One API validates emails, fingerprints devices, and blocks bad actors in under 200ms. Ship fraud protection in minutes, not months.
Genuine user, clean signals
Every fake signup costs you money -- infrastructure, support, polluted analytics, and conversion rates that lie.
Infra, support, polluted funnels, and subsidized abuse -- all preventable with a single API call.
Endless new accounts to exploit your free tier forever.
Disposable emails you can never reach, let alone convert.
Competitors lurking inside your product, stealing your playbook.
Bots flooding your funnel and destroying your growth data.
Vouch fuses email intelligence, device fingerprinting, and threat data into a single decision returned in under 200ms.
160K+ disposable domains tracked. MX verification, catch-all detection, alias unmasking, role-account filtering, and real-time reputation scoring -- all in one call.
Persistent identity from 50+ signals. Survives incognito, browser switches, and cookie clears.
1.62M+ VPN, proxy, and TOR IPs. Data center detection + live reputation.
Allow, flag, or block -- with a confidence score you can tune to your risk tolerance.
Typed SDKs for React, React Native, iOS, Android, Node.
Track threats, tune rules, and export logs in real time.
Stop building fraud detection from scratch. Vouch integrates in minutes with typed SDKs for every major platform.
import { useVouch } from '@vouch/react'
function SignupForm() {
const { validate, fingerprint } = useVouch()
const handleSubmit = async (email: string) => {
const result = await 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 behind the scenes -- no UI changes required.
Our engine scores 50+ signals and returns a risk decision in under 200ms, every time.
Allow legitimate users instantly, challenge edge cases, block known abusers. You stay in control.
Real reports from teams who stopped subsidizing fraud.
"We cut fraudulent trial signups by 94% in the first week. It felt like we hired an entire fraud team for the price of a seat."
"The API is brutally simple. Dropped it in before lunch, shipped to prod by the afternoon. Dashboards made the ROI obvious to the CFO."
"Our conversion metrics finally tell the truth. We stopped optimizing for bots and started seeing real signal from real users."
Start free. Scale as you grow. No surprises.
Join growth and security teams protecting their funnel with Vouch. Free to start, no card required.