Authy is a two-factor authentication (2FA) app that enhances the security of online accounts. It generates time-based one-time passwords (TOTPs) that users enter alongside their regular passwords. This extra layer of security helps protect accounts from unauthorized access, even if someone has stolen a password. The app is available on various platforms, including smartphones and desktops, making it convenient for users. Authy also offers features like backup and multi-device support, allowing users to access their 2FA codes from different devices. This ensures that users can securely log in to their accounts anytime, anywhere.