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Perplexity vs iAsk.ai: catalog facts
Perplexity	iAsk.ai
Freemium Free to use, with a paid Pro tier for more advanced search.	Free Described by its developer as free to use.
Web	iOS, Web, Browser extension
Answers include citations to sources Follow-up questions keep context	Answers include citations Adjustable response length and several modes
AI answers can still misread or misstate sources Advanced features sit behind a paid tier	Oriented towards student homework questions Needs an internet connection
Web application	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 26, 2026

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