Compare Tools
Pick a category, then select 2–3 tools to compare side by side.
Category
Select 2–3 tools to compare
Firebase AuthcloudFree up to 50k MAU
Keycloakself-hostedFree (self-hosted)
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 (self-hosted)Red Hat SSO (commercial support)
Open Source
Self-Hosted
SDK Languages
javascripttypescriptpythonjavaswiftkotlingo
javascriptjavapythongo
Frameworks
langchainvercel-ai
None listed
Compliance
soc2gdpr
gdpr
Best For
Rapid prototyping and Google-native stacks; low-friction auth for AI apps that don't need agent-specific authorization
Enterprise on-prem identity; legacy system integration; organizations standardized on Red Hat / Java stacks
Limitations
No token delegation, no FGA, no agent SDK; vendor lock-in to Google Cloud; limited authorization model
No agent SDK, no FGA, no human-in-the-loop; UI and developer experience are dated; heavy Java-based deployment
Supported Not supported Unverified