Market landscapes / Training Data / Data Labelling & Annotation Services
Welo Data
Enterprise AI training data and model evaluation at scale. Welo Data provides multilingual datasets, human annotation, quality assurance and red teaming services for frontier AI programs across industries.
Data Labelling & Annotation Servicesalso: Expert Data & RL Environments for Frontier Labs501-1,000 peoplewelodata.ai ↗
Updated 9 November 2026
Hiring now
From Welo Data's own jobs board, checked every week.
Hiring across several countries. Roles are advertised in Brazil, Germany and DACH, France, India, Israel, the UK, Australia, Singapore, the US, Japan and Europe.
Where the roles are
Against its sector
Welo Data has more open roles than any other company in Data Labelling & Annotation Services. 22 of the 42 active companies in this sub-sector are advertising roles.
Who Welo Data competes with
The other active companies we file under Data Labelling & Annotation Services, sorted by how much they are hiring.
Where this fits
Labelling and annotating the data models learn from, at scale and usually with people. It is the largest sub-sector in its theme at
We track hiring and team changes across all 174 companies in Training Data.
Our talent report for this sector shows how Welo Data's team compares with its competitors.
What is in it:
- Every company's team size, side by side, grouped by sub-sector
- Who grew their team over the last year, and by how much
- Who is losing people: attrition for each company, against the sector average
- Who is hiring right now, and how many open roles each has
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 at a company like Welo Data, want to work at one, or think Welo Data is filed in the wrong place, put 20 minutes in my diary.
Book 20 minutes with Ben →