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OpenRead vs Avidnote: catalog facts
OpenRead	Avidnote
Freemium Free tier available, with a paid Pro plan.	Freemium Sign-up is free to start, with paid plans listed on its pricing page.
Web	Web
Search across more than 300 million papers Compare several papers to spot agreements and contradictions	Paper and notes shown side by side Ask questions, summarize and proofread uploaded documents
Web only, no desktop app Advanced features sit behind the Pro plan	Web only, with documents uploaded to the service AI-generated text needs careful checking before academic use
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.