What is included
This register covers providers with public offerings relevant to AI training data, expert work, annotation, evaluation, simulated environments, or supporting infrastructure. The scope follows a 170-provider reference inventory and adds relevant business-data suppliers. Entries without adequate current evidence are withheld. See the coverage review for the exact mapping and exclusions; this is not a complete census of the market.
Evidence and review dates
Each profile links to a primary provider source reviewed on 20 October 2026. Descriptions summarize public marketing or product information, including company-authored directory profiles where appropriate. Some small providers offer limited public detail; their descriptions are correspondingly narrow. Sources may include indexed official-page content when a live page is unavailable. The review date means the source was inspected; it does not mean that the company, legal rights, delivery quality, or security controls were audited.
How categories work
Offering, domain, and data-approach labels are editorial interpretations of the reviewed description. They help narrow research, not certify capability. “Mixed / task-dependent” indicates a project-dependent approach. “Not confirmed” marks an unknown rather than a negative finding.
How ordering works
The directory starts in alphabetical order. Filters use OR within one group and AND across groups. Comparison selection does not change a provider’s ranking. No scores, star ratings, funding totals, or customer endorsements are invented or inferred.
Limitations and corrections
Contact [email protected] for questions or corrections. Listings and source links are informational, not endorsements. This site does not promise a purchase, referral, consultation or legal advice.
What this site does not establish
Inclusion does not confirm rights clearance, regulatory compliance, supplier quality, independence, affiliation, or an active commercial relationship. No listing is a guarantee that a provider will buy your data or accept your project.