One tool to validate emails, fingerprint devices, and block bad actors. Ship fraud protection in minutes, not months.
Every fake signup costs you money. Infrastructure, support, polluted analytics, and trials that never convert.
Users create endless accounts to exploit your free tier forever
Disposable emails mean you can never reach or convert them
Competitors lurking in your product, stealing your playbook
Bots flooding your funnel and destroying your growth data
Vouch combines email intelligence, device fingerprinting, and threat detection into a single call that returns in milliseconds.
Powered by a database of 160K+ disposable domains, Vouch validates MX records, catches aliases and role addresses, and runs advanced reputation checks to detect high-risk and temporary email services.
Create a persistent device identity from 50+ browser and hardware signals. Detect returning users even in incognito mode, across browsers, and after cookie clearing.
Powered by a database of 1.62M+ VPN, proxy, and TOR IPs, Vouch identifies data centers and runs real-time reputation checks. Comprehensive threat intelligence blocks suspicious networks, anonymized traffic, and known bad actors.
Get allow, flag, or block in under 150ms. Configure thresholds for your risk tolerance.
SDKs for popular client and server libraries. React, React Native, iOS, Android, Node.js, and more. Ship in minutes.
Monitor validation patterns, track blocked threats, and gain insights into your signup quality. Visualize fraud trends and optimize your protection rules with live data.
Stop spending months building fraud detection. Vouch integrates in minutes with SDKs for every major framework.
import { Vouch } from '@vouch/node';
const vouch = new Vouch('your_api_key');
// In your signup handler
const result = await vouch.validate(email, fingerprint);
if (result.recommendation === 'allow') {
createUser(email);
}Three steps to fraud-free signups
Our SDK silently collects device signals and validates the email in the background
Our engine analyzes 50+ signals and returns a risk score in under 150ms
Allow legitimate users through, challenge suspicious ones, block known abusers
Start free. Scale as you grow. No surprises.
Join thousands of SaaS teams protecting their growth with Vouch.