Lingo4G: large-scale text clustering engine

Lingo4G is a software component that identifies clearly-labelled topics among millions of documents and gigabytes of text. In near-real-time, fully automatically and without external knowledge bases.

Overview video Lingo4G large-scale clustering engine overview video


Lingo4G can help users of your applications analyze large collections of text.

  • Identification of meaningful topics. Lingo4G can give a birds-eye view of hundreds of thousands of documents by extracting the topics discussed in them.
  • Discovery of document clusters. Lingo4G can help to, for example, assign documents to domain experts for review by organizing sets of documents into non-overlapping clusters.
  • Fast access to relevant content. Topics or document clusters view will help the users to navigate directly to the documents of interest and skip the irrelevant ones.

Next steps


  • Topic discovery. Lingo4G can extract and meaningfully describe the topics discussed in a set of documents. Related topics can be organized into themes.
  • Document clustering. Lingo4G can organize the requested subset of documents in your collection into non-overlapping groups.
  • Document retrieval. Lingo4G can retrieve the specific documents matching the requested topic, theme or a document cluster.
  • No external taxonomies or knowledge bases needed, Lingo4G processes documents based only on their textual content.
  • Near-real-time processing. Once Lingo4G indexes your collection, it can extract topics, themes and document clusters within seconds.
  • Scalability. Lingo4G extracts topics in a matter of seconds regardless of whether you're processing a hundred, a hundred of thousands of documents or the whole indexed collection.
  • Automatic stop word extraction identifies domain-specific meaningless words and phrases.
  • Easy integration. Lingo4G can be called through a JSON REST API.
  • Tuning of clustering characteristics and performance in a dedicated browser application called Lingo4G Explorer.
  • Implemented in Java with no platform-specific dependencies. Lingo4G works on any platform supporting Java 1.8 or higher, including Windows, Linux and Mac.


more questions

Easy to integrate, many tuning options, very fast and lightweight.

Stephan Schmid, CEO at Comcepta, Switzerland

Our evaluation found overwhelming support for using Lingo3G.

Dr James Thomas, Associate Director, EPPI-Centre, Social Science Research Unit, Institute of Education, London

I’ve shown two board members of our client company what our FoamTree-powered app does. Amazing what a good visualization can accomplish :-)

René de Vries, Managing Director at HowardsHome