SaaS Signup Protection

Q: How do I block fake signups on my SaaS?

Fidro validates email addresses at signup by checking for disposable domains, analyzing IP reputation, and returning a risk score. You can block or flag signups that score above your threshold with a single API call.

Q: What is a disposable email and why should I block them?

Disposable emails are temporary email addresses from services like Guerrilla Mail or Mailinator. They're commonly used to abuse free tiers, create fake accounts, and bypass email verification. Fidro detects over 200,000 disposable email domains.

Q: Does Fidro work with any signup form?

Yes, Fidro is a REST API that works with any tech stack. Call the /v1/validate endpoint during your signup flow and use the risk score to allow, review, or block the signup.

Stop disposable emails, bots, and fraudulent signups from polluting your user base. Validate every signup in real-time with a single API call.

What is Fidro?

Fidro is a fraud detection API that combines email validation, IP intelligence, geolocation analysis, and Stripe chargeback prevention in a single API call. Built for developers at startups and growing companies, Fidro returns a risk score with a clear recommendation — allow, review, or block — so you can stop fraud without building your own scoring logic. Fidro offers a free plan with 1,000 validations per month, no credit card required.

The Problem

Fake signups inflate your metrics, waste infrastructure, and create security risks. Disposable emails bypass verification, bots create thousands of accounts, and fraudsters exploit free tiers.

The Fidro Solution

Fidro validates email addresses, detects disposable domains, checks IP reputation, and returns a risk score — all in one API call at signup. Block bad actors before they enter your system.

Key Features

Disposable Email Detection

Identify and block signups from 200,000+ known disposable email domains instantly.

IP Risk Analysis

Detect signups from VPNs, Tor exit nodes, data centers, and known proxy networks.

Real-Time Risk Scoring

Get an instant allow/review/block recommendation for every signup attempt.

200K+

Disposable domains

<200ms

Response time

1,000

Free validations/mo

Learn more about Fidro

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Frequently Asked Questions

How do I block fake signups on my SaaS?

Fidro validates email addresses at signup by checking for disposable domains, analyzing IP reputation, and returning a risk score. You can block or flag signups that score above your threshold with a single API call.

What is a disposable email and why should I block them?

Disposable emails are temporary email addresses from services like Guerrilla Mail or Mailinator. They're commonly used to abuse free tiers, create fake accounts, and bypass email verification. Fidro detects over 200,000 disposable email domains.

Does Fidro work with any signup form?

Yes, Fidro is a REST API that works with any tech stack. Call the /v1/validate endpoint during your signup flow and use the risk score to allow, review, or block the signup.

How much does signup fraud protection cost?

Fidro offers a free plan with 1,000 validations per month, no credit card required. Paid plans start at $29/month for higher volumes.

Start catching bad signups in the next 5 minutes

Create your account, grab your API key, and send your first request. Free plan with 200 validations/month. No credit card. Cancel anytime.

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