# DataTrain.AI

> A neutral, open directory of the AI data supply chain: 3,216 datasets, 554 data companies, and 335 tools that supply, label, generate, process, license, govern, and evaluate machine-learning training data — with a focus on multimodal and physical-AI data (text, image, video, audio, speech, 3D, geospatial, sensor, robotics, medical, cross-modal).

datatrain.ai is a non-transacting, editorially neutral catalog. Every listing is a stable, canonical URL that emits schema.org structured data (Dataset, Organization, SoftwareApplication). You are welcome to read, index, and cite datatrain.ai listings; please attribute the listing URL.

## Datasets

- [All datasets](https://www.datatrain.ai/datasets/): 3,216 Multimodal training datasets with structured metadata (modality, task, license, size, format, language) and schema.org Dataset markup for Google Dataset Search.
- [Multimodal](https://www.datatrain.ai/modality/multimodal/): 2368 listings.
- [Text](https://www.datatrain.ai/modality/text/): 2175 listings.
- [Image](https://www.datatrain.ai/modality/image/): 1418 listings.
- [Tabular](https://www.datatrain.ai/modality/tabular/): 1117 listings.
- [Video](https://www.datatrain.ai/modality/video/): 706 listings.
- [Audio](https://www.datatrain.ai/modality/audio/): 514 listings.
- [Sensor / Time-series](https://www.datatrain.ai/modality/sensor-time-series/): 465 listings.
- [3D / Point Cloud](https://www.datatrain.ai/modality/3d-point-cloud/): 338 listings.

## Companies

- [All companies](https://www.datatrain.ai/companies/): 554 Organizations across the data supply chain — collection, labeling, curation, synthetic generation, licensing, governance, and evaluation.
- [Proprietary Data Providers](https://www.datatrain.ai/segment/vertical-proprietary-data/): 170 listings.
- [Labeling & Annotation](https://www.datatrain.ai/segment/labeling-annotation/): 78 listings.
- [Data Marketplace](https://www.datatrain.ai/segment/data-marketplace/): 68 listings.
- [Data Processing & Curation](https://www.datatrain.ai/segment/data-processing-curation/): 61 listings.
- [Web / Real-time Data](https://www.datatrain.ai/segment/web-real-time-data/): 53 listings.
- [Evaluation & Benchmarking](https://www.datatrain.ai/segment/evaluation-benchmarking/): 43 listings.
- [Governance & Compliance](https://www.datatrain.ai/segment/governance-compliance/): 41 listings.
- [Synthetic Data](https://www.datatrain.ai/segment/synthetic-data/): 32 listings.

## Tools

- [All tools](https://www.datatrain.ai/tools/): 335 Products for collecting, labeling, generating, and processing training data.
- [Annotation & Labeling](https://www.datatrain.ai/tool-category/annotation-labeling/): 79 listings.
- [Synthetic Generation](https://www.datatrain.ai/tool-category/synthetic-generation/): 77 listings.
- [Quality & Versioning](https://www.datatrain.ai/tool-category/quality-versioning/): 52 listings.
- [Curation & Cleaning](https://www.datatrain.ai/tool-category/curation-cleaning/): 44 listings.
- [Collection & Scraping](https://www.datatrain.ai/tool-category/collection-scraping/): 42 listings.
- [Exploration & Visualization](https://www.datatrain.ai/tool-category/exploration-visualization/): 41 listings.

## Full index

- [XML sitemap](https://www.datatrain.ai/wp-sitemap.xml): complete machine-readable list of every listing and taxonomy archive.
- [Datasets archive](https://www.datatrain.ai/datasets/), [Companies archive](https://www.datatrain.ai/companies/), [Tools archive](https://www.datatrain.ai/tools/): paginated, crawlable, filterable by facet via URL query parameters.