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Khoj vs PaperQA2: catalog facts
Khoj	PaperQA2
Freemium Free to self-host; the hosted service has free and paid plans.	Free Free and open source under the Apache 2.0 licence; model API usage may cost extra.
Web, Self-hosted	Command line
Searches and chats over your own documents Works with local or remote language models	Answers include citations to the source documents Fetches paper metadata with citation counts and retraction checks
Self-hosting takes some setup work The company now spreads its effort across several products	Needs a language model, either through an API or run locally Setup and tuning assume comfort with Python
Web application, Self-hosted, Hosted service	Downloadable app
Open source	Open source
License: AGPL-3.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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