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Lumo vs Claude: catalog facts
Lumo	Claude
Freemium Plans are not listed in the research; check Proton's site for current pricing.	Freemium Free tier with usage limits, plus paid subscription plans.
Android, Web	Web
Zero-access encrypted chat history Provider states it does not track or record conversations	Large context window for long documents Strong at coding and analysis
Little public detail on models and limits in the research Requires trusting Proton's privacy claims	Runs only as an online service Free tier has usage limits
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 23, 2026

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