Stops scams before they happen. Right in your browser.
45-240x less scams.
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Safety. Before the Scam.
ALSO AVAILABLE ON MICROSOFT EDGE, FIREFOX, BRAVE, OPERA, VIVALDI
No sign-up required. Install in seconds. Works instantly.
Trusted on top marketplaces by buyers and sellers
Meet Monty
The intelligent fraud assistant that protects you from marketplace scams.
Monty sits in your browser and spots
red flags you'd never notice in real-time.
Like having 100 fraud analysts in your browser, Monty
protects you before scams even happen - so you can buy and
sell with peace of mind.
Prevention. Not Cure
A scam occurs every 7 seconds.
Scams evolve faster than platforms can adapt.
Current marketplaces were designed to move buying and selling online in the early internet era—not to prevent fraud. This is why it's all so messy today.
Their fraud prevention is reactive at best, leaving users to deal with the mess after the damage is done. Prevention is better than cure especially when the cure is poorly designed, inconsistent, and costs billions in losses every year.
Monty eliminates the 'scam-tax' on marketplaces, in an era where scams are becoming increasingly sophisticated. Instantly detects scams, and gets explainable risk scores.
Explore Plans
Free
For casual buyers and sellers
- 20 free scans per month (resets monthly)
- Scam detection and analysis with basic explanations
- Works on eBay, Facebook Marketplace, and Vinted
- Basic support via email
£0
Free forever
Pro
For those serious about preventing scams
Everything in Free, plus:
- Unlimited scans
- Advanced scam analysis with in depth explainability
- Scam likelihood summary on hover
- Enhanced Capabilities for sellers
- Deep pattern analysis and account anomalies
- Early access to new features
- Priority email support
£19
Per month for unlimited scans. Cancel anytime.
Feature Comparison
| Feature | Free | Unlimited |
|---|---|---|
| Scans Per Month | 20 free scans | Unlimited scans |
| Pricing | Free, then 1p per scan | £19/month |
| Scam Detection Alerts | Basic alerts for obvious scams | Advanced alerts that catch subtle, sophisticated scams most people miss |
| Risk Assessment | Simple "risky" or "safe" scoring | Detailed explanation of exactly why a listing is suspicious with specific warning signs |
| Quick Information | Must click for details | Instant summary appears when you hover your mouse over listings |
| Personalization | Fixed detection settings | Customize how Monty works based on your preferences and needs |
| Learning From You | Limited ability to learn from your feedback | Gets smarter over time based on your specific feedback and browsing patterns |
| Seller Background Analysis | Basic seller information check | Deep analysis of seller history, patterns, and red flags from across the platform |
| Message Safety Checker | Not available | Analyzes profiles of buyers/sellers to detect manipulation and scam attempts |
| "Speak to Monty" Chatbot | Unlimited free follow-ups to ask questions and get deeper insights into scan results | Unlimited free follow-ups with enhanced explanations and detailed risk context |
Incentives for Both Plans
Invite friends to earn extra scans
High-volume sellers may qualify for discounted or unlimited plans
Frequently Asked Questions (FAQs)
What is Monty?
+Monty is a real-time AI browser extension that protects you from scams on marketplaces. It flags subtle and not-so-subtle red flags you might miss, acting like a team of fraud analysts in your browser.
How does Monty work?
+It can be downloaded from the Chrome Web Store and is also available for browsers like Edge, Firefox, Brave, Opera, and Vivaldi through their extension stores. It works by combining marketplace-specific signals (like image metadata, buyer behavior, listing patterns) with risk scoring models. The goal isn't to block everything—it's to give you context so you can make smarter, safer decisions without needing to be a scam expert.
What kind of scams can Monty help prevent?
+Monty isn't a generic cybersecurity tool designed for phishing emails or sketchy websites.
Here are some examples Monty can help flag early:
Listings that aren't as described – the most common type of scam
Fake listings – where the seller never had the item to begin with
Potentially fraudulent buyers
Sellers misrepresenting item condition – subtle but harmful
Return scams – especially common with high-value items
Is my data safe?
+Yes. Monty does not store or share any personal data. All scam detection runs locally or with privacy-first cryptographically secure infrastructure.
