Pricing
Free to study. Paid to sell.
Everything a student or a buyer touches is free and always will be: the reference, the verifier, the disclosures on every lot. Dealers and serious collectors pay for the tools that earn their keep — and Stratum takes nothing on in-person sales, trades or payment links through your own processor.
Free
$0
Study, the verifier, signed certificates, browsing the Exchange, trades, and a read-only web view of your collection. Free for students and educators, and for any collector under the record cap.
- Up to 250 records
- Exchange seller fee 6 % all-in, capped at $300 per lot
- Trades, in-person sales and your own payment links: 0 %
- No buyer fee
Collector+
$49 / year
Unlimited records, the desk with edits back to the iPad, insurance and estate packages, Study pack updates early, and selling on the Exchange at 4 %.
- Unlimited records
- Exchange seller fee 4 % all-in, capped at $300 per lot
- Trades, in-person sales and your own payment links: 0 %
- No buyer fee
Dealer
$490 / year
Everything in Collector+, plus your store page and handle on stratum.black, staff logins, the Z-report archive, Shopify, eBay and Etsy adapters, and certificates issued from the web. Exchange fee 3 %.
- Unlimited records
- Exchange seller fee 3 % all-in, capped at $300 per lot
- Trades, in-person sales and your own payment links: 0 %
- No buyer fee
The fine print, in plain words
The seller fee includes card processing; there is nothing else. A $12,000 mosasaur jaw sold on the Exchange costs $300, not $720, because the cap is the cap. In person, at a show, over the phone — Stratum charges nothing and Apple charges nothing on Tap to Pay or pay-by-link. Subscriptions are billed by Stripe; cancel any time and the plan runs to the end of the period. The same plans will be available in the iPad app through Apple when the app ships on the App Store.
Students and educators: the Free plan is the plan. Nothing public is behind a paywall — if you ever meet one, that is a bug.