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Netpeak Spider vs Siteliner: catalog facts
Netpeak Spider	Siteliner
Paid Commercial software with a free trial.	Free Free scans are available from the website; account sign-up is optional.
Windows, macOS	Web
Dedicated crawler for technical SEO audits Runs as a desktop application	Finds duplicate content within a site Reports broken links and redirections in the same scan
Paid after the trial Closed source	Web service only, so the site must be publicly reachable Focuses on content and links rather than speed or accessibility
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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