Plannotator
Free, local-first plan and code review for AI coding agents.
Plannotator earns a spot in your toolkit if you use Claude Code, Codex, or similar plan-mode agents. It's the missing review layer—free, local, and genuinely useful. The catch: Workspaces (team sharing) is waitlist-only, so large-team collaboration waits. For solo devs or small teams, it's the best way to stop rubber-stamping agent plans and actually own what ships. If you need hosted team review today, look at CodeRabbit or Greptile.
Verified 4d ago · liveness 77/100 · cite: rightaichoice.com/tools/plannotator
- Developers using plan-mode AI coding agents who want structured approval before execution
- Teams collaborating on agent-generated code review with diff-based feedback
- Users of Claude Code, Codex, OpenCode, Pi seeking a better review UX than terminal
- Privacy-conscious developers wanting local-only plan review without data leaving the machine
- Users who want a hosted SaaS with user accounts today (Workspaces is waitlist-only)
- Developers not using terminal-based coding agents (e.g., pure IDE or chat-only tools)
- Teams needing multi-agent orchestration or complex workflow automation
We scan live Reddit threads, YouTube comments, X posts, G2 reviews and other communities — and hand you an honest verdict in under a minute.
- Honest verdict, not marketing
- Real pros & cons from real users
- Attributed quotes with receipts
3 free scans · no card needed
Skip Plannotator if you don't use a terminal-based coding agent with plan mode (like Claude Code or Codex), or if you need hosted team collaboration today since Workspaces is waitlist-only.
Workspaces (team sharing) is waitlist-only, so you can't pay to unlock it today—you'll wait for team features.
Plannotator is free and open source, making it ideal for solo devs and small teams who want to keep costs at $0. It's cheaper than hosted alternatives like CodeRabbit (paid plans) or Greptile (paid plans), but those offer hosted collaboration out of the box. If you need team features now, budget for a paid tool.
In short
Plannotator — Free, local-first plan and code review for AI coding agents. Best for Developers using plan-mode AI coding agents who want structured approval before execution, Teams collaborating on agent-generated code review with diff-based feedback, Users of Claude Code, Codex, OpenCode, Pi seeking a better review UX than terminal. Free to use.
What people actually say about Plannotator — is it worth it?
We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.
61 mentions across 5 sources (Hacker News, YouTube, Product Hunt, GitHub, Lemmy) · researched Aug 13, 2026.
- +Local-first and open source, ensuring privacy and no vendor lock-in.
- +Inline annotation of plans and diffs improves feedback ergonomics vastly.
- +Plan diff view shows changes between agent iterations clearly.
- +Structured feedback export integrates seamlessly back into agent sessions.
- +Supports multiple agents: Claude Code, Codex, Copilot, OpenCode, and more.
- −Browser auto-open fails intermittently for some users.
- −OpenCode Beta desktop lacks plan mode annotation support.
- −Windows install script fails on PowerShell, blocking setup.
- −Hosted team features (Workspaces) are waitlist-only, not available yet.
- −Some users report confusion when submit_plan doesn't appear.
- • No hidden costs for the free tier, but the hosted team layer is not yet available
- • Potential paid version mentioned by the author on Hacker News, but no details yet
Viability Score
How well maintained and how widely used is Plannotator? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: August 2026
How we score →Key Features
- Inline plan annotation with comments, deletions, replacements
- Side-by-side and unified diff view for code review
- File tree navigation for multi-file diffs
- Line-level code annotations with suggestions
- Version history with diffs between plan iterations
- Draft auto-save for crash resilience
- Encrypted sharing via self-contained URLs
- Structured feedback export to AI agents
- Automatic hook into agent plan step
- Slash commands: /plannotator-annotate, /plannotator-review, /plannotator-last
- Annotate URLs and HTML files
- GitHub and GitLab PR review by URL
- Denial history analysis for prompt improvement
- Runs locally (plans never leave machine)
- Open source (MIT/Apache 2.0)
About Plannotator
Plannotator is a free, open-source, browser-based workspace for reviewing, annotating, and approving plans and code diffs generated by terminal-based AI coding agents like Claude Code, Codex, Copilot, and OpenCode. Instead of squinting at terminal text, you get a proper review surface with inline annotation tools, side-by-side and unified diff views, file tree navigation, and version history—all running locally on your machine. Your feedback exports as structured output the agent understands, closing the loop so you stay in control of what gets built. Plannotator hooks into your agent's plan step automatically, so you can annotate inline, mark deletions, add comments, or write replacements. The same workflow applies to code review: run /plannotator-review to get a PR-style diff viewer for uncommitted changes, with line-level suggestions and staging options. Version history tracks every revision, with diffs between versions, and draft auto-save ensures your annotations survive crashes. It integrates with agents that support plan mode plus editors like VS Code, Obsidian, and Bear. You can also review GitHub and GitLab pull requests by URL. The local plugin is free and open source (MIT or Apache 2.0), with no telemetry or analytics. A hosted team layer called Workspaces is on waitlist; the core tool remains local-first for privacy. Install via curl, then use slash commands like /plannotator-annotate, /plannotator-review, and /plannotator-last. Recent updates extend annotation to URLs and HTML files, and add denial history analysis to help improve your agent prompts. Unlike many AI tools that are hosted SaaS only, Plannotator is fully local by default, free, and open source—a strong pick for privacy-conscious developers and teams avoiding vendor lock-in. Just note: shared multi-user features (Workspaces) are waitlist-only, so if you need that today, you'll wait.
