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Data annotation

Data annotation services for machine learning

  • High accuracy pre-made datasets available instantly
  • A diverse pool of qualified data annotators and speakers for custom requests
  • Fast turnaround available in 50 languages
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Data annotation
Loved by over a million customers

4.2 on Trustpilot

4.6 on Google

What we do
Order ethically sourced training data in pre-made packages, or work closely with us to enable our language experts to create a custom dataset for you

How it works

In order to optimize your own speech recognition models, you need data. Amberscript can help you with pre-made sets of 99% accuracy language samples from native speakers.

Bulgarian, Catalan, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Lithuanian, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Turkish and Swedish.

Customer calls – Banking – Insurances – Airlines – Manufacturing – Media – Automotive – Energy – Manufacturing – Telecom

Text and speech recollection

For tailored data of which you can determine desired domain/intent, demographic distribution, and recording device type, Amberscript has a large pool of transcribers in more than 11 languages.

On our data recollection platform, we can transcribe snippets or simulate a variety of audio settings in order to generate the perfect audio dataset for your training requirements.

We always work with native speakers and source speakers who match your demands, available in over 50 languages and more than 75 dialects.


Quick turnaround for all your files


Enabling an accurate flow of audio-to-data


GDPR compliant security and safety

Enable an accurate audio-to-data flow. Using Amberscripts language experts you can create any data you need for machine learning. 
The possibilities are endless.

Interested in 
data annotation services?

We make audio accessible


Speech collection

Our native speakers will record spontaneous or scripted speech and build a database of audio monologues or dialogues in the frequency you wish.

Lexicon Development

Our language experts will transcribe audio snippets to text to help your models understand the nuances of speech.


Our language experts determine emotion, categorize the topic, or identify an important event in a snippet of audio.

Text Named Entity recognition

Our language experts will label people, places, organizations and events in texts.

Text classifications

Sentiments in a text are classified and not easily readable texts are transcribed.


Our pool of transcribes, subtitlers, and annotators are flexible to work in a variety of ways.

Are you interested in

Data annotation services?

Get a project manager assigned dedicated to your success and start working immediately to receive your data fast and at scale

Contact us
  • Can you also deliver transcriptions for other media formats?

    We deliver data annotation for speech-to-text solutions. However, if you have a special request, please contact our sales team here.

  • How do you ensure high quality?

    We work with a vast network of professional annotators, who will be trained to your annotation guidelines. All annotations go through rigorous quality checks using our sophisticated data annotation AI.

  • How do you ensure the confidentiality of personal data?

    Amberscript’s IT infrastructure is built on the server infrastructure of Amazon Web Services located in Frankfurt, Germany. All data that is processed by Amberscript will be stored and processed on highly secured servers with regular back-ups on the same infrastructure.

  • How does data annotation work?

    Data Annotation is the process of labeling data, which could be in various forms such as images, video, audio or text. Basically data annotation is done using various tools like bounding, semantic segmentation etc. Data labeling is usually done to train various computer models.

  • How do you ensure timely delivery of results?

    Should you wish to make use of our data annotation services, we will assign a project planner to your project, who will be in close contact to discuss the details and timeline.

  • Which kind of specifications do you use for data annotation?

    Depending on your needs, we can provide different acoustic models or different linguistic models. To find out more about this, please contact our sales team here.

Meet our

Happy customers

HVA (Amsterdam University of Applied Sciences) – Read case study.

Our research group conducts a lot of interviews. Previously, we worked with our own pool of transcribers.
I’m glad that now our interviews are all transcribed in one place, it saves a lot of time in arranging everything.

L. Van den Berg – Lecturer-researcher at the Hogeschool van Amsterdam