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Seodisias vs Netpeak Spider: catalog facts
Seodisias	Netpeak Spider
Free The developer says the core crawler and analysis features are free.	Paid Commercial software with a free trial.
Windows, macOS, Linux	Windows, macOS
Checks for more than 30 technical issues Can render JavaScript-heavy pages	Dedicated crawler for technical SEO audits Runs as a desktop application
Windows and Linux builds are not code-signed	Paid after the trial Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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