Visit passkeys website should not replace all your passwords overnight in 2026. The right approach is instead to offer them as the primary sign-in method, while temporarily keeping passwords and two-factor authentication for users who are not ready. Expected gain: less phishing, less suppor related to forgotten passwords, but a project that needs to be seriously scoped on the user experience and security side.
Website passkeys: what really changes for your project
A passkey is a passwordless sign-in key based on FIDO2 and WebAuthn, the web standard used by modern browsers. In concrete terms, your site stores a public key, while the private key remains with the user, on their device or in their passkey manager such as iCloud Keychain, Google Password Manager, Windows Hello, 1Password or Dashlane.
The difference from a password is simple: nothing secret is entered into a form. The user confirms their sign-in with their fingerprint, face, device PIN, or a security key. The site then verifies a cryptographic signature, that is, mathematical proof that the correct private key was used.
For a business leader, the benefit is not theorical. Passkeys significantly reduce the risk of phishing, because the cryptographic identifier is tied to the site’s domain, for example votresite.fr. If a hacker creates a fake sign-in page on another domain, the passkey does not work the way it does on the real site.
In May 2026, the FIDO Alliance estimated the number of passkeys in active use worldwide at 5 billion. That is massive, but it is not universal adoption. The same communication described it as a milestone, not a finish line. In other words: the topic is mature, not magical.
Why passkeys reduce risks without solving everything
The main benefit of website passkeys lies in their resistance to phishing. The NIST, in SP 800-63B-4 published in 2025, reminds us that passwords are not resistant to phishing, whereas FIDO/WebAuthn authenticators are among phishing-resistant MFA methods. MFA means multi-factor authentication: multiple proofs to sign in.
This security comes from the very way WebAuthn works. At each sign-in, the server generates a temporary challenge, called a challenge. The browser sends this challenge to the user’s authenticator, which signs it with the private key. The server then verifies the site’s origin, the RP ID (the service’s identity), the user verification indicators, and the signature.
Put another way, it is not just a more modern button. It is a different sign-in architecture. It limits reused passwords, stolen password databases, phishing attacks, and some of the calls to support.
But it does not eliminate all risks. A poor implementation can create locked accounts, confusing user journeys, or vulnerabilities around account recovery. On the projects we run, we often see that access recovery is less well thought out than sign-up. Yet that is where users panic, especially in B2B.
Replacing passwords: yes, but rarely in a single step
Google still recommends, in its 2025 developer guides, keeping existing mechanisms such as passwords and 2FA during the transition. The reason is pragmatic: not all users understand passkeys, not all environments authorize them yet, and some corporate devices remain locked down by IT.
For an e-commerce site, a client extranet, or a SaaS platform, the safest strategy is gradual. You first add passkeys as an option after a standard sign-in. Then you encourage users to create them. Only then do you highlight them as the default method for compatible users.
The common trap is to believe that “passwordless” means “frictionless.” In reality, the initial passkey registration must be guided: clear messaging, device used, backup method, short explanation. A vague label like “create an access key” can hurt adoption if your audience is not tech-savvy.
A typical case where the obvious solution is the wrong one: imposing passkeys on all clients of a B2B portal from the very first sign-in. If your users sign in from shared workstations, Citrix environments, older browsers, or unmanaged smartphones, you risk shifting the problem to support. At that budget, a guided migration is better than a sudden switch.
Budget, timelines, and trade-offs for a French SMB
The cost depends less on the passkey itself than on your current authentication system. A simple WordPress site with customer accounts, a Laravel application, a Symfony back office, or a React/Node.js platforme do not have the same level of technical debt. Here, the term refers to the accumulated cost of past choices.
To give an honest order of magnitude on the French market, adding passkeys to an existing site often starts around 4,000 to 8,000 euros excluding tax if the authentication system is clean and well documented. For a business application with roles, SSO, mobile, security audit, and recovery scenarios, budgets are more in the 12,000 to 30,000 euros excluding tax range depending on the providers.
Timelines follow the same logic. A proof of concept can be done in one to two weeks. A serious production deployment usually takes four to eight weeks, because browsers, devices, recovery emails, phone loss cases, existing accounts, and security logs all need to be tested.
| Project | Realistic timeline | Estimated budget France | Point of vigilance |
|---|---|---|---|
| Adding passkeys to a simple customer area | 2 to 4 weeks | 4 000 à 8 000 € HT | Browser compatibility and user messaging |
| SaaS platform with roles and 2FA | 4 to 8 weeks | 10 000 à 20 000 € HT | Migration of existing accounts and support |
| Web application + iOS/Android mobile | 6 to 12 weeks | 15 000 à 35 000 € HT | Consistency across WebAuthn, Android, iOS, and recovery |
| Complete authentication overhaul | 8 to 16 weeks | 25 000 € HT and more | Architecture, GDPR, audit, SSO, monitoring |
These amounts do not replace a quote, but they help avoid a misunderstanding: passkeys are not just a plugin to enable. They affect login, and therefore revenue, personal data, and trust. For a low-risk site, the investment can wait. For a customer area handling invoices, HR data, or medical information, the trade-off changes quickly.
