Vendor reviews
The AI training-data market, reviewed fairly.
Buyers compare providers before they license. Most of what ranks for those searches is written by the vendors themselves. These reviews are honest about where each company is — and is not — the right answer, judged on the axis this market actually turns on: rights and provenance.
Best speech data providers
Best video licensing providers
Best AI training data marketplaces
Methods, compared
Before picking a vendor, pick a sourcing model. These guides weigh the recurring debates on provenance, consent, cost shape, and diligence risk — and say when each side genuinely wins.
Licensed vs. scraped training data
Licensed vs Scraped: provenance, consent, cost shape, and when each wins.
Synthetic vs. real training data
Synthetic vs Real: provenance, consent, cost shape, and when each wins.
Crowdsourced vs. licensed data
Crowdsourced vs Licensed: provenance, consent, cost shape, and when each wins.
All reviews
Defined.ai
One of the older marketplaces for licensed training data — broad multi-modal catalog, marketplace model.
Appen
A large, long-established crowd data-collection and annotation company — scale is the story.
Scale AI
Long the reference name for data labeling and RLHF — reshaped in 2025 by Meta’s investment and a pivot toward enterprise and government work.
Surge AI
A quality-first labeling and RLHF provider founded in 2020 — reported to have passed Scale in revenue in 2024.
Troveo
A video-led licensing marketplace with multi-modal reach — footage, audio, robotics, and gaming data licensed from source.
Protege
A governed marketplace for AI training data, venture-backed, provenance-forward messaging.
Shaip
Healthcare-leaning data collection and annotation, plus off-the-shelf datasets.
Getty Images (AI licensing)
A stock giant whose AI-training licensing runs through negotiated partnerships — there is no open, self-serve program.
Opendatabay
A young UK marketplace for buying and selling AI-ready datasets — breadth and self-serve convenience, with a licensing-first pitch still being proven.
Versos AI
A Canadian video-intelligence platform that turns studio archives into licensable AI training datasets — anchored by a CuriosityStream partnership and aimed squarely at world-model builders.
The Vocal Market
A singing-vocal marketplace with an enterprise data-licensing arm — consent-documented vocal stems for AI music and voice teams. In a niche almost nobody serves cleanly, small scale is the trade-off.
Sapien
A crypto-native take on crowd data work — gamified labeling with token incentives, now repositioning around onchain Proof of Quality attestations.
Pangeanic
A Spanish language-technology veteran selling multilingual datasets, bespoke collection, and alignment services — with a sovereign-AI, keep-it-in-your-infrastructure bent.
Nexdata
One of the largest Chinese AI-data vendors — a decade-plus-old catalog machine with 1,000+ off-the-shelf datasets and collection and annotation services at industrial scale.
Way With Words
A South Africa-rooted human transcription house, in business since 2002, that has grown a speech-data arm — custom ASR datasets with matched transcripts, built on human QA rather than crowd scale.
Shutterstock (data licensing)
The stock giant that turned its library into one of the largest AI-licensing businesses on record — nine-figure revenue and frontier-lab customers. After the Getty merger collapsed in July 2026, it stands alone again.