Image Annotation
Bounding boxes, polygons, semantic segmentation, and keypoint labeling for computer vision models. 99%+ accuracy guaranteed.
Data Annotation & Preparation for AI
Scale Your AI with Accurate Data Annotation
Outsource your data labeling to experts. We annotate a free test batch first, then provide accurate pricing based on real work with your data—not estimates. Focus on AI development while we handle your training datasets.
Trusted by Leading AI Companies
Teams worldwide rely on our data labeling expertise.
Data Annotation Services
Professional labeling solutions for computer vision, NLP, and audio ML projects.
Text Annotation
Named entity recognition, sentiment labeling, and text classification for NLP and language models.
Video Annotation
Frame-by-frame tracking, event detection, and action recognition labeling for video AI applications.
Audio Annotation
Speech transcription, sound classification, and speaker identification for voice AI and audio recognition.
How We Work
From free test batch to full-scale delivery
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Discovery Call
We discuss your project, analyze your data, and define annotation requirements together.
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Free Test Batch
We annotate a sample of your data for free. You see our quality, we calculate exact time and cost—no guesswork.
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Full-Scale Annotation
Our trained team labels your data following strict protocols and delivery schedules.
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Quality Assurance
Multi-layer QA checks ensure 99%+ accuracy. Automated validation plus expert review.
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Secure Delivery
Receive clean datasets in your format. Track progress with real-time dashboards.
What Our Clients Say
Trusted by AI teams worldwide
"We love working with the WeLabelData team! They provide some of the best data annotation services in the industry, and their customer success team is responsive to all our needs. The quick turnaround time and accuracy helps us be more efficient!"
"Absolutely great to work with! Fast, efficient, with great attention to detail! The WeLabelData team did a perfect job annotating our dataset. And their expert advice really helped us organize our internal labeling process. Wouldn't hesitate to work with them again."
"I recommend WeLabelData for their reliable and professional service. Their team effectively delivered the service we needed with a practical approach."
Education Program
Data Annotation Training in Ukraine
Free online training in data annotation for vulnerable groups in Ukraine. In partnership with Baobab and supported by a United Nations feasibility study, this program provides practical image annotation skills that can lead to future work opportunities.
Frequently Asked Questions
Everything you need to know about our service
How much does data annotation cost?
Our data annotation services cost $5 per hour of work. This flat hourly rate applies whether we're building your annotation process from scratch or integrating into your existing workflow.
How do you calculate the total project cost?
We provide accurate pricing through our free test batch process:
- You share your requirements and data sample
- We annotate a test batch for free (building guidelines if needed)
- We measure the exact time required
- We identify corner cases and refine the process
- We return with precise cost estimate based on real work—not guesses
This approach ensures you get accurate pricing at $5/hour, with full transparency about timeline and budget before committing to the full project.
How long does data annotation take?
Timeline depends on your project's scale and complexity. After completing your free test batch, we provide an accurate delivery schedule based on measured performance with your specific data.
Factors affecting timeline include dataset size, annotation complexity, number of classes/labels, and quality requirements. Our test batch process reveals the true scope before we commit to deadlines.
What is a free test batch?
A free test batch is our way of understanding your project before providing estimates. We annotate a sample of your actual data at no cost, which allows us to:
- Build or refine annotation guidelines specific to your domain
- Identify edge cases and challenges
- Measure real annotation time (not estimates)
- Demonstrate our quality standards
- Give you accurate project timeline and cost
You get to see our work quality, and we get the insights needed to provide honest, precise pricing. No guesswork, no surprises.
Our Social Mission
Quality data annotation with meaningful impact
WeLabelData partners with Epiprosvita to create remote job opportunities for mothers of children with disabilities in Ukraine. Every project you run with us supports women balancing caregiving with meaningful work.
Technology meets social impact: Get world-class annotation services while empowering Ukrainian families to achieve financial stability.
Start with a Free Test Batch
We'll annotate your data sample at no cost. After the test, you get accurate pricing based on real work—not estimates. No commitment required.