Teams should compare the full lifecycle cost, not just the initial delivery cost. A build decision is only defensible if the organisation can maintain compatibility, support diverse environments, and absorb future FIDO and WebAuthn changes without creating brittle dependencies or major rework.
Why This Matters for Security Teams
Passkeys are often positioned as a straightforward replacement for passwords, but the build-versus-buy decision is really about operating model, not just authentication UX. Teams that underestimate lifecycle work usually discover that browser compatibility, device binding, recovery flows, sync behaviour, and enterprise policy enforcement create long-term maintenance obligations. That makes the choice similar to any identity control decision: the hidden cost is rarely the first release, it is ongoing support and change management.
This matters because passkeys are becoming part of the broader identity perimeter, where implementation quality affects phishing resistance, help desk volume, and account recovery risk. The NIST Cybersecurity Framework 2.0 frames identity as an enterprise governance issue, not a point solution. NHI Management Group’s Ultimate Guide to NHIs is relevant here because it shows how identity weaknesses become operational failures when lifecycle ownership is unclear. In practice, many security teams discover the true cost of “simple” authentication after help desk load, edge-case recovery, and cross-platform breakage have already accumulated.
How It Works in Practice
Teams should evaluate passkeys infrastructure across four dimensions: platform reach, recovery, governance, and lifecycle ownership. A buy decision usually makes sense when the organisation wants faster rollout, lower maintenance burden, and a clearer path to future WebAuthn changes. A build decision is only defensible when the organisation has deep identity engineering capability and a strong reason to own the full trust chain end to end.
In practice, the biggest differentiators are not the authentication ceremony itself but the surrounding controls:
- Compatibility across browsers, operating systems, managed devices, and BYOD environments.
- Recovery and account rebind flows that resist social engineering and help desk abuse.
- Policy enforcement for phishing-resistant sign-in, device trust, and step-up requirements.
- Auditability for enrollment, credential change, revocation, and dormant account cleanup.
Current guidance from identity and zero trust practice suggests that passkeys should fit into a broader control plane, not sit as a standalone front-end feature. For teams assessing architectural ownership, NIST Cybersecurity Framework 2.0 helps anchor the governance view, while NHI Management Group’s Ultimate Guide to NHIs is a useful reminder that identity controls fail when lifecycle processes are bolted on after deployment. Teams should also look at whether their architecture can absorb future FIDO and WebAuthn changes without forcing application rewrites or custom browser handling. These controls tend to break down in highly fragmented device estates because recovery, enrollment, and policy enforcement become inconsistent across user populations.
Common Variations and Edge Cases
Tighter control over passkeys often increases rollout and support overhead, so organisations must balance stronger security against user diversity and operational complexity. That tradeoff is most visible when executives want phishing resistance quickly, but product and help desk teams inherit the complexity of legacy authentication, mobile device drift, and regulated recovery requirements.
There is no universal standard for when build is better than buy, but current guidance suggests a few clear patterns. Build can be reasonable for hyperscale platforms, regulated environments with custom authentication workflows, or products that need tight integration with an internal identity fabric. Buy is usually safer when the organisation needs mature device support, rapid compliance evidence, and predictable updates as standards evolve. The risk of underinvestment is not theoretical: NHI Management Group notes that 79% of organisations have experienced secrets leaks, with 77% resulting in tangible damage, which is a useful signal of how identity shortcuts often end. For teams prioritising rollout speed and supportability, the broader operating assumptions in the 2026 Infrastructure Identity Survey underscore how quickly identity tooling becomes a governance issue once scaled.
In the real world, the wrong choice is usually made when passkeys are treated as a one-time implementation rather than a living identity capability that must evolve with devices, standards, and enterprise policy.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA | Passkeys are an identity assurance control that must fit enterprise governance. |
| OWASP Non-Human Identity Top 10 | NHI-03 | Build-vs-buy hinges on lifecycle management and credential revocation discipline. |
| NIST AI RMF | Identity decisions for AI and automation need governance, accountability, and risk treatment. |
Choose the option that enforces short-lived, governed identity lifecycle controls by default.
Related resources from NHI Mgmt Group
- How should security teams decide whether JIT access is safe for non-human identities?
- How should teams decide whether to build or buy identity governance?
- How should teams decide whether to build or buy authorization logic?
- How should security teams decide whether to build authorization in-house or buy it?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
