Authentication & Identity Management (IAM)
4.6/5.0
VerifiedFreeLast technical review:
Markdown for AI (.md)

Keycloak

Open source identity and access management solution with single sign-on capabilities.

Pricing

$0/mo

Free
Score

4.6/5

License
Apache-2.0
Certifications
1
Last technical review
2026-10-29
Available plansVisit website (opens in a new tab)

Technical Overview

Keycloak is an open source identity and access management solution designed for developers and infrastructure administrators. It enables single sign-on (SSO), identity federation, and advanced authentication for modern applications. Deployed via containers or on-premise, it removes the need to handle user storage and login logic within application code.

Analyst Evaluation: Pros and Limitations

Verified Advantages

  • Completely open source with no commercial licensing fees.
  • Native support for OpenID Connect, OAuth 2.0, and SAML 2.0 standards.
  • Built-in identity brokering and social login integration.

Technical Considerations

  • Requires significant memory and CPU resources for high-availability setups.
  • Steep learning curve for advanced theme customization and custom SPI development.

Technical Capabilities & Features

7/7
Included:REST & GraphQL API
Included:SSO / SAML Authentication
Included:Self-Hosted Option
Included:Full Data Export
Included:Role-Based Access Control (RBAC)
Included:Custom Domains & SSL
Included:Immutable Audit Logs
Scorecard
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Technical Scorecard: Keycloak

90/100
DX & Tech Documentation
Excellent
85/100
Pricing Fairness
Excellent
100/100
Security & Governance
Excellent
90/100
Data Portability & Sovereignty
Excellent
90/100
Performance & Reliability
Excellent
85/100

Time to Value & Fit by Segment: Keycloak

Estimated Time-to-Value1 - 7 days (Agile)

Standard sprint integration without complex external dependencies.

Learning CurveModerate (Standard)

Requires consulting technical documentation and basic credentials setup.

Fit Index by Organization Size

Startup & Agile Teams1 to 50 members
80%
Mid-Market & Scaleup50 to 500 members
90%
Corporate Enterprise500+ members
95%
Pricing & TCO
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Pricing

$0.00/mo

Model: FREE.

Free Tier Verification:

  • No credit card required
  • Commercial use allowed
  • Unlimited usage with no expiration
  • No mandatory watermarks
Get Keycloak (opens in a new tab)

Billing Risks & Hidden Clauses: Keycloak

Free Tier Limits:

Completely free and open source with unlimited usage when self-hosted.

Total Cost of Ownership (TCO) Projection: Keycloak$0.00/mo
Deterministic cost estimation at 12 and 36 months based on team size, including SSO tax premiums and annual prepay discounts.
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Licensing Cost (1 to 100+ seats)
$0/forever
Unlimited team members with zero penalties
SSO Tax (SAML Enterprise)
$0no surcharge
No artificial security barriers
3-Year Investment (Software TCO)
$0total
operates under a zero-cost or open-source model. Licensing TCO is identical:
Usage Surcharges & Bill Shock Simulator: KeycloakWhat usage costs as you scale
Detect overage penalties before they impact engineering budget.
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Prototype / MVP (10 GB)

Included base quota in plan: 10 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Suitable for development; verify concurrent connection limits.

Base Production (50 GB)

Included base quota in plan: 50 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Implement table compression policies and temporal partitioning.

Active Growth (250 GB)

Included base quota in plan: 250 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Offload cold backups to standard object storage (S3).

Large Scale (1.000 GB (1 TB))

Included base quota in plan: 1,000 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Migrate to dedicated instance or self-hosted cluster to curtail I/O fees.

Security & Data Exit
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Compliance & Security Standards: Keycloak

SOC 2 Type IINot reported
ISO 27001Not reported
GDPR / RGPDAudited
HIPAANot reported
PCI-DSSNot reported
Jurisdiction & Legal Sovereignty
🇺🇸United States [US]Immune to US CLOUD Act (EU Sovereign)DPA On Request
SSO Availability (SAML Enterprise)
Integrated Free SSO
Data Residency
SELF_HOSTED
AI Privacy Policy
Not evaluated
Data Liberation & Migration Runbook: KeycloakJSON
Actionable escape runbook and credential export guarantees to mitigate vendor lock-in.
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Supported Structured Export Formats
JSON
Password Hash Portability
Exportable Hashes (Bcrypt / Argon2): Zero Forced Retention

Allows extracting password hashes in standard formats to migrate without forcing user resets.

CLI Command / Rescue Endpoint
kc.sh export --file realm-export.json
Exit Protocol & Migration Notes

La exportación e importación de configuraciones de realm se realiza de forma nativa mediante archivos JSON mediante la interfaz de comandos o la CLI de Keycloak.

Deployment & Infrastructure Requirements: KeycloakApache-2.0
Hardware specs and Docker directives to run on local servers, dedicated VPS, or Kubernetes without telemetry leak to the cloud.
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Minimum Memory1 GB RAM (Recommended)
Compute CPU1 vCPU
Runtime / LanguageJava
Code LicenseApache-2.0
Docker CLI Directive
docker run -d --name keycloak -p 8080:8080 keycloak:latest
Companion Services & Dependencies:
PostgreSQL 15+Redis 7+
Community & Repository
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Technical Reputation of Keycloak

91/100 Technical Trust

Frequent Praises in Production

  • Completely open source with no commercial licensing fees.
  • Native support for OpenID Connect, OAuth 2.0, and SAML 2.0 standards.
  • Built-in identity brokering and social login integration.

Reported Production Frictions

  • Requires significant memory and CPU resources for high-availability setups.
  • Steep learning curve for advanced theme customization and custom SPI development.
Commercial Treatment & Vendor Lock-in:1-Click Cancellation

Immediate cancellation from account settings without phone calls or forced retention.

Open source repository activity: Keycloak37,577
Stars, forks and release cadence
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Stars37.6k
Forks9.1k
Open Issues3.4k
SPDX LicenseApache-2.0
Latest Commit DetectedOct 28, 2026

Frequently Asked Technical Questions (Keycloak)

How is Keycloak deployed in production environments?

Keycloak is officially distributed as a Quarkus-based Docker container image, making it straightforward to deploy on Kubernetes, Docker Compose, or virtual machines.

What authentication protocols does Keycloak support?

It natively supports industry standards including OpenID Connect for token-based authentication and SAML 2.0 for enterprise identity federation.

Are there any licensing costs or user limits?

As free open source software under the Apache 2.0 license, there are no licensing fees or limits on the number of users managed.

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