#1 Data Annotation Service

Data Labeling
Services for

Images

Videos

Text

Audio

Medical Data

From pilot to production, we label your data faster and more accurately than traditional providers. Expect clean, consistent annotations, quick ramp-up, and full scalability - no rework & no delays.

Hero image 1
Hero image 2
Hero image 3
Hero image 4

How It Works

Timeline Section
01

Free Pilot

Send your dataset for a free pilot

02

Pilot Review

Review the results of the pilot

03

Proposal

Get a custom data labeling plan

04

Data Labeling

Our team of experts gets to work

05

Quality Assurance

Automated and manual validation

06

Delivery

You receive the final dataset

Our Data Annotation Services

Image annotate 1
Image annotate 2

High-Quality Image Annotation Solutions

Bounding boxes

Segmentation

Polygon

Polyline

Point

Video annotate 1
Video annotate 2

Expert-Level Video Data Annotation Services

Object Tracking

Object Recognition

Action Recognition

Event Detection

Audio annotate 1
Audio annotate 2

Advanced Audio Annotation Services

Audio Classification

Speech Recognition

Emotion Recognition

Text annotate 1
Text annotate 2

Comprehensive Text Annotation Services

TextSentiment

Text Entity Detection

Text Classification

Medical annotate 1
Medical annotate 2

Pixel-perfect Medical Data Annotation Services

Radiology

Bounding box

Segmentation

Document

Estimate Your Labeling Project Cost

Find out your project cost in seconds — choose data type, complexity, and quantity to get an instant, transparent estimate

0 1M

Estimated Cost

$ 0 x 0 entities

$0.00

Run a Free Pilot

Frequently Asked Questions

Is there a minimum project size or budget?

We work with projects of all sizes -  from small proof-of-concept datasets to full production-scale annotation. There’s no strict minimum on volume, but for very small datasets, we recommend starting with a smaller scope (free pilot)  to align on quality before scaling. Pricing is tailored to your scope, complexity, and other requirements.

How quickly can you start and deliver my project?

We typically start within 48 hours of finalizing your requirements. Delivery time depends on your dataset’s scope and complexity. Most smaller projects are completed within up to 2 weeks, while large-scale projects are delivered in around a month.

Who will be labeling my data and how are they trained?

Your data will be labeled by our in-house team of trained annotation specialists. Every annotator undergoes rigorous onboarding, tool training, and project-specific instruction before starting work.

What accuracy can I expect from your annotations?

We operate with a two-layer QA process designed to consistently achieve 99%+ accuracy. This includes peer review, automated validation checks, and random sampling by senior quality specialists. If any label doesn’t meet your specifications, we rework it at no additional cost. Our goal is to deliver data that’s ready for training without further cleanup.

What security measures do you have for sensitive data?

We handle all projects under strict security protocols. All annotators sign NDAs, work within secure environments, and only access the data they are assigned. We’re GDPR-compliant and can implement additional safeguards for sensitive or regulated datasets, including encryption, anonymization, and limited-access workflows.

Didn’t find the answer you are looking for? Contact our support

Why Choose Unitlab AI

Faster Turnaround

We get your data labeled fast with AI-assisted tools + our expert team means you’re looking at days, not months.

Exceptional Accuracy

Human-in-the-loop review ensures up to 99% labeling precision tailored to your guidelines.

Cost-Effective

Save up to 5× compared to traditional labeling methods while maintaining top-tier results.

Secure & Confidential

Your data is encrypted, access-controlled, and never shared with third parties.

Wide Annotation Capabilities

From simple bounding boxes to complex segmentation, we’ve got you covered on every annotation type.

Scalable for Any Project

From small datasets to millions of labels, our platform adapts to your needs with ease.

Start Your Free Pilot

Expert annotation for images, text, audio, and medical data. 99%+ accuracy, rapid turnaround, and scalable capacity for AI/ML teams of any size.

Start in 48 Hours or Less

Guaranteed Quality

Flexible Scale

Confidential & Secure

Send Your Free Pilot Request

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.