# Compare AI data companies and options

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

Side-by-side comparisons of AI training data companies, alternatives to the best-known vendors, and sourced lists of where to buy and sell AI data.

Head-to-head comparisons, alternatives and lists, built on the same sourced facts as our company profiles.

## In short

- Comparisons use the same criteria for every company and cite a source for each fact.
- Lists are grouped by what a company does, not ranked.
- We are a broker and appear on some pages, clearly labeled.

## How we compare

Every page compares companies on what they do, who they serve, how they work with data holders and what to check before signing. We do not score or rank companies, and no one pays to appear. Where a fact is not published, we say so rather than guess.

> We are a broker, so we are one of the options on some of these pages. We label ourselves, use the same criteria for everyone and cite sources for every fact about other companies. Read our [editorial policy](https://aidataforsale.com/editorial-policy).

## Questions

### Do companies pay to be included?

No. Inclusion is based on relevance to AI training data, and we cite sources for every fact.

## Pages in this section

- [Scale AI vs Surge AI](https://aidataforsale.com/compare/scale-ai-vs-surge-ai): Both create training data for frontier AI labs using large expert workforces.
- [Mercor vs Scale AI](https://aidataforsale.com/compare/mercor-vs-scale-ai): Mercor matches AI labs with domain experts and charges an hourly finder's fee and matching rate.
- [Defined.ai vs Protege](https://aidataforsale.com/compare/defined-ai-vs-protege): Defined.ai sells ready-made text, speech, image and video datasets and invites organizations to sell through it.
- [AWS Data Exchange vs Snowflake Marketplace vs Databricks Marketplace](https://aidataforsale.com/compare/aws-data-exchange-vs-snowflake-vs-databricks): All three let providers sell data to customers of their cloud platform.
- [AI data broker vs data labeling vendor](https://aidataforsale.com/compare/data-broker-vs-data-labeling-vendor): A labeling vendor uses its workforce to create or annotate data to your specification.
- [Scale AI alternatives](https://aidataforsale.com/compare/scale-ai-alternatives): Closest like-for-like alternatives are other vendors that create data with expert workforces: Surge AI and Mercor.
- [Defined.ai alternatives](https://aidataforsale.com/compare/defined-ai-alternatives): For selling health and real-world data, Protege pays a revenue share each time data is used.
- [SimpleClosure alternatives](https://aidataforsale.com/compare/simpleclosure-alternatives): SimpleClosure's Asset Hub has handled more than 150 deals, per MIT Technology Review.
- [Where to sell data to AI companies](https://aidataforsale.com/compare/where-to-sell-data-to-ai-companies): The right place depends on your data type, whether it is public or private, and whether you want a revenue share or a fixed fee.
- [AI data marketplaces](https://aidataforsale.com/compare/ai-data-marketplaces): AI-specific marketplaces focus on training data and its rights; cloud marketplaces focus on delivery to their customers.
- [AI training data vendors](https://aidataforsale.com/compare/ai-training-data-vendors): Vendors differ in model: finished data (Scale AI, Surge AI, Appen), expert time (Mercor), tools plus experts (Labelbox) and participant panels (Prolific).
- [Expert networks for AI training](https://aidataforsale.com/compare/expert-networks-for-ai-training): Mercor reported over 30,000 experts earning an average of more than $85 an hour.
- [Companies that buy data from closed startups](https://aidataforsale.com/compare/companies-that-buy-startup-data): Buyers include foundation AI labs, vendors building simulated workspaces, and companies training their own models.
- [Ways to monetize company data](https://aidataforsale.com/compare/ways-to-monetize-company-data): AI training licenses are the newest route and can pay for archives that had no other market.