Market landscapes / Training Data
Data Labelling & Annotation Services companies
Labelling and annotating the data models learn from, at scale and usually with people. It is the largest sub-sector in its theme at 45 companies, and 8 have been acquired.
Updated 12 October 2026
45 companies
8 acquired
28 hiring now
The rest of the Training Data landscape
The full map, including the sub-sectors too small to list separately.
The whole Training Data mapExpert Data & RL Environments for Frontier Labs 35Training Data Curation & Management 19Synthetic Data Generation 14
I am Ben Jackson. I map this market and I hire the commercial teams inside it: sales, marketing, product and delivery. If you are building a team in Data Labelling & Annotation Services, here is how I work. The whole market in numbers.