🎁 Limited Time Offer: Use WELCOME10 for 10% OFF!

ai AI-Powered Fraud Detection

Real-Time Fake User Protection

OnSefy offers an advanced fraud detection service to safeguard your SaaS, e-commerce and CRM platforms and block fake signups.

Our API integrates seamlessly with your existing systems, learn more in our developer documentation.

Get Started Free How it works?
No Credit Card Required

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What OnSefy Does ?

Protecting Your Platform Starts at Signup

Advanced Fraud Prevention

Smart security for real-time threat protection.

Seamless User Verification

Approve genuine users quick and effortlessly.

Confident & Reliable

Detect fraud instantly and reduce risk.

WHY CHOOSE US

Fake Onboards Cost You
Stop Before They Stop

OnSefy is built to ensure only real users access your platform. With intelligent fraud detection, seamless verification, and real-time protection, we help businesses stay secure and trustworthy—effortlessly.

  • Instantly identify and block suspicious signups.
  • Easy to implement with any platform.
  • We _DO NOT_ use your data
  • No delays, just secure approvals.

Connect Anywhere

Smart AI protection, wherever you build

OnSefy works out of the box with modern frameworks, automation tools, and CMS platforms—making fraud detection seamless wherever you build.

Start Your Journey
OnSefy
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How Does It Work

Follow the minimalistic steps
to start protecting your platform.

Create an Account

Get Your API Key
& Integrate

Start Real-time
Fraud Blocking

Try it for Free, no credit card required

Core Features

Features that help you protect your business

Instant Fraud Detection

Detect and block fake signups in real time with intelligent risk analysis.

AI-Powered Insights

Leverage machine learning to identify patterns and anomalies across user behavior.

Dashboard & Report Charts

Monitor fraud trends and activity with clear, actionable visual reports.

Custom Rule-Based Filters

Define your own fraud criteria to tailor detection to your unique use case.

Your Data is Yours

OnSefy never locks you in—data remains private, portable, and under your control.

Export Data

Easily export fraud logs, analytics, or custom reports whenever you need them.

Our Pricing

Plans that grow with you

🎁 Limited Offer: Use WELCOME10 for 10% OFF!

Free

Best for small projects & testing environments.

No credit card needed

$0.00

Per Month

  • Up to 1K Verification/month
  • Standard Fraud Detection
  • User Risk Score
  • 1 Custom Blacklist Filter Rules
  • 10 Verification/Minute
  • 3-Months Request History
  • Basic support
Get Started
Most Popular

Growth

Best for growing businesses & startups.

* Prices exclude applicable taxes

Per Month

  • Up to 10K Verification/month
  • Advanced Fraud Detection
  • User Risk Score
  • 5 Custom Blacklist Filter Rules
  • 30 Verification/Minute
  • 6-Months Request History
  • Priority support
Get Started

Enterprise

Best for large-scale & high-traffic platforms.

* Prices exclude applicable taxes

Per Month

  • Up to 100K Verification/month
  • Advanced Fraud Detection
  • User Risk Score
  • 10 Custom Blacklist Filter Rules
  • 30 Verification/Minute
  • 1-Year Request History
  • Priority support
Get Started

Need 100 K+

Verification
/Month?

Looking for a custom plan?

Let’s build a solution around your goals — with custom plans built for scale, compliance, and fraud defense. We partner with leading digital companies to offer customized solutions.

Contact Us

FAQ’S

Have a question? Check out the
FAQ

Explore answers to common questions about OnSefy’s fraud detection system — how it identifies threats, prevents fraud, and supports secure growth.

How does OnSefy detect fraudulent signups?

OnSefy leverages advanced data analysis techniques to evaluate various factors such as network activity, user behavior, and signup patterns. By assessing these indicators, it effectively detects and filters out potentially fraudulent signups in real time.

Does your prediction model use my personal or business data for training?

No. Our prediction models are trained without using any personal or user-specific data. We only store limited validation data to provide essential features — such as showing your onboard records, activity history, or service usage. This data is never used for model training or third-party analytics.

📌 You can request deletion of your data at any time, and we’ll permanently remove it from our systems in line with our privacy policy.

Is there a free plan available?

Yes! Our Starter Plan offers up to 1,000 API calls per month for free, perfect for small projects and testing.

How accurate is OnSefy’s fraud detection?

OnSefy uses AI-powered algorithms with a 99.9% accuracy rate in detecting fraudulent signups, ensuring genuine users can access your platform.

Can I integrate OnSefy with my existing system?

Absolutely! OnSefy provides a developer-friendly API that seamlessly integrates with your existing signup flow in just a few steps..

What happens if I exceed my API call limit?

If you exceed your plan's limit, your service may be temporarily restricted. To continue, please upgrade to a higher plan. Note that we do not upgrade plans automatically.

Do you provide customer support??

Yes! We offer customer support tailored to your plan: Free users: Basic email support, Paid plan users: Priority email support, Custom plan customers: Dedicated support representative. We also offer fully dedicated verification servers on demand for enterprise needs.

Security blog tips and tricks

Our recent news & insights

Stay up to date with the latest security insights, tips, and expert commentary. Explore our recent blog posts to stay informed and better protected in a rapidly evolving digital world.

Create a trusted onboarding experience
Get started in minutes!

Effortlessly integrate OnSefy into any tech stack — from custom code to no-code platforms like Zapier — and unlock real-time, reliable fraud protection at every touchpoint.

Get Started Today

  • No credit card required

  • Plug-and-play integration

  • Your data stays private — always

testimonial

What our customer’s say about our company

“Before OnSefy, we spent hours each week reviewing suspicious signups manually. Now, fraud prevention runs quietly in the background—accurate and fast. ”
Sofia Morales

Sofia Morales

Product Manager

“We saw an immediate drop in fake signups after implementing OnSefy. The real-time fraud detection is a game-changer for security. ”
Carlos Rodríguez

Carlos Rodríguez

Chief Technology Officer

“OnSefy gave us confidence to scale without worrying about bots or fake users slipping through. The insights it provides are clear and incredibly helpful. ”
Lina Zhang

Lina Zhang

Head of Growth

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