Passwords are quietly becoming a liability for every product team. Users forget them, reuse them across services, and fall for phishing pages that look identical to the real login screen. For startups building fintech, healthtech, or any product that touches sensitive data, that liability translates directly into support tickets, account takeovers, and lost trust. Passkeys are the industry's answer, and in 2026 they have moved from "interesting standard" to "expected by users."
A passkey is a cryptographic credential built on the WebAuthn and FIDO2 standards. Instead of a shared secret that a server stores (and that a breach can leak), the user's device holds a private key, and the app or website holds only the matching public key. Login happens through the device's biometric sensor or PIN, not a typed string. Apple, Google, and Microsoft have all built passkey support into their operating systems, which means most of your users already carry the hardware needed to use them.
Password-based login is expensive in ways that are easy to overlook during early product development. Every "forgot password" flow needs an email service, a token expiry policy, and a support process for users who get locked out. Every stored password hash is a future liability if your database is ever exposed. And every phishing-resistant login you don't offer is a competitive gap against products that do.
Mavani Solution builds many of its client applications with mobile app development and web platforms that need to earn user trust quickly, particularly in fintech products where account security is a top purchase criterion for enterprise buyers. Passkeys are increasingly a checkbox on security questionnaires during vendor evaluations, not just a nice-to-have feature.
Consider a typical early-stage SaaS product used by finance teams. Its users log in from a laptop during the day and occasionally from a phone while traveling. With password-only login, the team fields a steady stream of reset requests and occasionally sees credential-stuffing attempts from lists leaked on other, unrelated services. For example, a product handling a few thousand monthly active users could see password-reset tickets drop by a large share of previous volume within weeks of adding passkey support, because users who enroll a passkey stop needing resets entirely for that login method. This is an illustrative outcome, not a guaranteed one, since actual results depend on enrollment rates and how aggressively the product nudges users toward passkeys over passwords.
Passwordless is not about removing security, it is about removing the weakest link in the security chain: a secret that a human has to remember and can be tricked into revealing.
A phased rollout tends to work better than flipping a single switch for the entire user base at once. Start by offering passkeys as an optional addition for a subset of users, gather feedback on the enrollment experience, and only then promote it to the default recommended login method for everyone. This lets the team catch confusing copy, unexpected device quirks, or edge cases in the fallback flow while the blast radius of any issue is still small, rather than discovering those problems after every user has already been pushed toward the new flow at once.
The most frequent misstep is treating passkeys as a total replacement for every other security control on day one. A more realistic rollout offers passkeys as the default, encouraged option while keeping a well-secured fallback for the minority of users who cannot yet use them. Teams also sometimes underestimate how much QA time cross-platform testing needs; our own breakdown of startup security mistakes covers similar patterns where security features get shipped without enough testing against real-world device diversity, which ends up creating more support load than it removes.
It also pairs well with other trust-building investments. If your product already does transaction monitoring or anomaly detection, for instance in a fintech context, our piece on AI fraud detection for fintech apps looks at how automated risk scoring and strong authentication work together rather than as separate, disconnected features.
Security expectations are rising from more than one direction at once. Regulators across multiple markets are pushing companies toward stronger authentication for anything touching financial or health data, and enterprise procurement teams are asking pointed questions about credential security during vendor reviews. A startup that can answer "yes, we support passkeys" during a security questionnaire clears that stage of a sales cycle faster than one still explaining a password-reset policy. This does not replace broader compliance work, such as the data protection obligations covered in our guide to India's DPDP Act, but it does close one of the more commonly flagged gaps in a technical security review.
If your product is not yet on a managed identity provider, this is a reasonable moment to evaluate one, since passkey support, session management, and fallback flows are exactly the kind of infrastructure that is expensive to build and maintain correctly in-house. Compare providers specifically on how mature their passkey implementation is, not just whether it exists on a feature list, since early implementations from some vendors have historically had rough edges around cross-device syncing and recovery flows.
From a product standpoint, the visible change is small: a fingerprint or face scan replaces a typed password. But the downstream effects are larger than they first appear. Fewer users get locked out mid-session, fewer support tickets mention "forgot password," and conversion on login screens tends to improve slightly because there is less friction between intent and action. None of this requires users to understand the underlying cryptography; it only requires the enrollment flow to be clear and the fallback path to be reliable for the minority of users on devices that do not yet support passkeys well.
Teams often assume adding passkeys means rebuilding the entire authentication system, which is rarely true. For a typical early-stage product already using a managed identity provider, a working passkey implementation, enrollment flow, and fallback path could realistically take a small engineering team a few sprints to ship, rather than a multi-quarter project. This estimate is illustrative and depends heavily on how much of the app's login logic is centralized versus scattered across custom code; teams with a tangled, homegrown authentication system should budget more time to first consolidate that logic before adding a new credential type on top of it.
Passkeys are one of the rare security upgrades that improve both protection and user experience at the same time, instead of trading one for the other. For startups building products where trust is a purchase decision, whether that is a fintech dashboard, a healthtech portal, or a B2B SaaS tool handling sensitive operational data, passwordless login is becoming table stakes rather than a differentiator. The technical lift is smaller than most teams expect, particularly if you are already using a managed identity provider, and the payoff shows up in fewer support tickets, stronger security posture, and a smoother path through enterprise security reviews.