Keycloak vs Duo Security -- Open Source IAM Compared

Keycloak vs Duo Security

Duo Security and Keycloak are both mfa & zero trust access solutions. Duo Security cisco's MFA and zero trust access platform known for ease of deployment, while Keycloak open-source IAM platform with SSO, identity brokering, and fine-grained authorization. The best choice depends on your organization's size, technical requirements, and budget.

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The Verdict

Choose Duo Security if exceptionally easy to deploy — fastest MFA rollout in the industry is your priority and organizations prioritizing easy-to-deploy MFA across VPNs, cloud apps, and legacy systems, especially those in Cisco networking environments. Choose Keycloak if completely free — no licensing costs regardless of user count matters most and organizations with engineering expertise that want full control over their identity platform, avoid vendor lock-in, and eliminate IAM licensing costs.

Used Keycloak or Duo Security? Share your experience.

Feature-by-Feature Comparison

FeatureDuo SecurityKeycloak
PricingFree (open source) / Red Hat SSO for enterprise supportFree (up to 10 users) / Essentials $3/user/month / Advantage $6/user/month / Premier $9/user/month
Pricing ModelFree open source with optional commercial supportPer-user monthly subscription with free tier
Open SourceYesNo
DeploymentSelf-HostedCloud
Best ForOrganizations with engineering expertise that want full control over their identity platform, avoid vendor lock-in, and eliminate IAM licensing costsOrganizations prioritizing easy-to-deploy MFA across VPNs, cloud apps, and legacy systems, especially those in Cisco networking environments
Push-based multi-factor authenticatio...Not availableSupported
Device trust and health verificationNot availableSupported
Adaptive access policies based on use...Not availableSupported

When to Choose Each Tool

Choose Duo Security when:

  • +You value completely free — no licensing costs regardless of user count
  • +You value full source code access enables deep customization
  • +You value self-hosted deployment gives complete data sovereignty
  • +You want to avoid sSO capabilities are less mature than dedicated IAM platforms like Okta
  • +You want to avoid limited identity lifecycle management and provisioning features

Choose Keycloak when:

  • +You value exceptionally easy to deploy — fastest MFA rollout in the industry
  • +You value duo Push is the most user-friendly MFA experience available
  • +You value strong VPN and legacy application MFA support
  • +You want to avoid requires significant engineering effort to deploy, scale, and maintain
  • +You want to avoid no managed cloud service — you own all infrastructure operations

Pros & Cons Comparison

Duo Security

Pros

  • +Easy to deploy — fast MFA rollout times
  • +Duo Push is the most user-friendly MFA experience available
  • +Strong VPN and legacy application MFA support
  • +Free tier for up to 10 users enables quick proof of concept
  • +Cisco ecosystem integration adds network-level zero trust capabilities

Cons

  • SSO capabilities are less mature than dedicated IAM platforms like Okta
  • Limited identity lifecycle management and provisioning features
  • Application integration catalog much smaller than full IAM platforms
  • Advanced features require Premier tier pricing comparable to Okta
  • Identity governance and access certification features are absent

Keycloak

Pros

  • +Completely free — no licensing costs regardless of user count
  • +Full source code access enables deep customization
  • +Self-hosted deployment gives complete data sovereignty
  • +Red Hat backing provides commercial support option (Red Hat SSO)
  • +Active community with extensive documentation and extensions

Cons

  • Requires significant engineering effort to deploy, scale, and maintain
  • No managed cloud service — you own all infrastructure operations
  • Pre-built SaaS application integrations far fewer than commercial platforms
  • User experience and admin UI less polished than Okta or Entra ID
  • High-availability and disaster recovery require complex infrastructure engineering

Sources & References

  1. Duo Security — Official Website & Documentation[Vendor]
  2. Keycloak — Official Website & Documentation[Vendor]
  3. Duo Security Reviews on G2[User Reviews]
  4. Keycloak Reviews on G2[User Reviews]
  5. Duo Security Reviews on TrustRadius[User Reviews]
  6. Keycloak Reviews on TrustRadius[User Reviews]
  7. Duo Security Reviews on PeerSpot[User Reviews]
  8. Keycloak Reviews on PeerSpot[User Reviews]
  9. Gartner Magic Quadrant for Single-Vendor SASE 2024[Analyst Report]
  10. Gartner Magic Quadrant for Security Service Edge 2024[Analyst Report]
  11. Forrester Wave: Zero Trust Network Access, Q3 2023[Analyst Report]
  12. IDC MarketScape: Worldwide SASE 2024[Analyst Report]
  13. CISA Zero Trust Maturity Model[Government Standard]
  14. Gartner Peer Insights: SSE[Peer Reviews]

Keycloak vs Duo Security FAQ

Common questions about choosing between Keycloak and Duo Security.

What is the main difference between Keycloak and Duo Security?

Duo Security and Keycloak are both mfa & zero trust access solutions. Duo Security cisco's MFA and zero trust access platform known for ease of deployment, while Keycloak open-source IAM platform with SSO, identity brokering, and fine-grained authorization. The best choice depends on your organization's size, technical requirements, and budget.

Is Duo Security better than Keycloak?

Choose Duo Security if exceptionally easy to deploy — fastest MFA rollout in the industry is your priority and organizations prioritizing easy-to-deploy MFA across VPNs, cloud apps, and legacy systems, especially those in Cisco networking environments. Choose Keycloak if completely free — no licensing costs regardless of user count matters most and organizations with engineering expertise that want full control over their identity platform, avoid vendor lock-in, and eliminate IAM licensing costs.

How much does Duo Security cost compared to Keycloak?

Duo Security pricing: Free (up to 10 users) / Essentials $3/user/month / Advantage $6/user/month / Premier $9/user/month. Keycloak pricing: Free (open source) / Red Hat SSO for enterprise support. Duo Security's pricing model is per-user monthly subscription with free tier, while Keycloak uses free open source with optional commercial support pricing.

Can I migrate from Keycloak to Duo Security?

Yes, you can migrate from Keycloak to Duo Security. The migration process depends on your specific setup and the features you use. Both platforms offer APIs that can facilitate automated migration. Consider running both tools in parallel during the transition to ensure zero downtime.