Why developers choose Signonix

The simplest way to verify user emails. No OAuth complexity, no password databases, no vendor lock-in.

The problem with most auth solutions

Most authentication platforms are designed for enterprise use cases. They force you to manage OAuth flows, configure identity providers, handle password resets, and navigate complex SDKs. For apps that just need to know "does this user own this email?" — that's massive overkill. You end up with thousands of lines of auth code for what should be a simple question.

Detailed Comparison

How Signonix stacks up against Auth0, Firebase Auth, Clerk, and Supabase Auth across the categories that matter.

1 Setup Complexity

Signonix
✓ Add one redirect link. That's it. No SDK, no backend, no config files.
Auth0
Install SDK, configure tenant, set up connections, handle callbacks, manage tokens.
Firebase Auth
Install Firebase SDK, initialize app, configure auth providers, handle state.
Clerk
Install SDK, add provider wrapper, configure components, handle sessions.
Supabase Auth
Install client, configure project, set up auth schema, handle tokens.

2 Minimum Code

Signonix
✓ 3 lines — redirect + read hash. That's a complete integration.
Auth0
~100 lines — SDK init, login, callback, token management.
Firebase Auth
~50 lines — SDK init, auth state listener, sign-in flow.
Clerk
~30 lines — provider setup, components, hooks.
Supabase Auth
~40 lines — client init, auth flow, session management.

3 Backend Required

Signonix
✓ No — works with static HTML, GitHub Pages, Netlify, any CDN. Zero server-side code.
Auth0
Yes — requires server-side SDK or API calls for proper security.
Firebase Auth
Yes — Firebase Admin SDK needed for server-side token verification.
Clerk
Yes — backend SDK required for session verification and API protection.
Supabase Auth
Yes — Supabase client needed; Row Level Security policies for server-side logic.

4 What You Get

Signonix
✓ Verified email + stable pseudonymous user ID. That's it. Simple.
Auth0
Full identity platform — users, roles, permissions, sessions, MFA, SSO, and more.
Firebase Auth
Full identity platform — multiple providers, user management, custom claims, MFA.
Clerk
Full identity platform — user profiles, org management, session handling, embeddable UI.
Supabase Auth
Full identity platform — multiple providers, row-level security, session management.

5 Privacy

Signonix
✓ Minimal data. App-scoped IDs prevent cross-app tracking. Users control consent.
Auth0
Full user profiles stored in Auth0's cloud. Subject to Auth0's data policies.
Firebase Auth
Tied to Google account ecosystem. User data stored in Google's infrastructure.
Clerk
Full user management platform with PII storage. Clerk holds your users' personal data.
Supabase Auth
User data stored in your Supabase project. You manage the database, but Supabase has access.

6 Pricing

Signonix
✓ Free up to 1,000/month. From $10/mo with soft overages — your users never get locked out.
Auth0
Free up to 7,500 active users, then $23/mo+. Pricing scales with features and users.
Firebase Auth
Free tier, then pay-as-you-go. Complex pricing tied to broader Firebase usage.
Clerk
Free up to 10,000 MAU, then $25/mo+. Per-user pricing can add up quickly.
Supabase Auth
Free up to 50,000 MAU, then $25/mo+. Auth pricing bundled with database and storage.

7 Vendor Lock-in

Signonix
✓ None. Static IDs are derived deterministically. Switch anytime — no data migration needed.
Auth0
High. User data, auth flows, rules, and SDKs all tied to Auth0's platform.
Firebase Auth
High. Deep integration with Firebase/Google ecosystem makes migration difficult.
Clerk
Moderate. Proprietary components and API. User data export available but migration requires code changes.
Supabase Auth
Moderate. Open-source based, but auth logic tied to Supabase's GoTrue fork and RLS policies.

Is Signonix right for you?

Signonix does one thing extremely well. Here's how to know if it's the right fit.

When to use Signonix

  • Side projects and MVPs that need email verification fast
  • Static sites and JAMstack apps with no backend
  • Apps that only need "who is this user?" without full identity management
  • Privacy-conscious apps that want minimal data collection
  • Projects where simplicity matters more than features

When NOT to use Signonix

  • You need password-based login
  • You need SSO/SAML for enterprise customers
  • You need roles, permissions, or user management built-in
  • You need social login (Google, GitHub, etc.)

Ready to simplify your auth?

Set up in under 5 minutes. No SDK to install, no backend to configure.

Get Started Read the Docs