head to head · open source
plannotator vs twinny
plannotator has 9,848 GitHub stars, 740 forks, 155 open issues and last shipped yesterday. twinny has 3,689 stars, 239 forks, 48 open issues and last shipped 2 days ago. plannotator leads on adoption by 167% (9,848 vs 3,689 stars). plannotator is written in TypeScript under Apache-2.0; twinny is written in TypeScript under MIT. plannotator has attracted 8% as many forks as stars, twinny 6%. plannotator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (code-review), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| plannotator | twinny | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 3.7K |
| License | Apache-2.0 | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 740 | ⑂ 239 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick plannotator if
- You weight community size — 9.8K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick twinny if
- You want the twinny feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and twinny fits your workflow better
About plannotator
Everything you need to annotate and stay in the loop with your agents Markdown Review • Code Review • HTML Artifacts Annotate plans, specs, markdown, and HTML before implementation. Review diffs and PRs. Send feedback to your agent. Watch the og demo · Installation guide · Official site · Visual HTML Skills · Herdr Annotate Plannotator Plannotator is a local, browser based review surface for AI coding agents: Claude Code, Codex, Copilot CLI, Gemini CLI, OpenCode, Kiro, Droid, Amp, and Pi. It plugs directly into your agent through its hooks and commands. When the agent proposes a plan, html, or finishes writing…
read the full plannotator overview →
About twinny
twinny The AI coding assistant for Visual Studio Code that stays inside your network. Code completion, inline edits, chat, code review and more, on a model server you choose: on your machine, on another of your devices, on a hosted API, or on one gateway your whole team shares. Free, open source, MIT licensed, no telemetry, no sign in. Install from the Marketplace · Documentation · What's new · Changelog · Teams · 中文 · Português (BR) For teams: one gateway on your network serves every developer's VS Code, with a key per person, usage, policy and an admin page. npx twinny server quickstart sets it up. Free for…
read the full twinny overview →
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Frequently asked questions
Is plannotator or twinny more popular?
plannotator has 9,848 GitHub stars and twinny has 3,689. plannotator has the larger community by that measure.
Are plannotator and twinny free?
Both are open source. plannotator is licensed under Apache-2.0 and twinny under MIT. Neither carries a licence fee.
What is the difference between plannotator and twinny?
plannotator is written in TypeScript and twinny in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, plannotator or twinny?
Choose plannotator if you want the larger community (9,848 stars) or its Apache-2.0 licence terms. Choose twinny if its feature set, stack or MIT licence fits better. Both are self-hostable.