Market landscapes / Training Data / Data Labelling & Annotation Services
Appen
Human-annotated training data for AI models. Appen collects, labels and evaluates data across text, speech, vision and robotics to train frontier AI systems, working with custom datasets and research services across 500+ global locales.
Data Labelling & Annotation Servicesalso: Expert Data & RL Environments for Frontier Labsappen.com ↗
Updated 9 November 2026
Hiring now
From Appen's own jobs board, checked every week.
Hiring across several countries. Roles are advertised in the US, India, the UK and Brazil.
With a sourcer on the list, it is preparing to hire at a faster pace.
It has 23 open roles, up from 5 in mid-July.
Where the roles are
Against its sector
22 of the 42 active companies in Data Labelling & Annotation Services are advertising roles. Welo Data has the most, with 183.
Who Appen 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 Appen'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 Appen, want to work at one, or think Appen is filed in the wrong place, put 20 minutes in my diary.
Book 20 minutes with Ben →