Compare Tools
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Category
Select 2–3 tools to compare
ClerkcloudFree up to 10k MAU
Firebase AuthcloudFree up to 50k MAU
Agent Sdk
Token Delegation
Human In The Loop
Fga
Mcp Support
Async Authorization
Pricing
Free up to 10k MAU$25/mo ProCustom Enterprise
Free up to 50k MAUBlaze pay-as-you-goPhone auth: 10¢/verification
Open Source
Self-Hosted
SDK Languages
javascripttypescript
javascripttypescriptpythonjavaswiftkotlingo
Frameworks
vercel-ailangchainnextjsremix
langchainvercel-ai
Compliance
soc2gdpr
soc2gdpr
Best For
Next.js and React AI apps needing fast auth setup with prebuilt UI components
Rapid prototyping and Google-native stacks; low-friction auth for AI apps that don't need agent-specific authorization
Limitations
JavaScript/TypeScript only; no token delegation or FGA; not designed for complex agent authorization patterns
No token delegation, no FGA, no agent SDK; vendor lock-in to Google Cloud; limited authorization model
Supported Not supported Unverified