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Opera Neon vs Nanobrowser: catalog facts
Opera Neon	Nanobrowser
Paid Offered as a paid subscription.	Free Free and open source; you pay your chosen LLM provider for API usage.
Windows, macOS	Browser extension
Several agents for different kinds of tasks Can read and act on the pages you have open	Runs inside your own browser Bring your own LLM API key
Closed source Agent features depend on online AI services	Needs a paid API key from a model provider Chrome-focused
Downloadable app	Browser extension
Closed source	Open source
License not stated	License not stated
Not stated if an account is 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.