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Chai vs HammerAI: catalog facts
Chai	HammerAI
Freemium Free to download, with revenue from paid use inside the app.	Freemium Chat is free with local and cloud models; paid plans are listed on the pricing page.
Android, iOS	iOS, Web
Large catalog of community-made characters Users can create their own characters and stories	Local models through Ollama in the desktop app Messages stored only on your computer by default
Mobile only Aimed at entertainment and companionship, not productivity	Focused on roleplay rather than general productivity Desktop platforms supported are not stated on the homepage
Downloadable app	Downloadable app, 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
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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