I was reading from here:
https://www.twilio.com/legal/privacy/authyIf we cannot easily confirm that you are the rightful account holder of the Authy account associated with your old number, we will ask you for your phone account information and a copy of physical identification such as a drivers’ license, national ID, or passport, which we then use to confirm your claim to the account. From time to time, if there are other situations where we need to verify that you are the rightful account holder of your Authy account, our support team may require you to provide identity information like a drivers’ license, national ID or passport.
Emphasis mine. More worrying that just for account recovery, they may also lock you out of your 2FA account (and therefore
all of your online accounts which use 2FA) and demand KYC "from time to time". How reassuring.
When you use an Authy token to log into an account, whether the token was generated on the app or one sent to you via your phone number, we collect and keep information associated with your login activity including information like your IP address, what application or program you logged in to, that you logged in, and when.
They track your activity across all your accounts, linking that to your email address, phone number, and IP addresses...
Over the last year, we have shared Identifiers and Internet or other electronic network activity information with third parties, as we describe in this section.
...and they share it with third parties.
I don't understand the benefit of this service. It is the equivalent of a web wallet for 2FA: You are letting someone else handle all your codes, have the power to lock you out of your accounts, and invade your privacy, all for something you can do yourself easily, freely, securely, and privately.