Free trial: 7 days with 500 KI-Credits, no credit card required. Pro: $20/month ($16.67/month billed yearly) with 2,000 KI-Credits per month. Scholar: $60/month ($50/month billed yearly) with 6,000 KI-Credits per month, team of 6 people included, additional seats $10/person/month. KI-Credit packages
Core Plan: $19/month (200,000 words of editing per month, limited rewriting ability). Pro Plan: $29/month (300,000 words of editing per month, able to rewrite entire chapters and books). A one-time free word sample is available for new accounts.
Key features
PDF and EPUB reader with highlighting and annotations
Automatic source attribution for notes
Support for 10,000+ citation styles including APA, IEEE, GB/T 7714
AI-assisted writing from verified sources
Import from Zotero, BibTeX, and RIS
Import notes from Obsidian Vault and Notion
Real-time collaboration with role-based permissions
Infinite whiteboard for visual thinking and organization
Sentence-level literary feedback
Paragraph-level literary feedback
Passage-level literary feedback in context
Chapter-level literary feedback in context
Book-level literary feedback in entire context
One-click text rewriting with AI
Entire chapter rewriting on Pro Plan
Entire book rewriting on Pro Plan
300,000-word context window on Pro Plan
Progressive learning through interactive Q&A
What makes it different
Unified workflow from reading to submission with traceable source attribution for every statement
Persistent knowledge tree that grows across projects, with AI-powered connection discovery
AI writing that only drafts from user's own verified sources, maintaining research integrity
Repurpose sourced notes into posters, slides, infographics without re-typing
Offline writing with automatic synchronization across devices and team members
Human book editors charge thousands but AI Book Editor starts at $19 per month
Gives almost immediate feedback while human editors take weeks
300,000-word context window three times more than average novel
All output belongs 100% to the user for commercial use