Some companies I'd put on the list:
1) Okta – Single Sign-On as a service
2) Snowflake – Cloud-native data warehouse as a service
3) Crowdstrike – Cloud-native security as a service
1) Okta – Single Sign-On as a service
2) Snowflake – Cloud-native data warehouse as a service
3) Crowdstrike – Cloud-native security as a service
Every other SSO service I've used only worked for certain accounts, or only for first party company accounts, or for specific things. Okta is the SSO that actually does what SSO stands for, and I've been loving it because I don't have to think about it.
Other SSO systems I have used were not entirely SSO.