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Altar vs Read AI: catalog facts
Altar	Read AI
Free Free to download; the homepage does not describe paid plans.	Freemium Free for 5 meetings a month with no credit card; paid plans for more.
Windows, macOS	Windows, macOS, Android, iOS, Web, Browser extension
Speaker-labelled, timestamped live notes Searchable knowledge base built from meetings, docs and screen	Real-time transcription and meeting summaries Search across meetings, email, chat and documents
No Linux or mobile apps mentioned Little public information on pricing and where data is processed	Free tier limited to five meetings a month Meeting content is processed in the cloud
Downloadable app	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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