One job per product
Each ProtoCat product has a narrow workflow. CompCheck researches asking-price comps. It does not pretend to be an inventory system.
Parent company
Software for careful resale research.
ProtoCat is the company behind CompCheck. We build focused tools for people who price what they sell, and we keep each product on its own address.
Official data only
CompCheck queries supported marketplaces through official APIs. It does not scrape blocked marketplaces or invent sold prices.
Claims match the software
The parent site describes what CompCheck ships today: current asking prices, a transparent listing band, and an early commercial rollout.
What is shipping
CompCheck is in early commercial rollout and under active development. Later ProtoCat products will be listed here when they have a name and a homepage.