Auth & User Management

Stytch

Modern authentication platform with passwordless login, SSO, MFA, and fraud prevention — built for B2B and consumer apps with a generous free tier.

★★★★☆8/10

authpasswordlessssofraud-prevention

8/10

Verdict

Best for B2B SaaS apps that need enterprise SSO, SCIM provisioning, and fraud prevention without managing auth infrastructure.

Features9/10Ease of Use7/10Pricing8/10Documentation9/10

Use Cases

Add enterprise SSO (SAML/OIDC) to a B2B SaaS product for up to 5 customer organizations on the free tier

Build a consumer app with passwordless login (magic links + social OAuth) and fraud detection at zero auth cost

Set up SCIM provisioning for automatic user sync between customer identity providers and your app

Free Tier

10K MAU, unlimited orgs, 5 SSO/SCIM connections, 1K M2M tokens, no credit card

How to Maximize the Free Tier

Stytch's 10K MAU free tier is the most generous among hosted auth providers alongside Clerk. Enable passwordless methods (email magic links, SMS OTP) immediately — they're all included. The 5 free SSO/SCIM connections cover most B2B SaaS needs for up to 5 enterprise customers. Use M2M tokens for service-to-service auth without hitting user limits. Watch SMS costs: Stytch passes through carrier rates with no markup, but international SMS adds up fast. Combine with their fraud prevention (device fingerprinting) — first 10K fingerprints are free — to catch suspicious logins early.

Getting Started

Sign up at stytch.com (no credit card) → create a project → choose B2B or Consumer vertical → copy your project ID and secret → install the Stytch SDK for your framework → configure a login flow (email magic links, OAuth, or passwords) → test in sandbox mode → go live.

Pros

Enterprise features free: SSO, SCIM provisioning, and M2M tokens on the free tier — features that competitors gate behind expensive plans
Fraud prevention: Built-in device fingerprinting and bot detection included free — most auth platforms charge extra or don't offer this
Flexible auth methods: Email magic links, SMS OTP, OAuth, passwords, and passkeys all available — pick the right method per use case

Cons

SMS costs: SMS OTP passes through carrier rates ($0.005–$0.05 per message depending on country) — not free even on the free tier
Complexity for simple apps: Stytch's full feature set (B2B orgs, SSO, SCIM) can feel over-engineered if you just need basic login/logout
Vendor lock-in risk: Deep integration with Stytch's SDK and dashboard makes migration to another provider non-trivial

Alternatives

Clerk8/10★★★★☆Auth08/10★★★★☆Logto8/10★★★★☆

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