Kantei Technologies
AI and big data systems for the collectibles world — infrastructure that reads the whole market and returns fair, defensible valuations. Our focus right now: Pokémon and graded trading cards.
About
Kantei (鑑定) is the Japanese word for judgment, appraisal, and expert opinion — the act of looking closely and rendering a confident verdict. That's the work we automate: AI that weighs the collectibles market and returns fair valuation estimates at a scale no team could by hand, with a current focus on Pokémon and graded trading cards.
We turn noisy, fragmented real-world data into structured systems you can trust — ingesting, resolving, and modeling information at scale.
Matching, retrieval, pricing, and learned valuation — models designed to produce answers people can confidently act on.
From card recognition to valuation, we train our own models on datasets we curate, label, and refine from real market activity.
Products
One brand, two surfaces. CardIndex brings the whole trading-card market into focus — on the web and on mobile.
cardindex.co
The intelligence layer for trading cards. CardIndex ingests millions of listings and sales across the market, resolves each one to the exact card and grade, and turns that firehose into clean pricing, history, and signal — so collectors and investors finally see the whole market at a glance.
Visit cardindex.co →
iPhone & iPad
The whole market, on the go. Our on-device AI identifies cards faster than any other app — then layers on live prices, sales history, and the market intelligence to value, track, and watch your collection anywhere.
Coming to the App Store soon
Recognition is powered by our own computer-vision pipeline — built, trained, and tuned in-house, running entirely on your phone.
A CoreML vision model runs straight on the camera frame — instant matches, no server round-trip, no connection required.
Tens of thousands of cards are embedded into an index we generate; a single photo resolves to the exact card by visual similarity.
Trained on our own dataset to recognize PSA, CGC, BGS, SGC & TAG labels — grade, type, and cert number.
Contact
Partnerships, ideas, or just curious what we're up to — the door's open.
info@kantei.io