Behind the Verdict
Plannotator fills a real gap: the terminal-based coding agent workflow forces you to approve plans and review diffs in cramped terminal output. Plannotator gives you a proper browser-based review surface with annotations, diffs, and version history—all local. The install is a one-liner, and it hooks into your agent's plan step automatically, so you get a 'deny with feedback' flow instead of blindly accepting. The code review command (/plannotator-review) applies the same discipline to uncommitted changes, with PR-style diff viewing and line-level suggestions. Strengths: Local-first means your plans never leave your machine—no telemetry, no analytics, fully open source (MIT/Apache 2.0). The structured feedback export means the agent actually understands your annotations, cutting the copy-paste loop. Version history and draft auto-save are reliability wins. The integrations list covers the main agents (Claude Code, Codex, Copilot, Gemini, OpenCode, Pi) and editors (VS Code, Obsidian, Bear). Being browser-based with a CLI means it works cross-platform. Weaknesses: The team layer (Workspaces) is waitlist-only, so if you need shared review history today, you're out of luck. There's no native mobile app, so it's desktop/browser only. The tool is niche—it only makes sense if you already use a terminal-based coding agent; if you're IDE-only or chat-based, it won't add value. The dependency on the agent's plan mode means it works best with those that support that hook. Where it fits: solo developers, small teams, privacy-conscious shops, and open-source enthusiasts who want to stay local and avoid vendor lock-in. Where it doesn't: large enterprises needing hosted collaboration, teams that need multi-agent orchestration, or anyone who doesn't use plan-mode agents. Overall, Plannotator is a solid, free tool that respects your privacy and improves agent workflow. The waitlist on Workspaces is the main friction point.
Researching Plannotator? Get your full AI stack in 60 seconds.
Free, no signup — tell us your goal and get tools matched to your budget & existing stack.
Real-world workflow fit
Concrete scenarios for the personas Plannotator actually fits — and what changes day-one when you adopt it.
You run Claude Code and it proposes a plan. Plannotator intercepts the approval step, showing the plan in a browser-based review surface.
Outcome: You annotate inline, mark a section for deletion, and approve with structured feedback. The agent revises based on your exact comments, without copy-pasting.
A teammate runs /plannotator-review on uncommitted changes. You get a PR-style diff viewer with file tree navigation.
Outcome: You add line-level suggestions and stage/unstage files, then commit with confidence. The review is documented as version history for the team.
You need to review a plan but don't want it sent to a cloud service. Plannotator runs locally, so the plan never leaves your machine.
Outcome: You annotate and share an encrypted short link if needed, but all data stays local. You maintain full control over your IP.
Use Cases
- Review and annotate a Claude Code plan before allowing execution, marking sections to delete or replace.
- Audit an agent's uncommitted code changes with a PR-style diff viewer and suggest inline fixes.
- Share a plan review URL with a teammate so they can add annotations before the agent proceeds.
- Automatically capture feedback patterns from denied plans to improve future agent proposals.
- Annotate a web page or local HTML file via URL and send structured feedback to a coding agent.
- Track every version of a plan and compare revisions with visual diffs during iterative agent sessions.
Limitations
- Plannotator is a free, local-first tool for plan and code review that runs locally, with review data staying local by default and no usage telemetry or analytics.
- It natively integrates with coding agents such as Claude, Codex, Copilot, Gemini, and others, but relies on the agent supporting plan mode or diff review hooks where supported.
- The hosted Workspaces product is listed as 'soon' in the evidence.
as of 2026-08-19
Verification history
We have re-verified Plannotator 6 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
- — re-verified summary, description, our verdict, our analysis, pricing model, pricing tiers, features, integrations, who it suits, who should skip it
Free to cite with attribution — this page re-verifies continuously.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Plans compared
For each published Plannotator tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Local Plugin
$0/mo
Ideal for
Solo developers and small teams who want free, local, privacy-friendly plan and code review for AI agents.
