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Opera Neon vs HARPA AI: catalog facts
Opera Neon	HARPA AI
Paid Offered as a paid subscription.	Freemium Free to install, with paid plans for heavier use of hosted models.
Windows, macOS	Browser extension
Several agents for different kinds of tasks Can read and act on the pages you have open	Works with many AI providers and local models YouTube, PDF and page summaries in place
Closed source Agent features depend on online AI services	Mainly a Chrome extension Hosted models send page content to third-party AI providers
Downloadable app	Browser extension
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 September 23, 2026

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