Keycloak vs Open Policy Agent: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Keycloak and Open Policy Agent side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Keycloak
Open-source identity and access management
Best for you if:
- • You want open source identity
Open Policy Agent
Unify policy enforcement across your entire software stack with a high-performance policy engine.
Best for you if:
- • You want unifies policy enforcement across diverse systems
| At a Glance | Open Policy Agent | |
|---|---|---|
Starts at | Free 100% free | Free 100% free |
Category | Identity & Access Security | Security DevOps |
Rating | n/a | n/a |
Free plan | Yes | Yes |
Choose Keycloak or Open Policy Agent?
Choose Keycloak if
- You want open source identity
- You want self-hostable
- You work in identity & access, not security
Choose Open Policy Agent if
- You want unifies policy enforcement across diverse systems
- You want enhances developer productivity by externalizing policy
- You work in security, not identity & access
In-Depth Analysis
Keycloak
Open-source identity and access management
Keycloak's pricing is exceptionally generous, being entirely free as an open-source solution.
Strengths
- Pro: Open source identity
- Pro: Self-hostable
- Pro: Feature rich
- Pro: No per-user cost
- Pro: Enterprise ready
Weaknesses
- Con: Complex to set up
- Con: Requires maintenance
- Con: Learning curve
- Con: Java-based
- Con: UI dated
Key features
Open Policy Agent
Unify policy enforcement across your entire software stack with a high-performance policy engine.
Strengths
- Pro: Unifies policy enforcement across diverse systems
- Pro: Enhances developer productivity by externalizing policy
- Pro: Provides detailed audit trails for compliance and debugging
- Pro: High performance due to Rego language and in-memory data processing
- Pro: Flexible and extensible for a wide range of use cases
Weaknesses
- Con: Requires learning a new declarative language (Rego)
- Con: Initial setup and integration can be complex for new users
- Con: Policy management can become intricate for very large and complex organizations
Key features
Plans and prices: Keycloak vs Open Policy Agent
| Tool | Plans and prices | Source |
|---|---|---|
| Keycloak |
| keycloak.org read Sep 28, 2026 |
| Open Policy Agent | No plan prices on file | openpolicyagent.org |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Keycloak pricing and Open Policy Agent pricing.
Key Takeaways
Keycloak
- Choose if you want open-source identity and access management
Open Policy Agent
- Choose if you want unify policy enforcement across your entire software stack with a high-performance policy engine
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Keycloak and Open Policy Agent compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Both have a free plan.
What are Keycloak and Open Policy Agent used for?
Keycloak: Open-source identity and access management. Open Policy Agent: Unify policy enforcement across your entire software stack with a high-performance policy engine.
What does Keycloak cost vs Open Policy Agent?
Keycloak is free. Open Policy Agent is free. Prices read on the vendors' pricing pages, latest check Sep 28, 2026.
What's the main difference between Keycloak and Open Policy Agent?
Keycloak's main strength: open source identity. Open Policy Agent's main strength: unifies policy enforcement across diverse systems.