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regex101 vs Wildcard: catalog facts
regex101	Wildcard
Freemium Free to use, with a paid Pro upgrade and enterprise option.	Free Free and open source under the GPL-3.0-or-later licence.
Web	Linux
Plain-language explanation of a pattern as you type Supports PCRE2, JavaScript, Python and other flavors	Works offline unlike web regex testers Native GNOME interface
Requires a browser and internet connection Some features require a Pro upgrade	Linux only Little published detail on supported regex flavours
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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