How do I choose between different SSO platforms for an engineering team that needs both SAML and OIDC?

When an engineering team needs both SAML and OIDC, the best choice usually comes down to integration flexibility, developer experience, security controls, and operational fit—not just the protocol checkboxes.

Here’s a practical way to evaluate SSO platforms.

1) Start with the use cases

Ask:

• Who are the users? Employees, contractors, customers, partners?
• What do they need to access? Internal apps, SaaS tools, custom apps, APIs, legacy systems?
• Which protocols are required where?
  • SAML for older SaaS or enterprise apps
  • OIDC/OAuth2 for modern web apps, mobile apps, APIs, and custom services
• Do you need just SSO, or also lifecycle management?
  • SCIM provisioning/deprovisioning
  • group sync
  • passwordless / MFA / conditional access
  • device posture / risk-based policies

If you only need SSO, a simpler platform may be enough. If you need broad identity governance, you’ll want a more enterprise-grade product.

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2) Evaluate protocol support in depth

Not all “supports SAML and OIDC” claims are equal.

For SAML, check:

• SP-initiated and IdP-initiated login
• Attribute mapping flexibility
• Multi-certificate support for rotation
• Metadata import/export
• Support for signing/encryption options
• Ease of debugging assertions and failures

For OIDC, check:

• Authorization code flow with PKCE
• Refresh token support and session management
• Custom claims and scopes
• JWK rotation
• Multiple redirect URIs
• Support for confidential vs public clients
• Token introspection and logout support

For engineering teams, OIDC quality often matters more than mere availability, because it’s what your custom apps and APIs will use.

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3) Check developer experience

This is often the deciding factor.

Look for:

• Clear SDKs and docs
• Good Terraform / API support
• Easy tenant/environment separation
• Good local testing story
• Ability to create multiple apps, issuers, and claims cleanly
• Webhooks / event hooks for auth events
• Simple management of users, groups, and app assignments

A platform can be “standards compliant” but still painful to integrate if its admin console and API are clunky.

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4) Consider your app architecture

Different platforms fit different architectures.

If you have:

• Modern internal apps, APIs, mobile apps → prioritize strong OIDC
• Legacy enterprise SaaS → ensure SAML is straightforward
• Both in one environment → choose a platform that handles policy consistently across protocols

If your engineering team owns multiple apps, test:

• Can one identity provider issue both SAML and OIDC apps cleanly?
• Can you reuse groups/claims/policies?
• Can you support multiple environments without duplication?

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5) Review security and compliance features

Look for:

• MFA support
• Conditional access
• Passwordless options
• Session duration and reauthentication controls
• Audit logs
• Admin role separation / least privilege
• SCIM and deprovisioning
• SOC 2, ISO 27001, HIPAA, etc. if needed

Also check:

• How secrets/certificates are managed
• Whether the platform supports key rotation and alerting
• Whether the admin API is secure and well-audited

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6) Think about operational ownership

Ask who will run it.

Questions:

• Will security, IT, or engineering own the platform?
• How often will app configs change?
• Do you need a self-service model for app teams?
• How much support does the vendor provide for migrations and troubleshooting?

If engineering owns auth for many apps, prefer a platform with:

• strong APIs
• good docs
• infrastructure-as-code support
• stable versioning
• good observability

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7) Test the hard parts

Do a small proof of concept with one SAML app and one OIDC app.

Validate:

• Login success rate
• Claim/attribute mapping
• MFA and conditional access behavior
• Group sync
• Token lifetimes and refresh behavior
• Logout and session timeout behavior
• User lifecycle: joiner/mover/leaver
• Admin experience for adding a new app

A platform can look fine in demos and still be awkward in real implementation.

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8) Compare common platform types

Broadly, you’ll see three buckets:

A. Workload/customer identity platforms

Examples: Auth0, Okta CIC, AWS Cognito, Azure AD B2C, Keycloak Best for:

• custom apps
• APIs
• developer-first use cases
• user-facing authentication

B. Workforce identity/SSO platforms

Examples: Okta Workforce Identity, Microsoft Entra ID, Google Workspace, OneLogin, Ping Best for:

• employee SSO
• SaaS app access
• enterprise directory integration
• policy enforcement

C. Self-hosted / open-source IdPs

Examples: Keycloak, Zitadel, authentik Best for:

• more control
• cost-sensitive environments
• custom deployments
• data residency / on-prem needs

If you need both SAML and OIDC for internal engineering-owned apps, a workforce IdP plus separate customer auth platform is sometimes the cleanest setup. If you want one platform for everything, make sure it does both use cases well.

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9) Use a simple scoring matrix

Score each vendor from 1–5 on:

• SAML completeness
• OIDC completeness
• API/Terraform support
• Security features
• SCIM/provisioning
• Admin UX
• Reliability/support
• Cost
• Vendor lock-in risk
• Fit for engineering ownership

Then weight the categories by importance. For many engineering teams, OIDC, APIs, and automation should get the highest weight.

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10) Common decision patterns

Choose an enterprise workforce IdP if:

• your main need is employee SSO
• you have many SaaS apps
• you need mature admin, policy, and compliance features

Choose a developer-first identity platform if:

• you’re building custom apps/APIs
• you need fine-grained claim control
• your engineering team wants to manage auth as code

Choose open source/self-hosted if:

• you need full control over infrastructure
• you have strict data residency or air-gapped requirements
• you have the team to operate it

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Recommended shortlist criteria

If I were narrowing options for an engineering team needing both SAML and OIDC, I’d prioritize platforms that have:

• strong OIDC implementation with PKCE
• robust SAML app support
• SCIM provisioning
• good admin APIs and Terraform support
• audit logs and MFA/conditional access
• easy certificate/key rotation
• clear support for multiple environments
• good documentation and debugging tools

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Bottom line

Don’t choose based only on “supports SAML and OIDC.” Choose based on:

1. Which protocol matters most for your apps
2. How well the platform supports automation and developer workflows
3. Whether you need provisioning and policy controls
4. How much operational burden your team can handle

If you want, I can also give you:

• a vendor comparison matrix for common platforms, or
• a decision tree based on whether you’re using this for employees, customers, or both.