Compare Tools

Firebase Auth vs WorkOS

Live comparisonView as JSON
Firebase Auth
cloudFree up to 50k MAU
WorkOS
cloudFree up to 1M MAU
Agent Sdk
Token Delegation
Human In The Loop
Fga
Mcp Support
Async Authorization
Pricing
Free up to 50k MAUBlaze pay-as-you-goPhone auth: 10¢/verification
Free up to 1M MAUPay-as-you-go afterCustom Enterprise
Open Source
Self-Hosted
SDK Languages
javascripttypescriptpythonjavaswiftkotlingo
javascripttypescriptpythongorubyjava
Frameworks
langchainvercel-ai
langchainvercel-ai
Compliance
soc2gdpr
soc2gdprhipaa
Best For
Rapid prototyping and Google-native stacks; low-friction auth for AI apps that don't need agent-specific authorization
Enterprise SSO, M2M authentication, and fine-grained authorization for B2B agent products
Limitations
No token delegation, no FGA, no agent SDK; vendor lock-in to Google Cloud; limited authorization model
No dedicated agent SDK; FGA is strong but relatively new; async authz patterns require custom integration

Supported Not supported Unverified

Firebase Authentication and WorkOS both provide identity infrastructure for modern applications, but Firebase is Google's managed B2C authentication service tightly integrated with GCP while WorkOS is an enterprise identity platform with an Admin Portal, SCIM provisioning across major enterprise directories, Fine-Grained Authorization, and MCP server support. WorkOS wins on enterprise B2B multi-tenancy, self-serve SSO provisioning, and agentic FGA capabilities; Firebase wins on native GCP ecosystem integration and an accessible B2C baseline with an upgradable enterprise path.

Where WorkOS wins

  • Enterprise SSO and SCIM Self-Serve via Admin Portal. WorkOS ships a hosted Admin Portal that allows enterprise customers to self-configure SAML and OIDC SSO connections and manage SCIM directory sync with Okta, Azure AD, Google Workspace, Workday, and other major providers without requiring engineering involvement on each deal. Firebase Authentication requires upgrading to Google Cloud Identity Platform for SAML and OIDC support, and provides no equivalent self-serve provisioning portal.

  • Fine-Grained Authorization. WorkOS provides a FGA engine, enabling teams to model document-level, resource-level, and relationship-based access control policies. Firebase Authentication provides no equivalent FGA primitive; its security rules are scoped to Firestore collections rather than offering a portable authorization layer.

  • Free Up to One Million MAUs with AuthKit. WorkOS offers its AuthKit user management product free for up to one million monthly active users, making it accessible for growing B2B SaaS products before enterprise seat pricing applies. Firebase Authentication's free tier is generous for B2C but does not include equivalent enterprise SSO or multi-tenancy primitives at any price tier without an Identity Platform upgrade.

Where Firebase wins

  • Native GCP Ecosystem Integration. Firebase Authentication integrates directly with the Google Cloud Platform stack, connecting with Firestore, Cloud Functions, Cloud Storage, and Google Analytics for Firebase without requiring custom bridge integrations. Teams already operating within GCP benefit from a unified billing model, shared IAM primitives, and native event-driven triggers.

  • Accessible B2C Baseline with Zero Infrastructure Overhead. Firebase Authentication requires no servers to provision or maintain and scales automatically as a managed Google service. Its simplified SDK-based integration and generous free tier make it an accessible starting point for consumer applications that do not yet require enterprise identity features.

  • Upgradable Enterprise Path via Identity Platform. Firebase Authentication can be upgraded to Google Cloud Identity Platform, unlocking SAML and OIDC federated identity, multi-factor authentication, and tenant management. This upgrade path allows teams to start with Firebase and grow into enterprise identity capabilities while remaining within the Google Cloud ecosystem.

The agentic difference

WorkOS supports agentic infrastructure. Its MCP server support enables AI agents to authenticate against WorkOS-protected APIs using OAuth 2.1 flows. Its FGA engine enforces document-level permissions during Retrieval-Augmented Generation vector searches, preventing agents from accessing documents outside their authorized scope. WorkOS also provides an encrypted key store for managing sensitive credentials. However, the vault does not support automated token refresh for outbound third-party APIs.

Firebase Authentication operates as a traditional, human-centric authentication service. It lacks abstractions for MCP servers, provides no token vault or delegation framework for outbound agent credentials, offers no AI agent lifecycle management layer, and supports no RAG-aware data scoping. Neither platform supports CIBA for asynchronous human-in-the-loop authorization workflows.

When to pick which

  • Pick WorkOS when building a B2B SaaS application that requires enterprise SSO and SCIM provisioning across major identity providers, because its Admin Portal enables customer self-service without requiring engineering involvement on each enterprise onboarding.

  • Pick WorkOS when building AI agent workflows that require document-level authorization during RAG queries, because its FGA engine provides the relationship-based access control primitives needed to enforce granular agent permissions.

  • Pick Firebase when building a new application on Google Cloud Platform that requires tight integration with Firestore, Cloud Functions, or GCP's event-driven infrastructure, because its native GCP bindings provide a unified data and authentication layer without custom bridge integrations.

Last verified: 2026-05-09