Our startup takes a new data approach to transparency and granularity of ESG data to sidestep a lot of the criticisms of greenwashing, and help people understand. I don't think oversimplifying to one metric is an answer for all the people who care about other things (e.g. data privacy, corporate corruption, so many other issues).

We have a little description of our approach at https://www.yourstake.org/info/noscore-esg and we're hiring engineers! If you don't see something that fits you can still send your resume/portfolio to hiring@yourstake.org