Proof

Proof is an online document editor where humans and AI agents collaborate.

Proof is an online document editor built for agents and humans to collaborate. It lets users track who wrote what, suggest edits, and leave comments. The platform works with AI agents like Claude Code, ChatGPT, Codex, and OpenClaw. Users can create a document with a single click or through the API to get a shareable link. Agents and human collaborators can then review, edit, and reply directly within the document. It is fast, free, and requires no login.

Proof at a glance

Best for: Writer, Product manager, Software engineer
Runs on: Web, API
Pricing: Free
Released: March 2026
Category: AI writing tool
Website: proofeditor.ai

Key features

Line-by-line authorship tracking
Agent and human collaboration
Shareable document links
API document creation
Inline comments and replies
Edit suggestions and tracking

Use it for

Write bug reports, PRDs, and implementation plans
Draft research briefs, growth reports, and copy audits
Create strategy docs, memos, and proposals

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