Passwordless authentication is increasingly being recognized as a more secure alternative to traditional password-based systems, which are vulnerable to cyberattacks such as phishing and brute-force attacks. This method eliminates the need for passwords, thereby reducing data breaches, and comes in various forms, including biometric authentication, magic links, one-time passcodes (OTPs), social logins, WebAuthn, and Security Assertion Markup Language (SAML). Each type of passwordless authentication offers unique benefits and challenges, such as the user-friendliness of magic links and social logins, the security of WebAuthn, and the enterprise suitability of SAML. However, issues like email deliverability, network dependency, and the potential for spoofing attacks can present challenges. The adoption of passwordless authentication is driven by its ability to enhance user experience and security, though choosing the right method depends on the specific needs of a given application.