head to head · open source
plannotator vs flow-next
plannotator has 9,838 GitHub stars, 737 forks, 155 open issues and last shipped yesterday. flow-next has 716 stars, 63 forks, 6 open issues and last shipped 2 days ago. plannotator leads on adoption by 1,274% (9,838 vs 716 stars). plannotator is written in TypeScript under Apache-2.0; flow-next is written in Python under MIT. plannotator has attracted 7% as many forks as stars, flow-next 9%. plannotator was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (claude-code, code-review, codex), 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 | flow-next | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 716 |
| License | Apache-2.0 | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-04 | 2026-11-03 |
| Forks | ⑂ 737 | ⑂ 63 |
| 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 flow-next if
- You want the flow-next feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and flow-next 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 flow-next
Flow Next Agents generate. flow next proves. Implementation got cheap. Reviewing it, verifying it, and keeping a codebase coherent did not. Flow Next is a workflow plugin that runs inside your coding agent. Give it the change you want and the rules your project follows. It turns that intent into specs, implementation, review, and pull requests with evidence. Your specs, decisions, and task state live in your repository. A real recorded run: plan, then cross model plan review (catches a missing guard, fix, SHIP), then implement plus tests, then impl review SHIP, ending on the receipt. Nothing staged; every frame…
read the full flow-next overview →
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Frequently asked questions
Is plannotator or flow-next more popular?
plannotator has 9,838 GitHub stars and flow-next has 716. plannotator has the larger community by that measure.
Are plannotator and flow-next free?
Both are open source. plannotator is licensed under Apache-2.0 and flow-next under MIT. Neither carries a licence fee.
What is the difference between plannotator and flow-next?
plannotator is written in TypeScript and flow-next in Python. 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 flow-next?
Choose plannotator if you want the larger community (9,838 stars) or its Apache-2.0 licence terms. Choose flow-next if its feature set, stack or MIT licence fits better. Both are self-hostable.