Ask HN: Profitable SaaS or tech companies doing “good” things

All companies claim to be doing “good” but I want to start a discussion around some that are actually “fighting the good fight” and making money by providing a service of some kind. The mission doesn’t have to be grandiose “curing cancer” or “fixing US healthcare”, could be as small as helping provide online privacy, education focused, etc. Entirely subjective, thanks.