The company is barely 1 year old and the process of certification can be a bit slow. Other attestations including ISO/IEC 27001, 27017, and 27018 will come later.
We also have a lot of internal practices and policy for how we secure WorkOS while still allowing our engineering team to ship code incredibly fast. It involves separation of duties, hardware security keys (YubiKey), and lots of automation with alerting.
Hopefully we can write something public about it later this year. Many of the ideas came from Stripe's security team. (Thanks Angie! <3)