问题
How does http://auth0.com's authentication features compare to Firebase's authentication?
Does Auth0.com, on the Free or Silver plan, provide any authentication features that Firebase does not provide?
回答1:
I had to evaluate both firebase and Auth0 for a client. This blog basically outlined things you should consider as you compare those two authentication providers. Link Because in the end, its not just "features" that determine which authentication provider you should use. It's what you want out of them.
As for 2FA from Auth0, they force you to use Twilio. I believe there's no way to change the 2FA providers unless you implement your own 2FA hooks.
回答2:
One major difference between the two (not mentioned in the blog linked in Jake's answer) is pricing. Auth0's pricing increases pretty quick along with the number of active users (source) whereas Firebase Auth is free to use; you only pay for optional features like SMS, and database usage in case you need to store additional user metadata.
See this question for more about Firebase Auth pricing.
来源：https://stackoverflow.com/questions/34827628/what-is-the-difference-between-firebase-auth-and-auth0-authentication