Stop spam and abuse before they start

Clearbit Risk uses email and IP addresses to identify fake and fraudulent accounts. Since each sign-up is automatically assigned a risk score, you can trigger additional fraud-prevention steps for high-risk signups.

Broad sources = better data

Clearbit’s proprietary technology takes hundreds of data sources into account — like signup velocity and device fingerprints — to calculate accurate risk scores.

A fully flexible solution

Every company's sign-up process is different. But with Clearbit Risk, it's easy to integrate custom abuse prevention steps into your unique signup flow.

Eliminate bad signups

Clearbit Risk flags email addresses that look temporary, undeliverable, or just plain fake. Couple that with detecting proxy servers and VPNs, and you've identified most low quality signups.

What comes next is up to you. Choose to block them completely, request additional information, or require a professional email address for sign up.

Protect your valuable resources

While you may tout a free trial, you know that each signup actually uses precious financial and human resources — so don’t let spammers waste your time or money. Advanced criteria like email age and associated social media activity help catch bots and spam.

Simplify signup for real people

CAPTCHAs and authentication fields are no longer needed when you automatically weed out bad signups. With Clearbit Risk, you can shorten sign up forms, streamline the process, and generate even more legitimate leads.



Monthly API requests

Proxy detection

Detect IP addresses using proxy servers

Disposable email detection

Detect fake and disposable emails

Advanced heuristics

Score signups based on email age, social media activity, and behavior

Starts at


Starts at

Requests Up to 25k / month
Disposable email
Advanced heurisitics

”With Clearbit, the integration took a few hours to complete, and the on-boarding process was instant — a lot simpler than the past provider.“

Ali Nizameddine - Payza

It's a little bit of magic for our users, and Clearbit's APIs are essential to that experience.

Head of Product, Synap

Clearbit data has been immensely helpful in identifying which leads within Salesforce we want to focus on. In addition, the support from the team at Clearbit has been incredible!

Director of Sales, Flexport

Clearbit saves me a ton of time in lead research, and having full lead profiles automatically available is amazing. I recommend Clearbit daily.

Head of Sales,