Keycloak vs WorkOS: B2B SSO Compared

Last updated: June 2026

Keycloak and WorkOS solve the B2B SSO problem from opposite ends of the spectrum. WorkOS is a commercial, closed-source API designed to make adding enterprise SSO and directory sync to a B2B SaaS application as fast as possible, with zero infrastructure to operate. Keycloak is a mature, Apache 2.0-licensed identity provider you deploy yourself — or have hosted for you — with no per-connection fees, no MAU billing, and full control over every aspect of your identity layer. Choose WorkOS when your priority is shipping enterprise SSO to customers in days with minimal engineering lift. Choose Keycloak when you need data sovereignty, cost predictability at scale, full IdP capabilities, or the freedom to extend and customize without vendor constraints. Managed Keycloak through a provider like Skycloak splits the difference: open-source power with operational simplicity.

What each product actually is

Before comparing features, it is worth being precise about what these two products are — because they operate at different layers of the stack.

WorkOS is a third-party API service that sits between your B2B SaaS application and your enterprise customers’ identity providers. Your customers bring their own Okta, Azure AD, or Google Workspace tenants. WorkOS handles the SAML/OIDC federation complexity, gives your app a unified user profile, and provides an Admin Portal UI that your customers’ IT administrators use to configure the SSO connection without contacting your support team. WorkOS is not an identity provider in the traditional sense — it does not issue tokens for end users or manage user sessions on your behalf across your product.

Keycloak is a full identity provider (IdP) and authorization server. It issues OIDC tokens and SAML assertions, manages user sessions, federates to upstream identity providers (Azure AD, LDAP, SAML, Google, etc.), handles MFA, stores users in its own database, and exposes a complete Admin REST API. You can also use Keycloak as the “customer-facing SSO layer” in a B2B SaaS product — this is exactly what Keycloak’s Organizations feature is designed for.

The choice between them depends heavily on whether you want to own the identity layer or delegate it.

Licensing and open-source status

Aspect	Keycloak	WorkOS
License	Apache 2.0 (OSI-approved open source)	Proprietary, closed source
Source code available	Yes (GitHub)	No
Self-hostable	Yes	No
Vendor lock-in	Low — any host, any cloud	High — API dependency
Redistribution	Unrestricted	Not applicable
All features free	Yes	No (usage-based pricing)

Keycloak is genuinely open source under the Apache 2.0 license. Every feature — including SAML federation, SCIM, fine-grained authorization, and the Admin API — is available to every user at no cost. There is no enterprise edition gating. WorkOS is a proprietary SaaS API; you do not get access to the source code, you cannot self-host it, and your integration depends entirely on WorkOS’s platform continuing to operate.

Hosting and deployment model

Aspect	Keycloak	WorkOS
Deployment	Self-hosted or managed (Skycloak, Red Hat)	WorkOS-hosted SaaS only
Infrastructure control	Full (your servers, your cloud)	None
Data residency	Configurable (any region)	WorkOS-controlled regions
Air-gapped deployment	Yes	No
Availability SLA	Depends on hosting provider	WorkOS provides SLA
Ops burden (self-hosted)	High	None
Ops burden (managed)	Low (provider handles it)	None

Keycloak’s deployment flexibility is one of its defining strengths. A team with strict data residency requirements — healthcare, financial services, government — can run Keycloak in a specific AWS region, an on-premises data center, or an air-gapped environment. WorkOS routes authentication traffic through its own infrastructure, which means enterprise customer SSO data passes through a third-party service. For teams with sovereign cloud requirements or customers who prohibit sub-processors, this is a disqualifying constraint.

For teams that want the data-control benefits of Keycloak without the operational overhead, managed Keycloak hosting handles upgrades, clustering, backups, and monitoring while keeping data on your chosen cloud provider. See how self-hosted vs. managed authentication costs compare to understand the full picture.

SSO and SAML

Feature	Keycloak 26.x	WorkOS
SAML 2.0 (IdP)	Full	Acts as SP, not IdP
SAML 2.0 (SP / brokering)	Full	Full (core use case)
OIDC / OAuth 2.0	Full	Full
Just-in-Time (JIT) provisioning	Yes	Yes
Custom attribute mapping	Yes (protocol mappers)	Yes
Multiple enterprise connections per org	Yes (per-realm or per-org)	Yes
Admin Portal for customers	Via Keycloak admin console or custom UI	Built-in (hosted by WorkOS)
SSO enforcement	Yes (via authentication flows)	Yes
Connection testing / debugging	Admin console + SAML decoder	Admin Portal + WorkOS dashboard

WorkOS’s primary value proposition is the enterprise SSO connection experience. Its Admin Portal is a production-ready, embeddable UI that your enterprise customers’ IT admins use to set up and manage their SAML or OIDC connection — without any involvement from your engineering team. This is genuinely well-designed and removes a real pain point for B2B SaaS companies.

Keycloak handles the same SAML brokering at a lower level. You can build a self-service onboarding flow using Keycloak’s Admin API, or use the built-in admin console. The Organizations feature (introduced in Keycloak 25 and mature in 26.x) provides a model where each enterprise customer maps to an Organization, with their own identity provider configuration and member management. It is more flexible but requires more product engineering to expose as a polished customer experience. For a detailed implementation walkthrough, see the SSO implementation guide for developers.

