Pros
The mission of pymetrics is amazing -- removing bias from the hiring process. It's hard not to get behind such a good mission. The people I worked with were great -- all intelligent and motivated. They were also incredibly supportive. They were the reason I enjoyed going into work. Pymetrics has a strong emphasis on learning and growth (including a budget for each employee). Management will let you try things and help you along the way, and everyone will be supportive of you as you learn. There are boundless opportunities for upward mobility, and also opportunities to shift teams. The culture was also incredibly important at pymetrics. There are employee resource groups and also unofficial clubs to join, and there was at least 1 team event every month, ranging from in-office happy hours to offsite retreats. The team tried really hard to make sure that people across teams and departments had a chance to get together and know each other. People are celebrated often. I had a lot of fun working there, learned a lot, and met many incredible people.
Kontras
The benefits could be better (e.g. no 401k matching while I was there, but they were continuously improving their benefits). There's an emphasis on going above and beyond, which can potentially lead to burnout. Work/life balance can be good, but you have to set those boundaries. (No one will fault you for leaving at a reasonable hour, but many people stay on the later side so you might feel guilty).