If this was an independent review I would take it more serious, but it comes from authy directly.
Serious question tho, can Authy be used on any website that supports Google Authenticator?
There is also microsoft authenticator which supports the same things as Google Authenticator. They just added a backup to onedrive feature too.
Do they support any other backup options? I have no interest in signing up for yet another account, just for one specific app.
Google Authenticator is essentially just RFC6238 - TOTP: Time-Based One Time Password Algorithm.
Yes
https://authy.com/blog/authy-vs-google-authenticator/