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Otter.ai vs Altar: catalog facts
Otter.ai	Altar
Freemium Free starting plan, with paid and enterprise plans on the pricing page.	Free Free to download; the homepage does not describe paid plans.
Windows, macOS, Android, iOS, Web	Windows, macOS
Live transcription with speaker recognition Automatic summaries and action items after meetings	Speaker-labelled, timestamped live notes Searchable knowledge base built from meetings, docs and screen
Recordings and transcripts are processed on Otter's servers Requires an account	No Linux or mobile apps mentioned Little public information on pricing and where data is processed
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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.