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Altar vs Cluely: catalog facts
Altar	Cluely
Free Free to download; the homepage does not describe paid plans.	Freemium Pricing is not shown on the homepage.
Windows, macOS	Windows, macOS, iOS
Speaker-labelled, timestamped live notes Searchable knowledge base built from meetings, docs and screen	Real-time answers and follow-up suggestions during a call Can use what is on your screen as context
No Linux or mobile apps mentioned Little public information on pricing and where data is processed	Marketed as undetectable, which may conflict with meeting or interview policies Pricing and supported desktop systems not detailed on the homepage
Downloadable app	Downloadable app
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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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