Passwordless for B2C at scale sounds straightforward in 2026 because every major CIAM now exposes WebAuthn APIs and markets passkeys as a standard feature. But the guide I’m referencing here looked specifically at 500k+ MAU deployments and makes a less comfortable point: enabling passkeys is not the same as driving passkey adoption.
That gap shows up fast in production. Teams launch passkeys, but daily logins still run through passwords or SMS OTP. According to the guide, CIAM-native passwordless rollouts usually stall at a 5–10% passkey login rate. The structural reason is simple: the CIAM can store credentials and run policy, but it usually does not control the prompt logic, device segmentation, recovery design, or client-side telemetry needed to move users into passkey-first behavior.
This is the passkey adoption fallacy in practice. “Our platform supports passkeys” is a feature statement. “We reached 60%+ passkey login rate” is an orchestration outcome.
The passkey adoption ladder matters more than the vendor
One of the most useful ideas in the guide is the passkey adoption ladder. It reframes rollout maturity as a journey design problem, not a platform selection problem.
