A text annotation tool to train AI

Turn text into intelligence. Easy.



Get relevant insights from text automatically

Discover patterns, identify problems, realize solutions.

Some examples:

  • > Use industry specific terms to analyze user feedback and design specific actions for improvement.
  • > Enrich your text with metadata and make it searchable.
  • > Recognize intents relevant to your field.
  • > Identify bid opportunities.

Train your own AI

Generate training data for your own AI

tagtog is as its core a NLP text annotation tool. You can create labeled corpora in three possible ways:

  • > Have your team to annotate text manually. Do you have pre-annotated data? Import it and let the team correct it.
  • > Let our team at tagtog of human annotators label the data for you.
  • > Use machine-learning models to work at scale and semi-supervised.

See some of the public corpora created by other users.


  1. Import text

    Point to the text you want to import (web pages, known document repositories -e.g. PubMed-, etc.) or upload your own text (PDFs, XML, HTML, plain text, etc.).

  2. Customize to resolve your unique problem by annotating

    Choose already trained machines to annotate text automatically (e.g. recognize gene-disease relations, vehicle parts, etc.) or customize tagtog to your unique context. Use our text annotation tool to give feedback on the results and thus, improve the accuracy of the AI to resolve your problem.

  3. Get results right away

    Raw numbers are good. Visualizations are better. Understand the results at a glance and export them in various formats. Use our search engine to discover actionable insights and make smarter decisions. That’s it!


  • Machine Learning with people on the loop

    Using our annotation tool, you provide feedback (accept, edit, reject the predicted results). This is used to improve the accuracy of your machines and adapt them to find only what you need. More information.

  • No Coding or Data Engineering skills required

    Democratize Text Analytics. You don’t need to code or juggle with data to use tagtog. Use the intuitive web interface to just annotate and customize the system to get suitable results right away.

  • Text Annotation Tool

    The best text annotation tool. Intuitively enrich text: categorize documents and annotate entities (e.g. company products, intents, etc. ) or relations (e.g. diseases caused by mutations). Entity disambiguation, document categorization, entity labeling. Use this knowledge to teach machines recognize similar patterns. More information.

    Do you want to train your own algorithms? Import your predictions, correct them in the annotation tool, and feed them back.

  • Marketplace for Intelligent machines

    Use already-trained machines to analyze your text. Want to identify genetic mutations? vehicle parts? tweets supporting a specific political trend? We got you.

    Is your machine not there yet? Don't wait, create it and train it yourself. You can also offer your newly-created awesome machine at the disposal of other users.

  • Concept Search

    Find and discover through collections of text by concept and not by keywords (e.g. find all vehicle technical reports that are related to engine failures). More information.

Quick training

Use already-trained machines, no new training required. Additionally, upload already-annotated documents or term dictionaries to reduce dramatically the time required for subsequent trainings.

On our secure Cloud or On-premises

On the Cloud nothing to install, no servers to worry about, start right now. On-premises, we have a Docker image ready to run in your own infrastructure. In both cases, just use your favorite browser. More information.


Integrate tagtog within your existing pipeline. Use the API to upload text, we retrieve the results. You can also use it to search across your text collection or improve your search engine. More information.

Team Collaboration

Invite other users to help you annotate text and create an annotated corpus. Collaborate. You can split tasks, create guidelines and review annotations. Use these to accelerate machine training. More information.

Entity Normalization

Manage disambiguation. tagtog determines the identity of the annotations assigning unique ids from standard databases such as UniProt or Wikipedia.

You can also upload your own dictionaries to map the annotations to your unique internal references (e.g. product ref). More information.

Big Text

Work with external text sources (e.g. PubMed) or your own text. We can process millions of documents with ease as everything is handled on the cloud.


Discover relevant insights in text automatically.

Quickly customize tagtog to meet your needs. No coding or data engineering skills required.

Save time/costs and enable people by removing repetitive work



Download our  Product brief