A workspace for reading articles, PDFs, videos and podcasts with AI explanations and cross-source questions
Professional Windows software for editing CSV files with sorting, filtering, charting and data manipulation tools
Stage
Startup
Established
Founded
2026
1998
Based in
US
US
Pricing model
Freemium
Paid
Pricing
Free plan with 100 comprehension units/month. Pro $9/month with 300 units. Premium $19/month with 600 units. Scholar $39/month with 1,200 units. Annual billing saves 17%: Pro $90/year, Premium $190/year, Scholar $390/year. Unit packs from $10 for 200 units.
$29 USD
Key features
Clean reading view for articles, PDFs, podcasts, videos and newsletters
Inline explanations for difficult passages written from surrounding context
Cross-source question answering with citations
Structural navigation showing key moments and density maps
Connected note-taking tied to source passages
Natural voice narration for listening
Notebook feature for gathering related sources with notes and questions
Discover shelf suggesting rights-cleared reading related to your library
Course builder to create lessons from saved documents
Integration with ChatGPT and browser extensions for Chrome and Firefox
Data visualization as graphs, histograms and pie charts
Import databases and Excel spreadsheets
Search and replace with regular expressions
UTF-8 and UTF-16 support with unicode characters
File encryption and password protection
Deduplicate rows and split/combine columns
Drag and drop interface for rows and columns
What makes it different
Explanations stay beside the source instead of requiring you to leave to look up terms
Questions cite specific passages from sources so answers are traceable
Notes automatically stay attached to the passages that prompted them
Works with PDFs, videos, podcasts and articles in one unified workspace
Professional CSV editor purpose-built for Windows with extensive data manipulation features
Data visualization capabilities with graphs, histograms and pie charts
Comprehensive text editing tools including spell checking and macros
Advanced filtering with search engine queries and conditional expressions
Omphalis
CSV Editor Pro