Passkey registration & authentication — clear developer docs + server SDKs

Many large engineering and security teams struggle to implement passkey registration and authentication reliably: WebAuthn and server-side credential flows are nuanced, platform behaviors vary, and existing documentation is fragmented or tied to specific identity providers. This primarily affects 250,000 enterprises worldwide and mid-market product teams that together represent an estimated $25.0B addressable IAM market (average $100K ACV) where implementation delays create security and product friction. The product would be a focused developer experience offering: crisp, versioned documentation plus enterprise-grade server SDKs (Java, .NET, Node, Python, Go) that implement registration, authentication, key management, migration paths from passwords, test harnesses, and end-to-end sample apps. Bundled options would include hosted control-plane features, integration adapters for common IdPs/SSOs, compliance artifacts, and paid professional services for initial deployments. This opportunity is especially timely because platform vendors (Apple, Google, Microsoft) are standardizing passkey UX and cross-device syncing, accelerating enterprise demand for passwordless solutions; market scoring tools peg this space highly (Market Score 92/100, Revenue Potential 88/100). Enterprises are prioritizing passkeys to reduce credential theft and customer friction, creating a clearer need for turnkey, auditable implementations that reduce time-to-production. To stand out you must deliver measurable developer velocity and enterprise assurance: concise, example-driven docs, battle-tested server SDKs, automated conformance tests, SOC2-type evidence, and SLAs that justify a $100K+ ACV. Honest challenges include medium competition, the need to keep pace with evolving platform specs, and the sales effort required to convince security teams—mitigations are focused case studies, third-party audits, and strong migration tooling.