You can test SAML payloads and debug SSO connections with the SAML Decoder tool and inspect the resulting tokens with the JWT Token Analyzer.

SCIM and directory sync

Feature	Keycloak 26.x	WorkOS
SCIM 2.0 endpoint (inbound)	Yes	Yes
Directory Sync (Azure AD, Okta, etc.)	Yes (via SCIM or LDAP federation)	Yes (Directory Sync product)
LDAP / Active Directory federation	Built-in (bidirectional)	Not supported
Real-time deprovisioning	Yes	Yes
Attribute mapping	Yes	Yes
Groups sync	Yes	Yes

Directory sync is a distinct WorkOS product (sold separately from SSO). It normalizes user data from Azure AD, Okta, Google Workspace, OneLogin, and others into a unified directory via webhooks. This abstraction is useful if your app needs to respond to user lifecycle events (hire/termination) without caring about the upstream directory format.

Keycloak’s SCIM support enables the same inbound provisioning scenarios. Azure AD, Okta, and other IdPs can push user and group changes to Keycloak’s SCIM 2.0 endpoint in real time. Keycloak also has native LDAP federation that can bidirectionally synchronize with on-premises Active Directory — something WorkOS does not support at all. For a practical walkthrough of SCIM configuration with Keycloak, see using SCIM 2.0 with Skycloak managed Keycloak. You can also test your SCIM endpoint configuration with the SCIM Endpoint Tester tool.

Admin portal and customer-facing UX

This is one of WorkOS’s clearest advantages. The WorkOS Admin Portal is a hosted, white-labelable UI that enterprise customers use to configure their SSO connection — selecting their IdP, uploading metadata XML, mapping attributes, and testing the connection — all without help from your support team. It is production-ready, handles edge cases, and reduces your time-to-first-enterprise-customer significantly.

Keycloak does not ship an equivalent “customer self-service SSO setup wizard” out of the box. What it does ship is a powerful Admin REST API and a comprehensive admin console. Building a customer-facing SSO setup flow on top of those primitives is a product engineering task. Teams using Keycloak in a B2B SaaS product typically build a lightweight setup UI (or a guided flow via their support process) that calls the Keycloak Admin API to create a per-organization identity provider.

The practical implication: if your B2B SaaS targets IT-savvy enterprise buyers and you have limited frontend engineering capacity, WorkOS’s Admin Portal saves weeks of product work. If you have that engineering capacity — or if your enterprise customers go through a human onboarding process anyway — the gap is less meaningful.

Customization and extensibility

Aspect	Keycloak 26.x	WorkOS
Login page branding	Full (custom themes, FreeMarker)	Limited (logo + colors)
Custom authentication flows	Yes (flow designer + SPI)	No
Custom token claims	Yes (protocol mappers)	Limited attribute mapping
Webhook / event system	Yes (event listeners)	Yes (webhooks)
Extension language	Java (SPI)	Not applicable
Social login providers	20+ built-in + custom	Limited
Fine-grained authorization (RBAC/ABAC)	Full (UMA 2.0, Authorization Services)	Basic role sync

Keycloak’s Service Provider Interface (SPI) allows deep customization of nearly every subsystem: authentication flows, password hashing, user storage, event handling, token content, and login themes. You can ship a fully branded login experience with custom authentication steps — hardware token, risk scoring, step-up auth — all without touching WorkOS’s roadmap.

WorkOS is explicitly a “get enterprise SSO done quickly” tool, not a platform for customizing the authentication experience. Its customization surface is intentionally narrow.

Cost model

This section describes the pricing structures, not specific prices, which change frequently — check each vendor’s current pricing page for current figures.

WorkOS uses a usage-based model. You pay based on the number of enterprise SSO connections and/or monthly active users you have. There are typically free tier allowances for development and low-volume use, with per-connection or per-MAU charges that scale with your customer base. Directory Sync is priced separately from SSO. As your B2B SaaS grows — more enterprise customers, more connections, more directory sync events — your WorkOS bill scales with it. Enterprise SSO is a premium feature, so WorkOS pricing reflects that positioning.

Keycloak has no license cost. Your costs are infrastructure: compute, database, load balancer, and optionally a managed hosting provider. The key property is that cost is flat relative to user count and connection count. Whether you have ten enterprise SSO connections or a thousand, you do not pay more per connection. For B2B SaaS companies expecting significant growth in enterprise customers, this cost structure becomes a meaningful advantage.

Managed Keycloak (via a provider like Skycloak) introduces a predictable monthly infrastructure fee — no per-connection or per-MAU component. This model is favorable when the number of enterprise connections is growing, because unit cost per connection decreases rather than holding constant.

The breakeven point where Keycloak’s infrastructure cost becomes cheaper than WorkOS’s usage-based cost depends on your number of enterprise connections and users. Use the IAM ROI Calculator to model your specific scenario. For a deeper cost analysis framework, see our post on self-hosted vs. managed authentication costs.