What this tier adds
The free, open-source starting tier with all core features: annotations, diff viewer, version history, integrations.
Workspaces
Waitlist (TBD)
Ideal for
Teams needing shared plan history, collaboration, and verification standards—currently on waitlist.
What this tier adds
Adds hosted team layer with shared plans, review history, and integrations; pricing TBD.
Where the pricing makes sense
The company stage and team size where Plannotator's pricing actually pencils out — and where peers do it cheaper.
Plannotator is free and open source, making it ideal for solo devs and small teams who want to keep costs at $0. It's cheaper than hosted alternatives like CodeRabbit (paid plans) or Greptile (paid plans), but those offer hosted collaboration out of the box. If you need team features now, budget for a paid tool.
Setup time & first value
How long it actually takes to get something useful out of Plannotator — broken out by persona, not the marketing-page minute.
Install with one curl command: `curl -fsSL https://plannotator.ai/install.sh | bash`. First value within minutes: annotate a plan from your agent. For code review, run /plannotator-review on any uncommitted diff. Full setup, including agent hooks and editor integrations, takes under 15 minutes.
Switching to or from Plannotator
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From terminal-only review: Install Plannotator and use slash commands—no migration needed, it complements your existing agent workflow.
- →From CodeRabbit or similar: Export your review history if needed, then start using Plannotator for local reviews. No lock-in due to open-source.
- →From manual copy-paste: Start using /plannotator-annotate to send structured feedback directly to your agent.
- ↗To CodeRabbit or Greptile: Export your annotated plans as markdown or structured feedback, then import into the new tool if supported.
- ↗To a pure IDE-based workflow: Your annotations are in local files, so you can manually transfer or keep them as reference.
- ↗To a hosted team solution: Move your review history to the new platform; since Plannotator stores locally, you have the files.
Integrations
Resources & Guides
- Documentationplannotator.ai
Docs · Plannotator
Full product docs from plannotator.ai
- Quickstartplannotator.ai
Quickstart · Plannotator
Get up and running fast from plannotator.ai
- Documentationplannotator.ai
Security · Plannotator
Full product docs from plannotator.ai
- Documentationplannotator.ai
Claude Code · Plannotator
Full product docs from plannotator.ai
- Documentationplannotator.ai
Opencode · Plannotator
Full product docs from plannotator.ai
- Learnplannotator.ai
Learn · Plannotator
Educational content from plannotator.ai
Tutorials & Learning
Official links
Tools that pair well with Plannotator
Common stack mates teams adopt alongside Plannotator, with the specific reason each pairing earns its keep.
Featured Head-to-Head Comparisons
Plannotator vs Voyage Ai
Voyage AI and Plannotator serve entirely different needs: Voyage is an enterprise embedding platform for RAG pipelines, while Plannotator is a free, local review tool for AI coding agents. Choose Voyage if you need domain-specialized embeddings for search/retrieval at scale; pick Plannotator if you're a developer wanting to visually annotate agent plans and diffs before execution.
Plannotator vs Spider Cloud
Plannotator and Spider Cloud serve fundamentally different needs. Plannotator is ideal for developers who want a rich, privacy-focused UI to review and annotate plans and diffs from AI coding agents. Spider Cloud excels at high-volume web scraping and data extraction for AI pipelines. Choose Plannotator if your bottleneck is agent plan quality and approval workflow; choose Spider Cloud if your team needs reliable, scalable web data to feed LLMs or RAG systems.
Plannotator vs Temporal Ai
Plannotator and Temporal AI solve entirely different problems. Plannotator is a lightweight, free, privacy-focused tool for reviewing agent-generated plans and diffs before execution — ideal for solo developers using terminal-based coding agents. Temporal AI is a heavyweight durable execution platform for orchestrating complex, fault-tolerant AI workflows at scale. Most users will need one or the other, not both. If your bottleneck is reviewing agent output, choose Plannotator. If your bottleneck is reliability and state management across distributed agent steps, choose Temporal AI.
Plannotator vs Shipixen
If you're deep into AI coding agents like Claude Code or Codex and need a visual review layer for plans and diffs, Plannotator is a must-have—and it's free. If you're shipping a product fast and need a polished Next.js landing page with zero design fuss, Shipixen saves hours with its theme library and one-click deploy. They solve entirely different problems.
Alternatives to Plannotator
View all
Cursor for iOS
Launch AI coding agents, review PRs, and ship code from your iPhone with Cursor for iOS.
Frequently Asked Questions
Categories
Used Plannotator? Help shape our editorial sentiment research.