agents working on the same plain-text documents. It suits teams that want shared review without moving away from .md files. Its strongest case is the combination of live collaboration and agent edits routed through human review.

Overview

Muesli brings live editing, comments, and change suggestions together around Markdown files. That makes it a better fit for collaborative documentation than for someone seeking only a personal writing surface. Documents can use local files or connected storage, and the project is open source under the AGPL-3.0 license.

On the hosted service, document contents remain in storage chosen by the user and are not read, mined, or used for training. The service uses TLS, restricts production access, and keeps audit logs for security-relevant actions. It collects account and session data, audit logs, workspace and document metadata, connected-storage credentials, and transient request data, while running no analytics or third-party trackers.

For more options in the category, see our Markdown editors guide.

Key features

Collaboration and review

Live cursors and presence make concurrent work visible; comment threads and tracked suggestions give teams ways to discuss and propose changes. When a person is present in a document, edits from an AI agent become suggestions for review. That is a useful safeguard for teams using agents, though it adds a review step rather than treating agent edits as automatically accepted.

Guest links support viewer, commenter, and editor roles without requiring collaborators to create accounts. This lets a team involve occasional reviewers while limiting what they can do. Append-only history and snapshots preserve a record of document changes.

Markdown and AI tools

The editor pairs an inline preview with a source toggle, and supports KaTeX math, Mermaid diagrams, editable tables and callouts, wikilinks, and backlinks. These features suit technical notes and linked documentation, not just plain prose. Claude Code, Cursor, Codex, Copilot, and Gemini CLI can contribute through MCP or by editing the file directly.

Storage and self-hosting

Storage options include local files, S3-compatible services such as AWS S3, Cloudflare R2, and MinIO, plus GitHub, Gitea, Forgejo, and Google Drive. Self-hosting uses one Docker image, but durable documents and history require Postgres and Redis. That dependency is a meaningful operational cost for anyone who wants lasting records on their own infrastructure. Sign-in can use an OIDC issuer.

A CLI is available through the maker's shell installer on macOS and Linux, with a Windows ZIP linked from releases. Muesli also supports web, Windows, macOS, Linux, API, and self-hosted use.

Pricing

Muesli is free: its plan costs nothing. The service is currently free, and the software is open source under AGPL-3.0. There is no paid tier or seat or usage cap stated for Muesli, so teams can consider it without a listed subscription charge; self-hosters still need to operate Postgres and Redis for durable documents and history.

Platforms

Muesli supports web, Windows, macOS, Linux, API, and self-hosted deployments. The CLI installer covers macOS and Linux, with a Windows ZIP release.

Who it's for

Muesli is a strong fit for teams writing Markdown together, especially those that want AI agents to contribute while keeping human review in the loop. Its guest roles help bring in reviewers without account setup, and its storage choices suit teams with existing file or repository workflows. It is less compelling for someone who wants a simple solo editor or a self-hosted service without supporting Postgres and Redis.

Pros and cons

• Pro: Agent changes become suggestions when a human is present, giving teams a review point instead of silent direct edits.
• Pro: Guest links offer three access roles without requiring accounts, making limited collaboration practical.
• Pro: Broad storage support and an open-source license give teams options for where documents live.
• Con: Self-hosting durable documents and history requires both Postgres and Redis, adding services to maintain.
• Con: The free offer has no stated paid tier, so teams looking for a priced service plan with explicit support or capacity commitments should compare alternatives.

Alternatives

• Markra is another free option for Linux, macOS, web, and Windows; choose it if you want core features free and can configure a provider for AI features.
• StackEdit is a free, open-source web editor; choose it if web-only access is enough and you prefer an option with no paid plans or usage limits stated by its maker.
• HackMD is a web-based freemium alternative; its free plan is capped at three teammates and includes limits on invitees, templates, GitHub pushes, and image size, so compare those constraints against your collaboration needs.
• Dillinger is a free web option with no signup, paywall, or usage limits; choose it when those constraints matter more than Muesli's team and agent review features.
• PanWriter is a free, open-source desktop option for Linux, macOS, and Windows; consider it if you want a desktop alternative.
• MarkText is free and open source for Linux, macOS, and Windows, with no account or subscription; it suits readers who want a desktop editor without signing up.
• Zettlr is a free desktop alternative for Linux, macOS, and Windows.
• Typora costs $14.99 a month for a full license, with a 15-day free evaluation and activation on up to three devices for one user; choose it if you want a paid desktop license rather than Muesli's collaborative workflow.

Verdict

Choose Muesli if your team wants to work on plain Markdown files together and bring AI agents into the same review process. Its role-based guest access, varied storage integrations, and free open-source plan make that specific workflow attractive. Look elsewhere if you need a solo-first editor or want to self-host without running Postgres and Redis.