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

SuperTokens.com

can MSSQL be used? I see doc for MySQL and Postgres

ah ok, is there scope for this in the future?

Yes it is. Until then, You can consider using our managed service instead. And then can migrate to self hosted with mssql when we support it.

ok thank you. do you have an rough ETA for when it could be available?

not really. But sometime next year is when we plan to move to using an ORM like hibernate which will allow us to support it