SuperTokens is an open source authentication solution offering features like: Different types of login: Email / password, Passwordless (OTP or Magic link based).

SuperTokens.com

👋🏼 Does super tokens support B2B easily similar to Auth0?

We have login with SAML, Or any OAuth provider.

You can even build multi tenancy flow with a bit of customisation. But this is something we will work on properly in the coming months

There is a guide for that in the context of SAML.

If you search for the saml docs (in common customisation), you will see about multi tenancy

And you can apply the same logic to other login types