In Berlin, there is the 'Social Impact Hub'
of which I am not affiliated with nor won't endorse here in any way. Sadly, in Germany at least, startups that aim for maximum positive impact and less so profit, are called 'social startups' which outside of Germany probably has a completely different connotation.
The news websites I usually frequent, are not very full of news; they are rather SV & VC company theory megaphones. Avoiding those websites sometimes leads one to people with a bit different entrepreneurial mindset.
This having said, would you work for such a company? And which compromises would you accept (on the ethics-, but also wage-scale)?