Appen provides high-quality training data
to improve machine learning at scale

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    Create artificial intelligence solutions that work by using the right data.

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  • Better data, better products

    Improve personalization and user experience for eCommerce, search, voice recognition, social and more.

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  • Training data for machine learning

    Annotation, collection, evaluation, transcription and translation of any data type or language.

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The Appen difference

Trusted by 8 out of the top 10 global technology companies


Our skilled project managers use multiple quality control methods and mechanisms to meet and exceed quality standards for training data. Quality assurance is built into both the platform and processes at Appen.


With a crowd of over 1 million skilled contractors operating in 130+ countries and 180+ languages and dialects, Appen can collect and label high volumes of image, text, speech, audio, and video data used to build and improve artificial intelligence systems.


Our platform and solutions are purpose-built to handle large-scale data collection and annotation projects, on demand. With deep expertise planning and recruiting to meet a variety of uses cases for our clients, we can quickly ramp up new projects in new markets.


Appen provides multiple secure service offerings, including secure remote workers, on-site workers, on-premise solutions, and ISO 27001 / ISO 9001 accredited secure facilities.

  • “Appen’s text-to-speech conversion has been pivotal in helping us provide more information in more ways and helping patients understand what they’re taking. “
    Anna Paonne,
    Key Account and Business Development Manager, GuildLink

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  • “The Appen team was a joy to work with. They demonstrated clear expertise in developing our training data and delivered it ahead of schedule and under budget.”
    Dr. Catriona Wallace, FlamingoAI CEO

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  • “The relationship we have with Appen makes all the difference to our success. The Appen team is a part of our team and is just as committed to quality as we are. It’s the type of dynamic you don’t find every day.”
    A leading search engine provider

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  • “Appen’s ability to prioritize and stay within the designated budget allows us to successfully deliver quality results within short deadlines. They’ve proven to be an invaluable resource.”
    Major international software provider

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  • “We had strict quality standards that needed to be implemented. This required close collaboration. The Appen team partnered with us to develop task guidelines and quality management plans. They quickly ramped the number of participants needed to meet daily and weekly data demands. Their effectiveness ensured the success of this project.”
    Global social network provider

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  • “We needed to offer consumers more personalization on our site. Partnering with Appen allowed us to collect high-quality training data for our machine learning model, which refined our algorithm much more quickly and consistently than we’ve been able to in the past.”
    Major international software provider

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Appen Training Data Solution Unveils Feature Enhancements to Accelerate Customers’ AI Initiatives

Humans and Technology Working Together Enable Better AI Results SYDNEY — Aug. 20, 2019 — Appen Limited, the leading provider of datasets used by companies and governments to train AI systems quickly and at scale, today introduced feature upd...
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Recent posts

How to Develop a Training Data Strategy for Machine Learning

How to Develop a Training Data Strategy for Machine Learning

It’s well-known that the quantity and quality of training data for any given artificial intelligence (AI) project are two of the most crucial factors for that project’s success. Insufficient or poor training data can result in an unreliable system that reaches the wrong conclusions, makes poor decisions, can’t handle real-world variation, and introduces or perpetuates bias, among other problems. It’s …

Appen Strengthens Leadership Team with Key Executive Hires to Support Continued Growth

Appen Strengthens Leadership Team with Key Executive Hires to Support Continued Growth

Sydney, NSW Australia – August 13, 2019 – Appen, a leader in the development of human-annotated training data used to build and continuously improve the world’s most innovative artificial intelligence systems, announces the hiring of two executives to its leadership team. Jon Kondo, Senior Vice President of Sales and Marketing; and Roc Tian, Senior Vice President of China, will support Appen’s …

CVPR 2019: Progress and Challenges in the Field of Computer Vision

CVPR 2019: Progress and Challenges in the Field of Computer Vision

The annual Computer Vision & Pattern Recognition conference is packed with insightful presentations and top industry experts. With nearly 10,000 attendees and 1,200 papers, CVPR 2019 in Long Beach, CA was no exception. In this post, we’ll take a brief look at some notable presentations delivered at the conference for solving numerous computer vision and pattern recognition challenges. Data augmentation …

Appen at a glance

  • Appen_130 plus countries
    Experience working in
    130+ countries
  • Appen_180 plus languages
    Expertise in 180+ languages
    Get the full list
  • Appen_20 years plus experience
    20+ years working with leading global technology companies
  • Appen curated crowd
    Access to a curated crowd
    of over 1 million
    flexible contractors worldwide
  • Appen_3 billion judgments
    More than 3 billion
    judgments made and 500,000 hours of audio processed
  • Appen_full time employees
    Over 600 employees
    located in nine offices
    around the globe

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Flexible Workers

Appen offers flexible, work from home opportunities in more than 100 countries. Learn more about current opportunities.