What to check before starting the project
Before requesting a quote, map the actual usage. Who logs in? From which devices? How often? With what permissions? An administrator who changes bank coordinate details does not have the same level of risk as an occasional reader of premium content.
Your hosting and security layers also matter. A site behind Cloudflare, with correctly configured TLS, access logs, and anti-bot protection, starts from a stronger foundation than an older application exposed directly. Certificate and encryption questions also tie into broader topics such as SSL certificate migration in the face of post-quantum cryptography.
Here are the criteria to clearly set out before development:
- Define the affected accounts as a priority: administrators, customers, partners, collaborators.
- Plan for a robust recovery method in case a device is lost or an employee leaves.
- Temporarily keep passwords or 2FA for non-compatible cases.
- Test Chrome, Safari, Edge, Firefox, iOS, Android, Windows Hello, and macOS according to your audience.
- Document the processing of personal data under the GDPR, especially connection logs.
- Trorn customer support with simple scripts, because the first questions will be very concrete.
Iframes deserve a word. In 2026, web.dev reminds us that browsers disable WebAuthn by default in cross-origin iframes, that is, embedded from another domain, because of risks such as clickjacking or hidden iframes. If your payment, SSO, or signup flow relies on external integrations, this detail can block the project.
Impact on user experience and conversion
A well-integrated passkey speeds up sign-in. On mobile, the user confirms with Face ID, Touch ID, Android Biometrics, or the device passcode. They no longer have to find a password, wait for an email, or retype an SMS code.
Even so, conversion depends on when you offer the passkey. Asking for it too early can be unsettling. Offering it right after a successful sign-in, with a short sentence like “Sign in faster next time,” often works better. Honestly, this technology is only justified if the flow is simpler than the old one.
The other trade-off concerns brand identity and native interfaces. Passkey creation windows are controlled by the browser or the operating system. You do not control all the design. For a mobile project, this experience must also align with iOS and Android conventions; some interface choices overlap with the thinking behind the adoption of new iOS visual codes on the web.
On the agency side, the instinct is to prototype the flow before coding the entire architecture. Three screens tested with a few real users can sometimes avoid two weeks of poorly oriented development. Simple. But rarely done early enough.
Should you choose an existing solution or develop WebAuthn yourself?
There are two options. You can use an identity provider like Auth0, Okta, Microsoft Entra ID, Firebase Authentication, or Amazon Cognito when it matches your architecture. You can also integrate WebAuthn directly into your backend, with maintained libraries for Node.js, PHP, Python, Java, or Go.
The external solution reduces technical risk and speeds up launch. In return, it adds a recurring cost, vendor dependency, and sometimes rigidity in the experience. In-house development gives more control, but requires real security expertise: server challenge, origin verification, public key storage, counters, revocation, audit.
For an SMB, the decision is rarely made on technical elegance. It is made based on business risk. If authentication is not your differentiator, a recognized provider may be rational. If your platforme manages complex rules, mobile applications and an internal information system, a controlled integration becomes easier to defend.
This choice is often part of a broader reflection on site architecture, frameworks, and operations. Technical trade-offs around JavaScript, for example, can also influence maintenance, as shown by the choice between Bun, Deno, and Node.js for a web project in 2026. And if you’re starting from a complete redesign, scoping with a local web design agency helps connect security, budget, and business goals.
Apple’s passkeys have done a lot to popularize the topic with the general public; for a useful historical reminder, the evolution of the Apple Passkey feature clearly shows how passwordless went from a promise to everyday use.
Defining this type of project upfront avoids most unpleasant surprises: migration choices, user messaging, recovery security, compatibility with existing systems. This is often where an outside perspective saves time, especially when login directly affects revenue or access to sensitive data.
FAQ about passkeys for websites
Will passkeys completely replace passwords in 2026?
Not encrypted for the majority of sites. Passkeys may become the primary method, but keeping a backup sign-in method is still recommended during the transition.
Can a WordPress site use passkeys?
Yes, provided you use a reliable plugin or development adapted to the account system. For a showcase website without a member area, the benefit is limited; for a customer or administrator area, the security gain can be real.
Are passkeys compatible with all browsers?
Modern major browsers support them, including Chrome, Safari, Edge, and Firefox depending on the platforms. You should still test with your actual audience, especially in locked-down professional environments.
What happens if a user loses their phone?
It can recover its passkeys via its Apple, Google, Microsoft account, or its manager, depending on the configuration. Your site must also provide a secure recovery procedure, otherwise the support will become the weak point.
Are passkeys enough to be GDPR compliant?
No. They improre access security, but the GDPR also covers data minimization, retention periods, data subject rights, and documentation of processing activities.