# AI training data companies

URL: https://aidataforsale.com/companies
Publisher: AI Data For Sale (Marketing Signals Ltd)
Updated: 2026-11-10

A directory of AI training data companies: labeling vendors, expert networks, data marketplaces, cloud exchanges and licensors. What each does, with alternatives.

Who does what in the AI training data market, from labeling vendors to marketplaces and licensors. A directory, not a ranking.

## In short

- AI data companies fall into a few groups: labeling and expert vendors, AI data marketplaces, cloud data exchanges, open hubs, licensors and wind-down platforms.
- Labeling vendors create new data with their own workforce; marketplaces and brokers help license data that already exists.
- Every profile sticks to sourced facts and lists what to check before you sign.

## How to read this directory

Each profile explains what the company does, where it fits, and what to check before working with it. Profiles cite their sources and avoid claims we cannot verify. We are a broker, so we also explain where a broker fits, but we do not rank companies or accept payment for listings.

## Which kind of company do you need?

| You want to | Look at |
| --- | --- |
| Have people label or write data to your spec | Labeling and expert vendors |
| Buy a ready-made dataset | AI data marketplaces |
| Subscribe to a structured data feed | Cloud data marketplaces |
| Use open data | Open dataset hubs |
| License a private archive you hold | A broker, a governed marketplace or a direct deal |
| Sell assets as a company closes | Wind-down platforms or a broker |

Read [broker vs marketplace](https://aidataforsale.com/learn/ai-data-broker-vs-marketplace) for the trade-offs, or see side-by-side [comparisons and lists](https://aidataforsale.com/compare).

## Questions

### Is this a ranked list?

No. Companies are grouped by what they do. We do not rank them or take payment for profiles.

### Can I suggest a correction?

Yes. Email hello@aidataforsale.com with the source and we will review it under our [editorial policy](https://aidataforsale.com/editorial-policy).

## Pages in this section

- [Scale AI](https://aidataforsale.com/companies/scale-ai): Scale AI labels and creates training data for AI developers, using a large contract workforce.
- [Surge AI](https://aidataforsale.com/companies/surge-ai): Surge AI was founded in 2020 by Edwin Chen and focuses on RLHF, RL environments and language annotation.
- [Mercor](https://aidataforsale.com/companies/mercor): Mercor began as an AI hiring platform and now supplies AI labs with experts such as scientists, doctors and lawyers.
- [Appen](https://aidataforsale.com/companies/appen): Appen is listed on the Australian Securities Exchange and runs a network of about 1 million contributors in more than 500 languages.
- [Labelbox](https://aidataforsale.com/companies/labelbox): Labelbox sells software for labeling and reviewing AI training data.
- [Prolific](https://aidataforsale.com/companies/prolific): Prolific recruits vetted participants for studies, and offers human evaluation and data collection for AI models.
- [Defined.ai](https://aidataforsale.com/companies/defined-ai): Defined.ai sells text, speech, audio, image and video datasets, and invites organizations to sell data through it.
- [Protege](https://aidataforsale.com/companies/protege): Protege connects organizations holding proprietary data with AI developers for training and evaluation.
- [Human Native](https://aidataforsale.com/companies/human-native): Human Native was founded in 2024 to connect creators and rights holders with AI developers.
- [AWS Data Exchange](https://aidataforsale.com/companies/aws-data-exchange): AWS Data Exchange lets qualified providers sell data products to AWS customers.
- [Snowflake Marketplace](https://aidataforsale.com/companies/snowflake-marketplace): Snowflake Marketplace lets providers publish free or paid listings to Snowflake customers.
- [Databricks Marketplace](https://aidataforsale.com/companies/databricks-marketplace): Databricks Marketplace lists datasets, notebooks, AI models, apps and MCP servers.
- [Hugging Face](https://aidataforsale.com/companies/hugging-face): Hugging Face hosts community datasets as Git repositories, each with a dataset card.
- [Shutterstock](https://aidataforsale.com/companies/shutterstock): Shutterstock made $104 million from AI licensing deals in a year, Bloomberg reported in June 2024.
- [Troveo](https://aidataforsale.com/companies/troveo): Troveo licenses unused and unpublished video from creators to AI companies.
- [SimpleClosure](https://aidataforsale.com/companies/simpleclosure): SimpleClosure added data sales to its Asset Hub in April 2026.