Which companies would you take a paycut to join, based on positive contributions

This is prompted by a question from a recent HN posting[0], specifically: "What would you take a pay cut for? What would you work on for free that makes money for someone else?"

I've worked at multiple organizations who, while not exactly "evil", don't really contribute to the overall well-being of society or the planet and who's soul purpose seems to be to make rich people richer.

I'd love to learn of companies who's products/services are a tangible net-good for the planet.

[0] https://news.ycombinator.com/item?id=34824115