[Moeancurly]

> Is there a market for non-free CLI tools?

Yes, the most popular example I know of is FileBot[0]. It used to be free; it went commercial a short while back. Many people do indeed pay the yearly (or lifetime) subscription for it.

[0]: https://www.filebot.net/

[eb0la]

File compressors were non-free some time ago (Zip, ARJ, etc.) or at least shareware. I guess UPX executable compressor was also non-free.

Other non-free category are media encoders/decoders (with patents behind).

The other cmdline tool I remember it's non-free is tarsnap because there is a service behind.

[dgellow]

Isn’t FileBot a graphical application?

[Moeancurly]

It has a GUI and a CLI[0] option. You need a license to use either.

[0]: https://www.filebot.net/cli.html