What is Data Labeling?

Data labeling refers to the process of annotating data for use in machine learning. There are hundreds of ways to label your data, all of which help your model to make one type of specialized prediction. For example, labels can indicate whether an image contains a dog or cat, the language of an audio recording, or the sentiment of a single tweet. The accuracy of your labels will determine how well your model can perform its intended task. This makes data labeling a crucial task for any machine learning project - and a way to make your model stand out from the competition.

Our network of qualified data labelers create highly accurate labeled training datasets for machine learning. With over 20 years of hands-on experience, we’ve learned how to optimize the labeling process and built a range of technology to maximize data quality. No matter what your needs are, Lionbridge can support your data labeling needs across all content types.

Lionbridge’s Data Labeling Tool

Lionbridge’s state-of-the-art labeling platform makes it easy to collect data samples from thousands of contributors.

How does it work?

how to crowdsource data

1. Project set-up

Our team works with you to develop a custom solution based on your project’s requirements, goals, and timeline.


how to crowdsource data
how to crowdsource data

2. Production

Our crowd of multilingual experts get to work labeling your data according to your specifications.

how to crowdsource data
how to crowdsource data

3. Delivery

Our project management team checks, packages and formats the data before sending it to you for final approval.

how to crowdsource data

Our Data Labeling Services

Order data labeling services in a variety of forms.

Text Labeling

At Lionbridge, we’ve spent two decades building out our text data capabilities. Whether you’re training a chatbot or an OCR system, our curated crowd can accurately label text data in over 300 languages.

Image Labeling

Lionbridge provides a wide array of image data collection, annotation, and validation services for various machine learning applications. Our network of over 500,000 qualified contributors can label hundreds of thousands of images for input into computer vision models.

Audio Labeling

Lionbridge enables machine learning teams to quickly create audio datasets across 300+ languages and dialects. Our network of qualified linguists, in-country native speakers and experienced project managers have extensive experience of collecting and labeling audio data for machine learning.

Video Labeling

Lionbridge provides video collection, classification, and annotation services. Whether you’re looking for a platform to label video data or custom-made video datasets, we have the experience and technology necessary to serve all of your needs.

Geo Labeling

Lionbridge is a global leader in the development of human-annotated geo-local data. Our network of 500,000 in-market evaluators can check driving and walking directions, find local business information, verify addresses and more.

Why Lionbridge?


With 20 years of experience in providing data labeling services, Lionbridge can quickly assign qualified workers to build custom-labeled training datasets.


Our quality assurance system features built-in validation, spot-checking, regular performance evaluations, and a worker seniority system to ensure quality output.


Our network of over 500,000 qualified annotators allows us to quickly process hundreds of thousands of data rows so your models can get the information they need to work in the real world.

1 million+ Contributors
300+ Languages
20+ Years of Experience

Case Studies

Sentiment Analysis

Learn how Lionbridge helped one of the world’s biggest technology companies collect and annotate 20,000+ text records to train their text analysis engine.

  • 20,000+ Text Records
  • 14 Languages
  • 1,000+ Hours of Work Completed



Data Labeling Pricing

How much do Data Labeling services cost? The Lionbridge platform streamlines much of the data labeling process, allowing us to offer the most cost-effective solution in the industry. Contact us to get a free estimate for your project.

  • Account Manager
  • Project Management
  • 24/7 Support
  • API
  • NDA
  • Volume pricing
  • Custom reporting
  • Enterprise-grade SLAs
  • Custom invoicing
  • Consulting services
Get in touch with our team today

Multilingual Data Labeling Services

Lionbridge provides data labeling services across 300+ languages and dialects. Some of our most popular languages include:

  • Chinese data labeling
  • Dutch data labeling
  • French data labeling
  • German data labeling
  • Italian data labeling
  • Japanese labeling
  • Portuguese labeling
  • Spanish labeling

Explore our annotation services

Text classification is used in a variety of AI solutions including chatbots, search engines, virtual assistants, spam detectors, and more.
Utilize our multilingual expert crowd for accurate audio classification quickly and at scale.
Power your computer vision models with high-quality image data, meticulously tagged by our expert annotators.