Four kinds of company sell training data to the labs. Three of them make or label new material. Only the fourth licenses the records an operating business already holds, and only that one pays you for them.
Labor marketplaces
They recruit specialists, match them to a lab's brief, and pay them by the hour to write material that did not exist before. They want your people's time, not your records.
Annotation vendors
They label, rank and correct material a lab already holds. That is preparation, not supply. They are not buying anything from you.
Synthetic data providers
They generate material with models. It is cheap at volume and carries no real operating history, which is exactly what your records have.
Record intermediaries
Firms that license the working record of real companies to the labs: mail, tickets, CRM history, drawings, the shared drive. Some buy as principal at their own price. Some act for the seller and put one asset in front of one buyer at a time. Artemis is the second kind. No fee to the seller at any stage.
What every serious buyer checks
That you own what you license, 17 U.S.C. 202 being the usual trap. That the record is unpublished, since anything on the open web was trained on years ago. That the refused categories are out: substance use treatment records, medical records, privileged files. A supplier that skips these cannot place the material, whatever it offers you.