We're building the first AI fraud agents for marketplaces

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.

Think of Monty like Grammarly—but for online marketplaces. Just like Grammarly looks at your writing and flags things that seem off, Monty scans marketplace listings and interactions in real-time, flagging risks before you buy or sell.

It works by combining marketplace-specific signals (like seller history, item pricing, image 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.

You don't need to understand AI. Monty doesn't ask you to change how you use the app. It is never in your face, but always paying attention. You use the app like normal; it just makes sure nothing feels off while you do.

Monty isn't a generic cybersecurity tool designed for phishing emails or sketchy websites—it's built specifically for on-platform marketplace scams, the kind that happen on eBay, Facebook Marketplace, and similar platforms.

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 – especially ones who overpay, request off-platform chats, or raise return flags
Sellers misrepresenting item condition – subtle but harmful
Return scams – especially common with high-value items

Monty can't stop every scam, but it's designed to help you see what most users miss—before you commit to a deal.

Yes. Monty does not store or share any personal data. All scam detection runs locally or with privacy-first cryptographically secure infrastructure.

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.

The agent operates passively — no actions are taken, only explainable insights are shown.

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.

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.

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.

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.

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.

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.

Yes. Monty helps sellers by analyzing buyer behaviour and flagging suspicious behaviour.

No. Monty runs lightweight and only activates when you're on supported marketplaces. It won't affect your normal browsing.

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.

Monty is highly accurate, trained on billions of data points from real marketplace transactions. It uses advanced AI learning techniques and continuous human expert feedback to constantly improve its detection capabilities. While no system is 100% perfect, Monty is specifically designed to identify marketplace scams with exceptional precision and accuracy, even as scam tactics evolve.

Currently, Monty works on desktop browsers only (Chrome). Mobile support is currently not available, but will be soon.

Pro users choose between AI models, or select a "lightweight fast mode" for quicker scans.

• ⚡️ Speed Mode (Fast local model)
• 🔍 Standard
• 🧠 Deep Insight

Our simple pricing works like this:

• Free: 20 scans per month
• Pay-As-You-Go: Just 1p per scan after free scans are used
• Unlimited: £19/month for unlimited scans

Each scan uses Monty to analyze:

• 🔍 A marketplace listing
• 💬 A buyer/seller profile
• 🧠 A detailed risk assessment

The "Speak to Monty" chatbot feature is completely FREE and doesn't use any credits. This allows you to follow up on any risk assessment to get additional context and deeper insights about why something was flagged or why a particular risk score is high.

Users can select whether Monty scans automatically in the background, or when Monty has to be manually enabled each time.

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.

Importantly, 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.

Here's what counts as a scan in Monty (1 scan = 1 credit):

• Analyzing a marketplace listing
• Checking a buyer/seller profile
• Running a deep risk analysis

Remember: Using the "Speak to Monty" chatbot is completely free and doesn't use any credits. You can use it to follow up on any scan result to get deeper insights into why something was flagged as risky or to better understand the context behind a risk assessment.

• Free Plan: 20 scans per month (resets monthly)
• Pay-As-You-Go: After free scans, just 1p per scan
• Unlimited Plan: £19/month for unlimited scans

Our pricing is simple and transparent:

• Free: 20 scans per month with no credit card required
• Pay-As-You-Go: Once you use your free scans, you're charged just 1p per scan
• Unlimited: £19/month for unlimited scans

No hidden fees. No minimum spend. You only pay for what you use.

Yes, you're in full control.

You can choose whether:

• Monty scans automatically in the background (e.g., auto-scanning listings), or
• You enable Monty manually for each scan

"Speak to Monty" is always manual. It gives general scam guidance and never runs in the background.