Passwords are familiar, but they create work for both users and operators. People forget them, reuse them, and become targets for phishing. Passwordless authentication replaces the memorized secret with another proof, such as a passkey, a one-time link, or a one-time code. For business applications, the right choice depends on device support, recovery needs, and the sensitivity of the actions users can take.
Passkeys and device-bound proof
Passkeys use public-key cryptography. The service keeps a public key while a device or credential manager protects the private key. During sign-in, the authenticator proves possession of the private key for the service's origin. This makes passkeys resistant to many phishing attempts: a fake site on a different origin cannot obtain a valid assertion for the real one. The user may unlock the credential with a local biometric check or device PIN, but the application does not receive the fingerprint or PIN. Support varies across devices and account ecosystems, so test enrollment and use on the browsers your customers actually use.
Links and one-time codes
An emailed magic link can reduce friction for occasional users who already have access to a trusted mailbox. Its security depends on the mailbox and on short-lived, single-use tokens. Be careful when email security scanners automatically open links; a flow that consumes the token on the first GET request can fail before the user clicks it. SMS codes are familiar and accessible on basic phones, but phone numbers can be reassigned and messages can be intercepted or delayed. Rate-limit code requests and verification attempts, and avoid treating SMS as equivalent to a phishing-resistant passkey for high-risk actions.
Enrollment is a security boundary
A passwordless method is only as strong as the process that registers it. If an attacker can add a new passkey after answering a weak support question, the cryptography no longer protects the account. Require a recent authenticated session or another strong proof before adding a credential, changing a phone number, or replacing an email address. Notify the user when a credential is added or removed. Record enough audit information to investigate account takeovers without logging secrets, complete tokens, or sensitive personal content.
Recovery must be designed first
Users lose phones, change employers, and replace devices. A business app needs a safe route back into an account that does not make support staff an easy bypass. Options include multiple registered passkeys, recovery codes stored separately, or an administrator-approved recovery process with clear verification. The more sensitive the account, the more care recovery deserves. Test the experience for a user with only one device and for an organization whose administrator leaves. Document who can approve recovery and how revocation works, because users will judge the system by the day something goes wrong.
Choosing a rollout path
A team does not have to remove passwords overnight. It can offer passkeys as an additional sign-in method, collect data on successful enrollment and recovery, and expand after the support process is stable. Segment users by realistic needs: frequent administrators may value fast passkey sign-in, while a customer who visits once a year may prefer an email link. Provide clear instructions without revealing whether an unknown account exists. Preserve session protections, tenant authorization, and step-up checks for sensitive actions regardless of the initial sign-in method.
Measure the whole experience
Compare failed sign-ins, support requests, account recovery time, and suspected takeover cases, not just how quickly the login form disappears. A method that reduces password resets but doubles lockouts is not an improvement. Verify accessibility and cross-device behavior with real users. For SMBs, the goal is dependable access at a cost the team can support. Passwordless can make a product easier and safer, but only when enrollment, recovery, revocation, and operational monitoring receive as much attention as the sign-in screen.