How does Monty work for buyers and sellers on eBay?
+Monty analyzes marketplace data directly in your browser.
For buyers: It scans listings in real time, analyzing listings contextually.
For sellers: It analyzes incoming orders and buyer details to flag potential fraud.
It operates passively — no actions are taken, only explainable insights are shown.
Does Monty penalize new or infrequent buyers/sellers?
+No— we don't raise red flags just because a buyer or seller is new or infrequent. Monty doesn't use simple rule-based logic. It uses contextual reasoning based on relational marketplace factors — meaning it evaluates factors in relation to one another, not in isolation.
Which platforms does Monty support?
+The first public release will support eBay (UK & US).
Vinted and Facebook Marketplace will be supported in private early access, with a public release planned for June 2025.
More platforms may be added soon based on user demand.
When will Monty be released?
+The first public version of Monty is expected between mid to late Spring 2025.
We're alreadyoffering early access to selected users before then — by request only.
Early versions are being used selectively to optimze accuracy and performance.
What countries does Monty currently operate in??
+Monty currently only supports marketplaces in the United Kingdom and the United States
Do I need to sign up to use Monty?
+No sign-up is required. Simply install Monty and start getting real-time scam protection instantly. *Please note— for full functionality, make sure you're logged into your marketplace account.
Is Monty free to use?
+Yes, Monty is free to use with 20 free scans per month. After that, you pay just 1p per scan with our Pay-As-You-Go model. Power users can upgrade to unlimited scans for £19/month.
Will it slow down my browser?
+No. Monty runs lightweight and only activates when you're on supported marketplaces. It won't affect your normal browsing.
How is Monty different from other security tools?
+Current security tools don't understand or adapt to marketplace context. They act on obvious, isolated signals—like sketchy URLs, or isolated signals. But scams are often non-obvious and counterintuitive. Monty reasons contextually, spotting what others miss.
Monty also learns with every scan. The more you use it, the better it gets at understanding your risk preferences and spotting context-specific red flags — without making assumptions or acting on your behalf.
How accurate is it?
+While no system is 100% perfect, Monty is specifically designed to identify marketplace scams with exceptional precision and accuracy, even as scam tactics evolve. It uses advanced AI learning techniques and continuous human expert feedback to constantly improve its detection capabilities.
Does Monty work on mobile?
+Currently, Monty only works on desktop browsers only.
What are credits and scans?
+Credits are your currency for using Monty. Each credit allows you to perform one scan.
A scan happens when Monty analyzes something for you - each time Monty checks a listing, examines a profile, or runs a risk assessment, that counts as one scan and uses one credit.
Note: Using 'Speak to Monty' chatbot feature is completely free and doesn't use any credits. This allows you to follow up after any risk assessment to ask questions about why something was flagged as risky, get additional context about suspicious patterns, or request deeper insights into specific warning signs without using additional credits.
Can I control when Monty uses scans?
+Yes, you're in full control.
You can choose whether:
- Monty scans automatically in the background (e.g., auto-analyzing buyers or listings), or
- You enable Monty manually for each scan
How to report false positives?
+Monty is designed to be cautious, which means it may occasionally flag a listing that turns out to be completely safe. This is called a false positive, and while it's not ideal, it's an expected tradeoff in building a model that errs on the side of user safety.
Reporting False Positives
If you come across a false positive, the easiest way to report it is by clicking the thumbs-down icon after the scan results appear. You'll be prompted to leave optional feedback. This kind of input is extremely useful for improving Monty's models over time.
Monty isn't showing up on listings—what do I do?
+If Monty isn't appearing or working correctly, first ensure you're on a supported marketplace (eBay, Vinted, or Facebook Marketplace) and refresh the page, as Monty analyzes pages after they finish loading and may miss listings with dynamic content.
Next, confirm that Monty is enabled in your browser extensions settings by opening the extensions menu and verifying Monty is active, and disable any ad blockers or privacy extensions that might block Monty from accessing page elements.
If the issue persists, try reinstalling the extension, clearing your browser cache, or contacting support with a screenshot and the listing URL.