According to AlphaMoat, as of 2026-09, the Chrome extension CoinsWorth has 26 users (-3.7% MoM) — ranked #6,844 of 9,324 AI browser extensions, and #94 of 123 in Other Industries.
What is CoinsWorth
Spot undervalued coins instantly! AI grade predictions & market value estimates on Heritage Auctions & GreatCollections listings. **Stop guessing. Start knowing what a coin is really worth.**
CoinsWorth gives you an expert-level second opinion on every coin listing you browse on GreatCollections and Heritage Auctions — instantly, automatically, and without lifting a finger.
Whether you're bidding at auction or browsing new inventory, CoinsWorth analyzes each listing in real time and tells you if the coin is undervalued, fairly priced, or one you should skip.
---
⚙️ **How It Works — 3 Seconds, Zero Effort**
1. Browse any coin listing on **GreatCollections.com** or **HA.com**. 2. CoinsWorth automatically appears with a full analysis — no clicks, no typing. 3. You instantly know whether it's a smart buy or a pass.
Show the rest of the store description▾
It's like having a seasoned numismatist watching every listing with you.
---
💡 **What You'll See on Every Listing**
- **Grade Check** — Is the listed grade accurate? CoinsWorth predicts whether the coin is likely to upgrade, hold, or downgrade on a resubmission, so you can spot hidden value others miss.
- **Price Check** — Is the asking price fair? Get a real-time market value estimate based on recent comparable sales data, not guesswork.
- **Buy / Don't Buy Signal** — CoinsWorth gives you a clear recommendation: bid with confidence, proceed with caution, or walk away. No more second-guessing.
---
👤 **Built For**
- **Collectors** who want more confidence and fewer regrets on every purchase.
- **Investors** looking to maximize returns by identifying undervalued coins before the market catches on.
- **Beginners** who want to stop relying on gut instinct and start making data-backed decisions.
---
🔥 **Key Features**
✅ Works automatically on GreatCollections.com and Heritage Auctions (HA.com) — no setup required. ✅ Predicts likely regrade outcomes so you can find coins with upgrade potential. ✅ Estimates current fair market value using real comparable sales data. ✅ Flags overpriced or risky listings with clear, visual warnings. ✅ Inline summary widget appears right on the listing page for at-a-glance insights.
---
🔓 **Free to Try — No Strings Attached**
Your first coin evaluations are completely free. See exactly how CoinsWorth works and the value it provides before committing to anything. Love it? Subscribe for unlimited analysis. No ads. No gimmicks. Ever.
---
🔒 Your Privacy
CoinsWorth reads coin listing page content (text and images) to perform its analysis. We also collect basic usage analytics to improve the service. We never sell your data. Read our full privacy policy at coinsworth.com/privacy.html.
---
👉 **Install CoinsWorth now and never overpay for a coin again.**
Extension profile
User Growth Trend
Popular in Other Industries
Protect your privacy and uphold Islamic values by auto detecting & blurring images and videos of unwanted or impermissible content.
+ Compare
Currency converter & calculator with live exchange rates, charts & AI price detection. 170+ currencies, private, free to use.
+ Compare
Machine learning based match outcome predictor for CS2 matches on FACEIT
+ Compare
L'algoritmo ti dice se conviene comprare ora o aspettare. E ti avvisa su WhatsApp e sull'email appena il prezzo scende
+ Compare
Data month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.