Top 9 Passwordless Authentication Methods Ranked for B2B SaaS

The text provides an in-depth analysis of various passwordless authentication methods, emphasizing their varying levels of security, user experience, recoverability, and enterprise compatibility. It highlights the persistent mistake of treating all passwordless methods as equivalent upgrades, noting that some like FIDO2 hardware keys offer robust security against phishing while others, such as SMS OTP, come with significant vulnerabilities like SIM swapping. The analysis ranks nine methods, from SMS OTP, which is noted for its documented vulnerabilities, to IdP-delegated passwordless, which is favored for its comprehensive security and enterprise compatibility. Each method is assessed for its suitability in different contexts, such as consumer apps versus enterprise applications, and underlines the importance of choosing methods based on customer segments, compliance needs, and existing infrastructure. The text also offers practical insights for B2B SaaS product teams on implementing secure authentication without extensive re-engineering, advocating for IdP-delegated passwordless authentication for enterprise clients and passkeys for broader user bases.