All Comparisons

Fidro vs Stripe Radar

Stripe Radar checks the card when someone pays. Fidro checks the person earlier, at signup and login, and works alongside Radar rather than replacing it.

Last updated: March 2026

What is Fidro?

Fidro is a fraud detection API for developers. One call checks an email address and an IP for disposable domains, VPNs, proxies, Tor and datacenters, remembers earlier signups and logins, and returns a 0 to 100 risk score with an allow, challenge or block recommendation. On the Pro plan it also scores Stripe payments. The free plan includes 200 validations a month, no credit card needed.

Feature Comparison

Feature Fidro Stripe Radar
Email Validation Yes No
Disposable Email Detection Yes No
IP Intelligence Yes Yes
Chargeback Prevention Yes Yes
Risk Scoring Yes Yes
Works Outside Stripe Yes No
Velocity & Anomaly Detection Yes Payments only
Custom Blocklists Yes Yes
Self-Serve Signup Yes Yes
Starting Price Free $0.05/screened transaction

Where Fidro differs from Stripe Radar

Catch it earlier

Radar sees the payment. Fidro sees the signup and every login before it, so fake accounts are stopped before they reach checkout.

Signup checks on any stack

Radar only works inside Stripe. Fidro's signup and login checks are a plain API, so they work whatever payment processor you use. Payment scoring itself is for Stripe, on the Pro plan.

It knows about the email

Radar doesn't check email addresses. Fidro spots disposable domains, missing mail servers and suspicious address patterns before the account exists.

Want to see it first? Check an email for free or browse the disposable email list.

Common questions

Is Fidro a good alternative to Stripe Radar?
Fidro works best alongside Radar rather than instead of it. Radar is built into Stripe and checks the card at payment time. Fidro checks the person earlier, at signup and login, and on the Pro plan scores each Stripe payment again after it completes, so you can refund before a dispute.
How is Fidro different from Stripe Radar?
Radar only sees what happens inside Stripe, at the payment. Fidro starts earlier: it checks the email, the IP and the network when someone signs up, remembers their logins, and returns an allow, challenge or block decision your code can act on. Its signup and login checks work whatever payment processor you use.
Can I use Fidro and Stripe Radar together?
Yes, and they fit well together. Fidro keeps disposable emails and risky networks out at signup. Radar checks the card at payment. On Pro, Fidro scores the completed payment too, using what it already knows about the account.

Switch in an afternoon.

200 free validations a month. No credit card, no sales call.

Start for free Read the docs