Delivery standard
99%+ inter-annotator agreement across all annotation types
What this service is designed to deliver when deployed inside your workflow.
AI Data & Knowledge Operations
Data Annotation Outsourcing for UK Companies.
Deploy trained annotation teams for image, text, and video labeling at scale. 99%+ inter-annotator agreement. Nairobi-based, UK GDPR compliant, from £7,200 per annotator per year.
9:00–18:00 UK time (GMT+3)
|EOR or Managed Services
|7–14 days from signed agreement
Overview
What is Data Annotation?
Data annotation outsourcing involves deploying trained human specialists to label images, text, audio, or video datasets for machine learning model training. Treba provides dedicated annotation teams in Nairobi who work inside your data infrastructure via VDI, delivering precision ground truth at scale. Teams are domain-matched — medical annotators have clinical backgrounds, legal annotators have paralegal training, and computer vision annotators are tested on spatial reasoning and edge-case identification.
Typical client
UK AI/ML companies, autonomous vehicle developers, computer vision startups, NLP teams at SaaS companies, and healthcare AI firms requiring labelled training data
At a glance
How Treba delivers.
The operating facts behind data annotation: delivery standard, team shape, and compliance model.
Typical team size
5–50 annotators per project, scaled to dataset volume
Scaled to project load and pipeline.
Compliance model
UK GDPR aligned — IDTA framework
Legal and data-transfer structure for the engagement.
UK loaded cost
£40,864/yr
Data Annotator
The challenge
Why UK companies struggle with data annotation.
Model quality is directly tied to label quality, but annotation is the most labour-intensive stage of any ML pipeline. UK-based annotators cost £25,000–£30,000 per year and still require supervision. Crowdsourced platforms deliver volume but not consistency — inter-annotator agreement on complex tasks often drops below 80%. Meanwhile, your ML engineers are spending 30%+ of their time reviewing bad labels instead of improving model architecture. The bottleneck is not compute — it is labelled data.
Outcomes
What you'll achieve.
See the shift from UK in-house benchmarks to Treba delivery outcomes.
Outcome
Inter-Annotator Agreement
UK in-house
< 80% (crowdsourced)
With Treba
99%+ (dedicated team)
Outcome
Cost Per Annotator
UK in-house
£40,864/yr loaded
With Treba
£7,200/yr loaded
Outcome
ML Engineer Time on QA
UK in-house
30%+ reviewing labels
With Treba
< 5% (Treba QA layer)
Capabilities
What we deliver.
Image & Video Annotation
“Bounding boxes, polygons, and semantic segmentation at volume.”
Text & NLP Labeling
“Named entity recognition, sentiment, and intent classification.”
RLHF & Preference Ranking
“Human feedback loops for generative AI alignment.”
Meet Your Next Hire
“I manage a team of 12 annotators labeling medical imaging data for a UK diagnostics company. We maintain 99.3% agreement across 40,000 annotations per month. The calibration process at the start of each project is what makes the difference — we do not scale until accuracy is locked.”
GM
Grace M.
Lead Data Annotator
Education
BSc Computer Science, Kenyatta University
Certification
Labelbox Certified Workforce Partner, Python for Data Science (Coursera)
Experience
3–7 years in data annotation roles
Economics
UK loaded cost vs Treba.
Fully loaded comparison — Treba cost includes salary, Nairobi office, equipment, IT infrastructure, and full compliance. No hidden fees.
Save 78%
Remote from Nairobi
Audio Transcriptionist
Pre-vetted · Interview in 48hrs · Start in 7 days
UK Cost
£38,592
Treba Cost
£8,400/yr
You Save
£30,192/yr
How it works
How we deliver data annotation.
01
Discovery Call
Scope, volume, tools, compliance requirements. 1–2 days.
02
Talent Selection
Pre-vetted candidates matched to your brief. 3–5 days.
03
Tech & Compliance Setup
VDI/VPN access, NDA execution, DPA signing. 2–3 days.
04
Nest Training
2-week onboarding inside your systems with QA checkpoints.
05
Go Live
Full production. Weekly check-ins for first 30 days.
Engagement models
Two ways to work
with Treba.
Choose the model that fits your team. Switch anytime.
EOR (Employer of Record)
Managed Services
£17kAvg. annual
saving
saving
Your Treba team
James M.
KYC Analyst
Amina K.
Med. Transcriber
David O.
QA Tester
Total / yr£28,400
Compliance built in. Not bolted on.
UK GDPR + IDTA
International Data Transfer Agreement for lawful UK–Kenya data flows. Executed by legal counsel. Annual review.
Kenya DPA 2019
Modelled on EU GDPR. Regulated by ODPC. Enforceable. Equivalent protection.
ISO 27001-Aligned
Biometric access. Clean desk policy. CCTV. Network segmentation. No shortcuts.
Cyber Essentials
UK government-backed baseline cybersecurity certification. Audited annually. Public record.
Industries
Industries using this service.
Data Annotation outsourcing for regulated UK industries.
Related services
Explore more.
Browse all AI Data & Knowledge Operations services
View the full list of services in this pillar
FAQ
Frequently asked questions.
Keep reading
Before you outsource data annotation, read this.
Guides on hiring, delivery models, pricing, and compliance for UK teams evaluating Data Annotation.
ArticleOutsourcing
How to Vet an Outsourcing Provider: A Due Diligence Checklist for UK Buyers
Due diligence framework for UK buyers evaluating outsourcing providers. Security, financial stability, compliance checks—avoid partnership failures.
ArticleStrategy
The UK Skills Shortage and the Case for Offshore Talent Partnerships
Explore why UK businesses turn to offshore talent partnerships to address skills gaps. Strategic insights on hiring abroad.
ArticleOutsourcing
Trust & Safety Moderation: Building an Outsourced Review Team
Scale content moderation with Kenya-based review teams. Cover UGC, fraud, abuse detection. Accuracy metrics, moderator wellbeing, and cost savings.
WE ARE TREBA
Start your data annotation pilot today.
Save £33,664 per year with a dedicated data annotation team in Nairobi. Pre-vetted professionals ready in 7–14 days. UK GDPR compliant.