CaratRank
The lowest price on any diamond
CaratRank launched on July 23, 2026 with 6 votes, #3,356 of 24,623 launches that month and more than 75% of that year's launches.
What it does
We search 20+ diamond retailers to show you the cheapest listings for any specific diamond. Many times, retailers mark diamonds up by 10x vs. wholesale prices, and we're the only site that can show you where to find the best deals. We match stones by IGI, GIA, or GCAL certificate and allow you to search by style or by certificate number (which isn't a feature any retailer offers). Furthermore, we're unbiased: we don't take any referral fees from anyone.
Compare 23+ retailers selling the same certified diamond. CaratRank matches stones by IGI, GIA, or GCAL certificate and ranks sellers by price.
Pick your specs or paste a certificate number. We check 20+ websites and rank every seller, cheapest first. Sign up for unlimited searches. Enter a certificate number for one exact stone, or a shape and carat range to compare many. See every retailer carrying that certified stone, cheapest first, with the price difference spelled out. Save a search and get an email when the price drops or a new seller lists your stone. Save the stone once. CaratRank keeps watching retailer prices and tells you when it is worth taking another look. Follow a certified diamond across retailers without reopening tabs or rebuilding your search. Get a clear alert when your stone gets cheaper or a new seller…from caratrank.com
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Source: Product Hunt launch ↗
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