Don’t Let Fake Users
Slip Through Your Net
Protect your business from fraudulent signups with precision. Our intelligent fraud prevention tool filters out suspicious onboard attempts before they get in.
Easily plug into your current workflow via our powerful API for instant decisioning at the point of registration. Dive into the details in our API guide.
Next-Gen Threat Detection
AI-powered defense against fraudulent activity in real time.
Frictionless Identity Checks
Ensure authentic user access without slowing down onboarding.
Comprehensive Platform Security
Keep imposters out with layered, proactive safeguards.
Instant Fraud Response
Quickly assess threats and stay ahead of evolving risks.
Smarter Safety, Real Users Only
Designed to protect your platform from day one, our system filters out fake accounts and keeps your onboarding flow clean. Through AI-powered screening and instant validation, we make trust a default—no extra effort needed.
- Catch and reject fake signups immediately.
- Machine learning ensures precision checks.
- Integrates easily with your existing setup.
- Scales with businesses of all sizes.
- Analyzes trends to block future threats.
- Smooth and secure user flow, always.
9+ Years
Of experience in business service
Seamless Fit for Any Tech Stack
Integrate effortlessly across various languages and frameworks. Get real-time fraud screening up and running in minutes—no disruptions, just protection.
Get StartedHow It All Comes Together
Just follow a few easy steps to get started.
1 Create Your Free Account
Register on OnSefy to access your risk analysis dashboard and receive your personal API key — no credit card needed.
2Plug & Protect in Minutes
Insert a few lines of code into your app or website. No advanced setup — quick to integrate, even for beginners.
3Prevent Fake Signups
OnSefy evaluates each user pre-signup and assigns a risk score so you can confidently allow, deny, or review entries.
2Plug & Protect in Minutes
Integrate with only a few lines of code on your site or app. No complex setup required — easy enough for anyone to get started quickly.
3Prevent Fake Signups
OnSefy analyzes user data before registration and delivers a risk score, empowering you to accept, reject, or investigate with assurance.
Success Stories
Our customers love what we do! Here's what some of them have to say about their experiences with us.
Carlos Rodríguez
CTO, SecurePay
OnSefy transformed our signup process, eliminating fraudulent accounts effortlessly. Seamless API integration made it a perfect fit for our platform.
Sofia Morales
Product Manager, FinTrust
We saw an immediate drop in fake signups after implementing OnSefy. The real-time fraud detection is a game-changer for security.
Features
Protect your platform with intelligent, privacy-first fraud prevention. Our models deliver high accuracy without relying on any personal user data.
Real-Time Fraud Detection
Shield your signups from threats with intelligent, frictionless detection that adapts as fraud tactics evolve.
- Detect Suspicious Activity – Get instant risk signals during signup.
- User-Friendly – Protect users without slowing them down.
- AI-Driven Accuracy – Smarter decisions, less manual review.
Advanced User Verification
Verify users confidently with layered, intelligent checks that reduce risk without using personal data.
- Email & Phone Intelligence – Spot throwaways and high-risk numbers instantly.
- Device Fingerprinting – Uncover unique device behavior and patterns.
- IP Trust Scoring – Flag VPNs, proxies, and unusual geolocations.
Effortless API Integration
Start protecting your app in minutes with a flexible API that fits into any codebase—no complex setup needed.
- Fast API Setup – Developer-friendly docs and examples.
- Custom Logic Support – Tune your detection rules to your workflow.
- Live Risk Feedback – Monitor events and scores in real-time.
We Simplify Verification—So You Can Focus on Growth
Tired of clunky, outdated verification systems? OnSefy delivers lightning-fast, highly accurate, and fraud-proof user validation—ready to plug in and scale with your business.
Speed That Keeps Up With You
Legacy Tools: Laggy, multi-step checks
OnSefy: Blazing-fast validation in milliseconds
Accuracy You Can Trust
Legacy Tools: High error rates and manual reviews
OnSefy: AI-driven decisions with pinpoint precision
Smarter Fraud Protection
Legacy Tools: Simple rule-based filters
OnSefy: Advanced behavioral analysis powered by AI & ML
Effortless Integration
Legacy Tools: Complex setup and dev time
OnSefy: Plug & play API—live in minutes
Pricing
Find the perfect balance of security and scalability with OnSefy’s flexible pricing plans.
Starter
Best for small projects & testing environments.
Features Included:
- Up to 1K Verification/month
- Standard Fraud Detection
- User Risk Score
- 1 Custom Blacklist Filter Rules
- Analytics Dashboard & Reports
- 10 Verification/Minute
- 3-Months Request History
- Basic support
Growth
Best for growing businesses & startups.
Features Included:
- Up to 10K Verification/month
- Advanced Fraud Detection
- User Risk Score with Patterns
- 5 Custom Blacklist Filter Rules
- Analytics Dashboard & Reports
- 30 Verification/Minute
- 6-Months Request History
- Priority Support
Enterprise
Best for large-scale & high-traffic platforms.
Features Included:
- Up to 100K Verification/month
- Advanced Fraud Detection
- User Risk Score with Patterns
- 10 Custom Blacklist Filter Rules
- Analytics Dashboard & Reports
- 30 Verification/Minute
- 1-Year Request History
- Priority Support
Scaling Fast?
100K+
Verifications per MonthNeed a Custom Plan Built for You?
We work with high-growth startups and enterprises to craft tailored verification solutions. From compliance to scalability and fraud protection, our team will help you build exactly what you need—no bloat, no limits.
Have a question? Check out the FAQ
Find answers to common questions about OnSefy’s fraud detection system.
How does OnSefy detect fraudulent signups?
OnSefy uses real-time AI and behavioral analysis to identify risky signups. By analyzing patterns in IP data, device fingerprints, network activity, and user behavior, we can flag suspicious activity instantly — before it impacts your platform.
Does your model use my personal or business data for training?
No. We do not use personal or customer-specific data for training our models. Your privacy is a priority.
We only store limited validation data to power features like onboard logs, service analytics, and activity history — never for training or external use.
📌 You can request full data deletion at any time, and we’ll erase it permanently in line with our privacy policy.
Is there a free plan available?
Yes! Our Free Starter Plan gives you 1,000 API calls per month — ideal for testing, MVPs, or small-scale apps.
How accurate is OnSefy’s fraud detection?
OnSefy delivers up to 99.9% accuracy in detecting fake or high-risk signups using advanced AI/ML risk scoring and signal aggregation. Our models are constantly evolving to stay ahead of fraud patterns.
Can I integrate OnSefy with my existing system?
Absolutely. OnSefy offers a plug-and-play REST API that integrates easily with any signup form, onboarding flow, or backend — no complex setup needed.
What happens if I exceed my API call limit?
Once you reach your monthly quota, requests may be paused to prevent overuse. You can manually upgrade your plan at any time. We never auto-upgrade without your approval.
Do you offer customer support?
Yes! Support levels depend on your plan:
- Free plan: Email support (response within 48 hours)
- Paid plans: Priority email support
- Enterprise plans: Dedicated success manager + optional private verification servers
Need Help? Our Experts Are Ready!
From setup to advanced fraud defense strategies — our support team has your back. Get fast answers, technical guidance, and personalized help through our dedicated helpdesk.
Start Free – Secure Your Platform Today