I’ve been using
Two-Factor Authentication Provider Protectimus for a while now, and I’d say it holds up well against big competitors like Google Authenticator and Authy. One major advantage is their wide range of authentication options—TOTP, push authentication, SMS, and even physical hardware tokens, which add an extra layer of security. Another thing I appreciate is their API and integration support. If you run a business and need to implement 2FA into websites, VPNs, or internal systems, their documentation and tools make it relatively straightforward. They even support RADIUS and SAML protocols, which not all providers offer. As for usability, the interface is clean and intuitive, and users don’t need much technical knowledge to start using it.