Compare software

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

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