Sell Training Data
Training data is a category, not a product. Some of it is free, some of it is a service business, and the part that is neither is where suppliers get paid.
What counts as training data
The term covers text corpora, images, audio, video, sensor data, and the annotations attached to any of them. Buyers use it to mean "the material a model learns from", which includes raw content, labeled content, and increasingly the evaluation sets used to test models after training.
Before anything else, check which of these you actually hold. Most suppliers who arrive with "training data to sell" hold one of three things: public data, service capability, or a genuine collection. Only the third is a product.
Why free data is not a product
A large share of the material that could be called training data is already free. Web text is crawled at scale, public corpora are released openly, and donated speech projects cover many languages. If what you hold is a copy of something public, it has no market: buyers who want it can take it themselves, and they know where it is.
This is the part of the market that is genuinely commoditized, and it is where most "how do I sell my data" disappointment comes from. The data was never the asset. What has value is data that is not publicly available and cannot be assembled by anyone with a crawler.
What is actually sellable
Three kinds of supply move in this market. Licensed content with a documented rights chain — material someone owns and can grant use of, where the paperwork is the product as much as the content. Niche collections that match a live specification — rare languages, unusual conditions, specific domains. And annotated data, where the labels were produced by people with the skill the buyer needs.
All three share one property: they cannot be got for free. That is the test to apply to anything you are considering offering. If a competent buyer could assemble it themselves in a week, it is not a product.
The most common reason a supplier is turned away in this market is not quality — it is rights. If you cannot document that you own the material or hold consent for the people in it, it cannot be bought, at any volume and at any price.
The part that is really a service business
A large share of what gets called "selling training data" is actually selling data work: collecting to a specification, annotating, evaluating, quality-checking. This is where most supplier revenue lives, because demand for execution is steadier than demand for any particular file.
Two rules govern the service side. First, data is bought against a specification — a defined volume, format, quality bar, and date — and work that matches no requirement cannot be invoiced. Second, money follows acceptance: the buyer's QA decides whether a batch is paid, and the criteria are set before production, not after.
The exclusions apply here as everywhere: recorded telephone calls, medical or clinical data, and scraped personal data are declined. And no public submission portal exists at any major lab — OpenAI, Google, and Anthropic buy through data teams and vendors, not from uploads, and anyone charging you to submit data to them is selling a story.
Questions we get asked
Can I sell data I scraped from the web?
No. Scraped personal data is declined by serious buyers and is illegal to trade in some jurisdictions. Web-scale text exists, but it moves through licensed deals, not through suppliers who ran a crawler.
Is my industry dataset worth selling?
Possibly, if you own it and it is not public. The questions are whether a live requirement exists for that domain and whether your rights are documentable. Both have to be yes.
Do you buy data, or only source it?
We source to order — we bring specifications to suppliers rather than buying inventory on speculation. From your side that means you are paid for work that has a buyer attached, not for stock that might sell later.
Keep reading
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AI Data Brokerage
A data broker sits between the people who need training data and the people who can produce it. We source to order — no inventory, no license resale, no recycled datasets.
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AI Training Data Providers
What to check before you sign with a training data provider — and how we compare on each point.
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AI Training Data Marketplace
Marketplaces sell what already exists. We source what you actually need. Here is when each model makes sense.
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Full data catalog
36 data categories across 120 languages, and how to specify each one.
Submit a sourcing request
Tell us the language, the hours, and what the data needs to look like. You will get a real number and a real timeline — not a range. If we cannot source it well, we will tell you that instead.
- Pilot batch before the full run, so problems surface early.
- Consent documentation delivered with the data.
- No medical or clinical data. No recorded telephone calls.