OIDC vs SAML for Enterprise SSO: A 2026 Decision Guide - Part 2

Part 2 of this series on choosing between OIDC and SAML for enterprise SSO in 2026 focuses on the total cost of ownership (TCO) and initial risk assessment framework. The text argues that while SAML and OIDC offer functional parity for enterprise SSO, the real decision lies in economic and operational factors, such as pricing models, licensing, and ongoing maintenance. TCO is highlighted as a crucial differentiator since factors like provider pricing models (per-connection vs. per-MAU), compliance overhead, and potential lock-in costs significantly impact the cost structure. The text also emphasizes the importance of considering operational and risk costs, such as implementation time, credential rotation, and compliance requirements, when evaluating providers. The discussion includes a detailed comparison of the two main pricing models and the potential "SSO tax" imposed by vendors, which can make SSO a costly feature. Additionally, it addresses common security risks associated with both protocols and underscores the significance of provider security track records. The guide encourages enterprises to use a comprehensive TCO framework to evaluate the true costs and risks of implementing SSO solutions.

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