Free: 100 credits at sign-up, topped up by 40 every week, 2 models per rewrite, 4 fast models including GPT-6 Luna, articles up to 6,000 words. Pro: $19 per month, 1,500 credits every month, up to 5 models per rewrite, all 9 models including Claude Sonnet 5.5 and Grok 4.7, articles up to 15,000 word
Free: $0 forever. Starter: $39 per month ($468 billed yearly). Growth: $99 per month ($1,188 billed yearly). Scale: $279 per month ($3,348 billed yearly). All paid plans include a 14-day free trial of Growth. Founding customers: 50% off first year on paid plans.
Key features
Mark passages and add notes about what's wrong
Flip through rewrites from multiple AI models at once
Choose from 9 AI models including GPT-6 Luna, Claude Sonnet, and Grok
Preserve undo history and original drafts
Support for TipTap-based editors and built-in document editor
No need for personal API keys
Credit-based pricing with transparent cost estimates
Handle articles up to 6,000 words on Free plan or 15,000 on Pro
Access 2 models on Free plan or up to 5 on Pro plan
Drafts help centre articles from code
Flags stale articles on merged pull requests
Generates changelog from merged PRs
Publishes API reference without OpenAPI spec
AI answers on help centre
Imports existing documentation
Integrates with Claude and Cursor via MCP
Links claims back to source code
Draft review before publishing
What makes it different
Never leave your editor—rewrites happen in-place without copy-paste
Only the passages you mark change; the rest of your draft stays exactly as written
Compare rewrites from multiple AI models side by side in one click
Free plan with 100 credits and weekly top-ups, no card required
Preserves full undo history even after accepting rewrites
Writes documentation directly from your code, not manual files
Keeps docs accurate by flagging stale articles on each merged PR
Captures real screenshots of your app rather than generic mockups
Generates API reference automatically without an OpenAPI spec
Works with apps built using no-code tools like Lovable, Bolt or v0