Data residency and control

Aspect	Keycloak	WorkOS
User data location	Your infrastructure	WorkOS infrastructure
Sub-processor control	Full (no third parties required)	WorkOS is a sub-processor
GDPR data deletion	Direct database access	API-based
On-premises deployment	Yes	No
Custom domain for auth	Yes (your domain, full TLS control)	Yes (custom domain feature)
Audit log access	Full (Keycloak event store)	WorkOS dashboard

For B2B SaaS selling into healthcare, finance, defense, or regulated European markets, data residency is not a checkbox — it is a blocker. Keycloak deployed in your own environment means enterprise customer identity data never leaves your control boundary. WorkOS, as a sub-processor in your data flow, must be disclosed to customers and accepted in your data processing agreements.

Keycloak’s audit logs give you a complete, queryable record of authentication events stored in your own database. WorkOS provides audit log access through its dashboard. The practical difference matters during incident response and compliance audits.

Decision matrix

Criteria	Choose WorkOS	Choose Keycloak (managed or self-hosted)
Time to first enterprise SSO	Days	1–2 weeks (with managed Keycloak)
Ops team available	No	Yes (self-hosted) or not needed (managed)
Data residency requirements	Flexible / none	Strict or sovereign
Number of SSO connections	Few, growing slowly	Many, growing fast
Cost model preference	Usage-based, pay-as-you-go	Flat, infrastructure-based
LDAP / on-prem AD federation	Not needed	Required
Login page customization	Basic	Full
Custom auth flows	Not needed	Required
Fine-grained authorization	Not needed	Required
Vendor lock-in tolerance	Acceptable	Not acceptable
B2B multi-tenancy model	Simple per-customer SSO	Complex org-level IdP with own branding

Frequently asked questions

Is Keycloak a WorkOS alternative?

Yes, with caveats. Keycloak can replace WorkOS for the enterprise SSO and SCIM use cases, but requires more product engineering to expose a comparable customer self-service experience. WorkOS ships a ready-made Admin Portal; Keycloak gives you the Admin API and Organizations primitives to build your own. For teams that prioritize data control, cost at scale, or customization over time-to-ship, Keycloak is the stronger long-term foundation. For teams that need to ship enterprise SSO in days with no infrastructure work, WorkOS is the faster path. For context on how Keycloak compares more broadly against other commercial identity services, see Keycloak vs Auth0.

Is WorkOS open source?

No. WorkOS is a proprietary, closed-source API service. You cannot inspect the source code, self-host it, or modify its behavior beyond what its API surface allows. Keycloak, by contrast, is open source under the Apache 2.0 license, with the full source available on GitHub and an active community of contributors from Red Hat, independent developers, and enterprise adopters.

Does Keycloak support SCIM and directory sync?

Yes. Keycloak 26.x includes built-in SCIM 2.0 server support, enabling enterprise identity providers like Azure AD, Okta, and Google Workspace to provision and deprovision users automatically. Keycloak also supports native LDAP and Active Directory federation with bidirectional sync — a capability WorkOS does not offer. See using SCIM 2.0 with Skycloak managed Keycloak for implementation details.

Does Keycloak have an Admin Portal like WorkOS?

Not out of the box. Keycloak’s Organizations feature (mature in 26.x) provides the data model and API for per-customer identity provider configuration, but it does not include a pre-built, customer-facing SSO setup wizard. Teams building a B2B SaaS product typically use the Keycloak Admin REST API to create a lightweight onboarding flow. WorkOS’s Admin Portal is a genuine competitive advantage for teams that need to ship that experience quickly without custom product work.

Which is better for a B2B SaaS startup?

It depends on your stage and constraints. If you are pre-product-market fit and need enterprise SSO as a checkbox feature to close one or two deals, WorkOS’s speed advantage is real and valuable — you can integrate it quickly and revisit the decision later. If you are post-PMF, growing your enterprise segment rapidly, or operating in a regulated industry where data control matters, Keycloak’s flat cost model and full data ownership become increasingly compelling. Managed Keycloak reduces the operational gap significantly, making Keycloak viable at earlier stages than pure self-hosting allows.

Wrapping up

WorkOS and Keycloak are not direct competitors in the traditional sense. WorkOS is a well-executed product that solves a specific, narrow problem — adding enterprise SSO to a B2B SaaS application — extremely well, with minimal engineering effort. Keycloak is a full-featured open-source identity platform that can solve that same problem, plus LDAP federation, custom authentication flows, fine-grained authorization, and complete data ownership.

The choice comes down to your priorities: if shipping enterprise SSO in the next sprint matters more than anything else, WorkOS delivers. If you are building for the long term, need cost predictability at scale, or operate in markets where data residency is non-negotiable, Keycloak’s architecture is more aligned with those requirements. Managed Keycloak closes the operational gap — you get an enterprise-grade IdP without running infrastructure yourself, at a flat monthly cost that does not scale with your customer count.

Ready to evaluate managed Keycloak for your B2B SaaS? Review Skycloak’s plans and pricing to see how it compares to both WorkOS and self-hosted Keycloak for your scale.