NReco Recommender (.NET port of Apache Mahout CF engine) is a recommendation system library that takes users' behaviour (usage statistics, preferences, ratings) and from that tries to find items that other users might like. Collaborative filtering algorithms are especially effective for recommending products, music, books, videos etc.

Code Quality Rank: L3
Programming language: C#
License: GNU General Public License v3.0 or later


NReco Recommender

NReco Recommender is a .NET port of Apache Mahout Collaborative Filtering engine "Taste" (standalone, non-Hadoop version). Names of namespaces, class names and public methods are preserved but aligned with C# naming conventions.

NuGet Release AppVeyor


Official website: NReco Recommender MovieLens ASP.NET MVC Example API Reference

Copyright and License

Copyright 2013-2017 Vitalii Fedorchenko (nrecosite.com) Parts of this code are based on Apache Mahout ("Taste") that was licensed under the Apache 2.0 License (see http://www.apache.org/licenses/LICENSE-2.0).

Free and public version of NReco Recommender is licensed under [AGPL][agpl].

Buying a license is mandatory as soon as you develop commercial activities distributing the NReco Recommender inside your product or deploying it on a network without disclosing the source code of your own applications under the AGPL license. These activities include:

  • offering paid services to customers as an ASP
  • making recommendations in the cloud or in a web application
  • shipping NReco Recommender with a closed source product

*Note that all licence references and agreements mentioned in the NReco Recommender README section above are relevant to that project's source code only.