Protecting online platforms from fraud
We help marketplaces and classified platforms detect and stop phishing, scam messaging and automated fraudulent activity — free of charge.
Protect Fraud is an independent team of developers working with online platforms to make their users safer.
Fraud operations target platforms at scale
Online marketplaces are continuously targeted by organized fraud operations. Attackers use automated accounts and messaging systems to contact buyers and sellers, move conversations outside the platform, and distribute phishing links through email, messengers and other channels.
Automated scam messaging
Fraudsters use automation to contact large numbers of marketplace users.
Phishing & external links
Victims are redirected to fraudulent payment, delivery or authentication pages.
Large-scale abuse
Modern fraud operations can rapidly create accounts and adapt their behavior to bypass basic protections.
How Protect Fraud helps
We work directly with platform teams to understand how fraudulent campaigns operate and help develop practical mechanisms to detect and stop them.
Fraud pattern analysis.
We analyze scam behavior, attack patterns and abuse mechanisms.
Detection algorithms.
We help design logic and algorithms capable of identifying suspicious activity.
Platform protection.
We help teams strengthen the mechanisms that prevent scammers from reaching users.
Continuous adaptation.
Fraud evolves. Protection mechanisms need to evolve with it.
Experience across major marketplaces
Our team has contributed to anti-fraud efforts for marketplace and classifieds platforms across Europe and other markets.
| 01 | OLX | Multiple markets |
| 02 | Vinted | Europe |
| 03 | willhaben | Austria |
| 04 | Subito | Italy |
| 05 | Wallapop | Spain |
Our focus is measurable impact: reducing fraudulent outreach before scammers can reach platform users.
A safer marketplace ecosystem
Our mission is simple: make large online platforms harder to exploit and their users harder to scam. Fraud operations constantly evolve their infrastructure, automation and social engineering techniques. We believe that collaboration between platform security teams and independent technical researchers can significantly reduce their effectiveness.
Less fraud. Fewer victims. Safer platforms.
Built for platforms with real exposure
- Marketplaces
- C2C and B2C platforms connecting buyers and sellers.
- Classified platforms
- Large classified advertising services exposed to messaging and phishing abuse.
- Online platforms
- Services experiencing coordinated scam campaigns, fraudulent accounts or phishing attacks.
If your platform is currently experiencing large-scale scam messaging or phishing activity, our team is open to discussing the problem.
Let's fight fraud together
If you represent a marketplace or online platform and are dealing with organized scam activity, phishing campaigns or automated fraudulent messaging, contact our team.
Technical collaboration is provided free of charge.