What is Text Classification?

Text classification, sometimes called text categorization or document classification, is the process of analyzing a body of text, understanding the subject of the text while recognizing the intent and sentiment within it. Using that information, the text is then classified under a predetermined set of categories.

At Lionbridge, we use our crowd of expert annotators to analyze your documents or text and flag key features within them. Those key features are then used to tag your content and sort them into the categories you require. Text classification models are used in a variety of AI solutions including chatbots, search engines, virtual assistants, spam detectors, and more. In order to train the models for these text classification solutions, human-annotated training data is required. Using our high-quality AI training data, you can have confidence knowing your algorithms are being provided with a solid ground truth.

Why use Lionbridge for Text Classification?


Whether you’re looking for annotated text data to train your model, a platform to annotate your data, or a team of qualified workers to categorize your content for you, Lionbridge is your home for text classification outsourcing.

  • 500,000+ Contributors
  • 300+ Languages
  • 20+ Years of experience


Our established quality assurance system features built-in validation, spot-checking, regular performance evaluations, and a worker seniority system to ensure the highest quality of data production.

Multilingual Experts

With a specialization in linguistics, Lionbridge is a leading text classification company. Our curated crowd can accurately label and categorize your content in the language of your choice from one of our 300 supported languages.

Customizable Workflows

Need things done in a specific way under strict guidelines? We can work with you to make sure our team of experts gets your project done how you want it and within your timeline.


Our Related Services

Content Moderation

Moderation plays an important role in protecting customers while driving higher user engagement and satisfaction. Whether you need moderation for social media, news comments, consumer reviews, or everything in between, Lionbridge is your home for content moderation outsourcing. Our team will evaluate and classify your content based on your guidelines.

Product Categorization

Customers should be able to find their desired products easily and intuitively. Use our experts to organize your products into the correct categories and departments or have us evaluate your algorithm to provide the ground truth for your categorization model.

Search Engine Validation

Search relevance elevates a search engine from just a simple tool to the element of your site that provides the customer with the best possible user experience. Use our experts to evaluate your search engine results and train your search engine to be faster, more intuitive, and less error-prone.

Content and Document Classification

Annotate your data with a customizable set of tags and provide your algorithm with a solid ground truth.

Language Identification

Use our multilingual crowd to identify and label the language of your data.

How does Text Classification with Lionbridge work?

how to crowdsource data

1. Project set-up

Our team will work with you to develop a custom solution based on your project objectives and timeline.

how to crowdsource data
how to crowdsource data

2. Production

Our crowd of multilingual experts get to work creating, annotating or validating your data.

how to crowdsource data
how to crowdsource data

3. Delivery

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

how to crowdsource data

Success Stories


Text Classification Pricing

The Lionbridge platform streamlines much of the text categorization process, allowing us to offer the most cost-effective solutions 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 Text Classification Services

Lionbridge provides professional text classification services in over 300 languages. Some of our most popular languages include:

  • Chinese text classification
  • Dutch text classification
  • French text classification
  • German text classification
  • Italian text classification
  • Japanese text classification
  • Portuguese text classification
  • Spanish text classification

Why is Text Classification important?

A chatbot is any program that mimics real conversations. This can either be embedded in a site or through a third party messaging platform like Facebook Messenger or Slack.
In this case study, learn how we helped a leader in natural language text technology scale their software implementation framework into 17 additional languages. We delivered in multiple languages and in the context of 25 projects.
In an open conversation with Carl Hoffman (CEO of Basis Technology) and Charly Walther (VP of Product & Growth at Lionbridge AI), we gain insight into the global text analytics supply chain, how NLP differs from other fields of machine learning, and the challenges of maintaining multilingual data quality.