TOTP-Authenticator

This bot's own profile states its function precisely: "A telegram bot which issues TOTP codes for two-factor authentication." TOTP (Time-based One-Time Password) is the standard behind apps like Google Authenticator and Microsoft Authenticator — a six-to-eight-digit code that changes every 30 seconds, generated from a secret key shared between the service and your authenticator when you first enable 2FA.

Putting that function into a Telegram bot instead of a dedicated app has one clear appeal: one fewer app to install and switch to when logging in, since you likely already have Telegram open. It is a genuinely different category from the password generators in this list — this is about the second factor of login, not the password itself.

The trade-off is concentration of risk: a dedicated authenticator app usually isn't tied to an account you also use for messaging and isn't a juicy single target the way "everyone's 2FA secrets in one Telegram bot" could be if the bot's own security were ever compromised. Weigh that against the convenience, and consider it primarily for lower-stakes accounts rather than your most sensitive ones (banking, primary email) unless you've reviewed how it stores your TOTP secrets.