Automatic VOIP blocking & AI fraud detection. Deploy in 5 minutes.
Prevent fake signups before they hit your payment system. From $39/month.
import Auth1 from '@auth1/sdk';
const auth = new Auth1({
apiKey: process.env.AUTH1_KEY
});
// Send verification code
await auth.verify(email, phone);
// ✅ VOIP detection included
// ✅ Fraud protection enabled
// ✅ Custom branding readyComplete fraud protection when you use Auth1 + Stripe together
Handles payment fraud
Handles signup fraud
Stop fraud at signup AND payment
Already using Stripe? Add Auth1 in 5 minutes.
Start Free TrialEnterprise-grade authentication with built-in fraud protection. No hidden fees. No surprises.
Automatically block fake phone numbers. Stop fraud before it starts. Powered by ML.
Every user gets a 0-100 fraud risk score. You decide the threshold.
Your brand in SMS messages. Perfect for white-label apps.
< 100ms response time globally. Edge-optimized infrastructure.
Deploy on your servers. No vendor lock-in. Full source code.
Passwordless authentication. Better security, better UX.
Side-by-side with Auth0, Firebase, and Clerk
| Feature |
auth1
|
Auth0 | Firebase | Clerk |
|---|---|---|---|---|
| Price (10k users/mo) | $99 6x cheaper | $600 | Free* | $250 |
| VOIP Detection | ✓ Built-in | ✗ | ✗ | ✗ |
| Fraud Protection | ✓ Included | +$500/mo | ✗ | ✗ |
| Self-Hostable | ✓ Full source | ✗ | ✗ | ✗ |
| Setup Time | 5 min | 30 min | 15 min | 20 min |
| Custom SMS Branding | ✓ Unlimited | Limited | ✗ | ✓ |
| Response Time | < 100ms | ~200ms | ~150ms | ~180ms |
* Firebase free tier has strict limits and no fraud protection
No hidden fees. No surprise charges. Cancel anytime.
Perfect for small apps
14-day free trial • No credit card required
For growing applications
14-day free trial • No credit card required
For production apps
14-day free trial • No credit card required
For large-scale deployments
Yes! Every tier includes automatic VOIP blocking and AI fraud protection. This typically saves $10k+/year in fraud losses.
You'll be charged per SMS at the overage rate shown. We send alerts at 80% and 100% usage so you're never surprised.
Yes! All plans support BYOT (Bring Your Own Twilio) or you can use our managed Twilio integration.
You choose a plan or cancel. No automatic charges. No credit card required to start the trial.
Yes! Upgrade or downgrade instantly. Prorated automatically. No penalties or fees.
Yes! Open source code available on GitLab. Self-host for free (no fraud protection) or use our managed service.
Join companies saving $6,000/year on authentication
14-day free trial • No credit card required • Cancel anytime