Mixed-case
The --mixed-case and -c flag allows you to mix the case of a password, alternating between upper and lower case.
bash
> passfinder company -n passfinder --mixed-case
[...]
PAssFINDER
PAsSfinder
PAsSfindeR
PAsSfindEr
PAsSfindER
PAsSfinDer
PAsSfinDeR
PAsSfinDEr
PAsSfinDER
PAsSfiNder
[...]