Why Appen?

Through our years of experience improving search algorithms for clients worldwide, we’ve developed a strong and repeatable methodology for search relevance projects. And with access to an experienced crowd of over 1 million people worldwide, we can quickly scale to meet our customers’ needs.

Our data services


  • Consultative Services

    We work closely with your team to develop a customized program that addresses your unique business challenges.

  • Data Annotation

    Improve your machine learning-based products with high-quality, human-annotated training data.

  • Personalization

    Train your algorithm to deliver more personalized results for your users, driving higher satisfaction and engagement.

  • Relevant Search Evaluation

    We provide customized programs designed to improve the accuracy and relevancy of your search results.

  • Semantic Annotation

    Improve product listings and on site search with semantic annotation.

  • Translation and Localization

    Traditional translation and machine translation services from language and data experts.

Find jobs. Get help with your application. Learn about working with Appen.

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Improve your training data

Scale your machine learning with high-quality training data. Talk with one of our experts today.


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