[unsignedint]

Not an apple to apple comparison, but if you are trying to regex with help of software, my daily driver of building regex is RegexBuddy [1]. Not only makes building and testing regular expressions easy, but this pretty much covers all the Regex variants in the wild. (And comes with an excellent help file.)

The same author also make variant called RegexMagic [2] which probably would have closer premise with AutoRegex (less NN part, perhaps) as it is designed to make Regex without too much knowledge of regex, but I don't know how well it works as I haven't used it much...

[1]: https://www.regexbuddy.com/

[2]: https://www.regexmagic.com/

[walls]

regex101 does almost all of this but in the browser!