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Pi vs Sesame: catalog facts
Pi	Sesame
Free Sign-up is free; the research does not mention paid plans.	Free The homepage shows no price for the app.
Web	Android, iOS
Conversational tone suited to talking things through Runs in the browser with nothing to install	Voice-first conversation with natural-sounding speech Apps for both iOS and Android
Can make factual mistakes Aimed at conversation more than research or coding work	No desktop or web version listed Little detail published about features and pricing
Web application	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
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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