Meet the product
Heartex is annotations management system. Configurable in 10 minutes, producing format that you can plugin into your machine library of choice. It uses all the latest tech to speed-up the labeling process.

Solutions for multiple industries

One powerful solution
for all your annotation needs

Configurable UI

Based on XML like config you can create your own interface in about 10-15 lines. Heartex supports a wide variety of annotation schemes for text, audio and images.

  • Text classification
  • Named entity recognition
  • Dialogs analysis
  • Bounding boxes for images
  • Polygons for images
  • Audio regions

Data Manager

You spend a lot of time crafting your dataset. We get you the powerful tool to better explore your items. Find outliers and biases, edit and update previous results.

  • Explore annotations
  • Check out predictions
  • Find outliers

Machine Learning

You get pre-trained models that are used to optimize the labeling process. We support different model types, each one particularly connected to labeling task.

  • Pre-annotations
  • Active Learning
  • Cluster Annotation
  • SDK to connect your model

Teams and Collaborators

Invited collaborators get minimal UI. You can set instructions and monitor and analyze the agreement between collaborators.

  • Invite collaborators
  • Monitor the progress
  • Manage quality


Compelling statistics to help you better understand your datasets and adjust the labeling process

  • Annotations distributions
  • Model performance
  • Collaborators agreement

An All-in-one solution – packed with powerful features.

Unlimited Projects

We have support for unlimited projects on any plan. You can run as much in parallel as you want.

Download annotations

JSON file with all the labels information. Including model predictions.

HotKeys Support

HotKeys helps to the labeling quicker. Our interface is tuned for maximum performance.

Models Integration

Connect your own models to use for pre-labeling and verify it's predictions


Don't spend extra time on configuring the project, use one of multiple template that we offer.


Easily integrate Heartex into your pipeline using our API.

Start annotating your data
You're building something great, let us help you do it faster and remove the boring parts