We're building the first generation of consumer-facing AI safety agents
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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 on eBay, Facebook
Marketplace & Vinted.
CURRENTLY DESKTOP ONLY, MOBILE COMING SOON
Meet Monty
Our flagship AI safety agent that protects you from scams on marketplaces
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
Trusted on top marketplaces by buyers and sellers
Since 2021, over £5 billion has been lost globally to marketplace scams,
with a scam occurring every seven seconds.
Current marketplaces weren't built for
security; they were built to move buying and selling online. And that
worked, until scams became part of the experience.
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 bad and costs billions in losses every year.
Monty is a new kind of intelligence, designed not just to act, but to protect and prevent.
Explore Plans
Free
For casual buyers and sellers
- 20 free credits 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:
- 500+ credits per month
- 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
£7
Per month with annual subscription discount; £84 billed up front. £15 if billed monthly.
What Are Credits?
Credits are the internal currency Monty uses to perform actions. Each scam scan—whether it's analyzing a listing, scoring a buyer message, or reviewing seller history—costs a small number of credits.
Feature Comparison
| Feature | Free | Pro |
|---|---|---|
| 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 |
Incentives for Both Plans
- Invite friends to earn extra credits
- 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 like eBay, Facebook Marketplace, and Vinted. 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?
+Monty scans marketplace listings, seller profiles, and messages in real-time using machine learning and fraud detection algorithms. It identifies patterns based on billions of data points, scam data and warns you before transacting with risky sellers or buyers.
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, checking seller trust, pricing logic, suspicious keywords, and scam signals.
For sellers: It analyzes incoming orders and buyer details to flag potential fraud (e.g., mismatched addresses, odd behavior patterns).
The agent 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 a hypergraph of marketplace factors — meaning it evaluates factors in relation to one another, not in isolation. A private or new seller isn't flagged unless patterns suggest real risk.
Monty also learns over time. 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.
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.
We're starting with eBay first to fine-tune performance, ensure accuracy, and build a strong foundation before expanding to other platforms. 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 offering early access to selected users before then — by request only.
Because Monty is still learning, early versions are being used selectively to improve accuracy and performance.
What countries does Monty currently operate in??
+Monty currently supports marketplaces in the United Kingdom and the United States, including platforms like eBay.co.uk, eBay.com, Facebook Marketplace, and Vinted. We're starting with the UK and US to ensure the highest accuracy and contextual performance. While we'd love to support more countries in the future, we can't promise any specific rollouts. That said, if we see significant demand from a particular region, expanding support may become a consideration.
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 a limited number of free scam detection credits per month. Power users can upgrade to access premium features and unlimited scans.
Can sellers use Monty too?
+Yes. Monty helps sellers by analyzing buyer behaviour and flagging suspicious behaviour.
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.
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 is Monty different from other security tools?
+Monty isn't a traditional security tool. It's purpose-built for marketplace fraud, giving you insights tailored to buying and selling, not generic threats.
Unlike antivirus software that focuses on malware, or ad-blockers that filter content, Monty specifically analyzes marketplace behaviors, seller patterns, and transaction risks. It understands the context of buying and selling online, which allows it to recognize subtle scam signals that general security tools would miss.
Monty also provides actionable explanations rather than just alerts—it tells you why something looks suspicious and what specific red flags it's spotting in each unique situation.
Generic security tools are designed to check if a site is fake or has technical vulnerabilities, but they can't understand the context within legitimate marketplaces. There's no other context-aware agent or tool designed specifically to provide scam and red flag insights within the platforms themselves. Monty operates where traditional security ends—inside legitimate marketplaces where scammers exploit trust, not technical vulnerabilities.
How accurate is it?
+Monty is trained on billions of data points and constantly improves itself via reinforcement learning and manual human feedback. While no system is 100% perfect, it's built to flag risk with high precision.
Does Monty work on mobile?
+Currently, Monty works on desktop browsers only (Chrome). Mobile support is currently not available, but will be soon.
What models are used and how do credits work?
+Pro users choose between AI models, or select a "lightweight fast mode" for quicker scans.
- ⚡️ Speed Mode (Fast local model)
- 🔍 Standard
- 🧠 Deep Insight
Run out of credits? Just top up anytime:
- £3 → 100 credits
- £10 → 500 credits
- £25 → 1500 credits
Credits are used to perform key actions inside Monty:
- 🔍 Scanning a listing = 1 credit
- 💬 Analyzing buyer/seller profiles = 1–3 credits
- 🧠 Deep buyer/seller analysis = 5+ credits
- ✍️ Speak to Monte replies = 1 credit per response
Users can select whether Monty autonomously uses credits and acts in background, or when Monty has to be manually enabled each time. For Speak to Monte, it's always manual and acts as general guidance for avoiding scams.
1 credit = 1 action. Simple and flexible.
What are Monty credits?
+Credits are Monty's internal currency. Each scam-related action costs a small number of credits. It's simple: 1 credit = 1 action.
What can I do with my credits?
+Here's how credits are used inside Monty:
- Scanning a listing = 1 credit
- Analyzing buyer/seller profiles = 1–3 credits
- Deep buyer/seller analysis = 5+ credits
- "Speak to Monty" replies = 1 credit per message
How many credits do I get on each plan?
+- Free Plan: 20 credits per month (resets monthly)
- Pro Plan: 500+ credits per month
- You can also top up your credits any time
How do top-ups work?
+Run out of credits? Just top up whenever you need:
- £3 → 100 credits
- £10 → 500 credits
- £25 → 1500 credits
No limits. No hidden fees.
Can I control when Monty uses credits?
+Yes, you're in full control.
You can choose whether:
- Monty acts automatically in the background (e.g., auto-scanning listings), or
- You enable Monty manually per scan
"Speak to Monty" is always manual. It gives general scam guidance and never runs in the background.