Medical AI training data providers.
41 companies say on their own websites that they sell datasets and work on medical. 23 of them have revenue, a valuation or funding on record, and come first, largest first. Each line below is the company's own description, linked to the page it is on.
“Diverse datasets spanning professional, coding, research, agentic, and multimodal tasks.” its page
Data comes from: made by experts and contractors, replicas of real software, generated, licensed from its owners.
“Our off-the-shelf datasets are the same: thousands of hours of expert reasoning, pre-built and ready to use today, spanning RL environments, coding, and the core capabilities every model needs.” its page
Data comes from: made by experts and contractors.
“The environment where domain experts create, review, and deliver complex datasets across industries like healthcare, legal, finance, and more” its page
Data comes from: made by experts and contractors.
“High-quality training data, annotations, and RLHF to power the world's most advanced AI models.” its page
Data comes from: made by experts and contractors, replicas of real software.
“End-to-end evaluation and training data. Managed for you From evaluator specification to data delivery - with the reproducibility and transparency your research demands.” its page
Data comes from: made by experts and contractors.
“Pre-built AI training datasets for LLMs. Scalable, expert-curated data for model training, evaluation, and reasoning performance.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“We offer frontier AI labs custom and off-the-shelf datasets, RL environments, and human experts in software engineering, enterprise knowledge work, and frontier STEM.” its page
Data comes from: made by experts and contractors, replicas of real software.
“We helped a leading tech giant to build a diverse, egocentric dataset to solve this.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“Appen provides specialist LLM training data across the full development pipeline, from initial fine-tuning demonstrations through to the expert preference feedback and adversarial testing that alignment requires.” its page
Data comes from: recorded from people and the real world, made by experts and contractors, licensed from its owners, generated.
- AfterQuery
#13 overall, $100M revenue, run rate, Apr 2026
“Offers ready-to-deploy datasets across high-demand capability areas” its page
Data comes from: made by experts and contractors, recorded from people and the real world, generated, the client's own data.
“Expert-built, verified by code, and proven to transfer. ... License our off-the-shelf data for eval, SFT or RL.” its page
Data comes from: recorded from people and the real world, made by experts and contractors, generated.
“A larger, privately held dataset, which we license to companies for their own internal validation.” its page
Data comes from: made by experts and contractors.
“We curate high-quality datasets, including video, music, and transcriptions, enriched with metadata to ensure accurate, ethical AI training and optimal model performance.” its page
Data comes from: licensed from its owners, made by experts and contractors, recorded from people and the real world.
“Training-ready data for physical AI, collected by in-field operators and at our teleoperation facilities.” its page
Data comes from: made by experts and contractors, recorded from people and the real world, generated.
- CloudFactory
#26 overall, $65M raised in total
“We transform messy, unstructured, or incomplete data into high-quality datasets, creating the foundation for reliable AI models.” its page
Data comes from: made by experts and contractors.
- Defined.ai
#27 overall, $62.3M raised in total
“Access off-the-shelf ethically sourced and high-quality datasets across audio, image, video, text, and multimodal formats” its page
Data comes from: recorded from people and the real world, made by experts and contractors.
“Centific’s Data Marketplace provides a centralized, self-service platform to discover, enhance, and deliver trusted datasets from both Centific and third-party sources at scale.” its page
Data comes from: recorded from people and the real world, licensed from its owners, the client's own data, made by experts and contractors.
- SuperAnnotate
#30 overall, $49.5M raised in total
“Versioned, audited datasets with full lineage from raw signal to train set.” its page
Data comes from: made by experts and contractors.
“Original corpus of 1,000 Chain of Thought math problems, including step-wise corrections and annotation, intersecting 60+ disparate subdomains of formal and applied mathematics.” its page
Data comes from: recorded from people and the real world, made by experts and contractors.
- BioStack Platforms
#41 overall, $9.5M raised in total
“Get novel pre-clinical and medical datasets, perform causal inference, and generate data points for pre / post training.” its page
Data comes from: recorded from people and the real world, made by experts and contractors.
“Access continuously refreshed, expert-labeled multimodal data designed for teams building real-world robotics systems.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“A 30M cell observational atlas spanning 150 diseases, 200 tissues and 27 technologies” its page
Data comes from: public data, made by experts and contractors.
- Gradient Health
#52 overall, $2.8M raised in total
“Gradient Health is a medical technology company providing foundation model-scale medical imaging datasets to accelerate equitable health innovations.” its page
Data comes from: licensed from its owners.
“Datasets with repository patches, programming problems, and code comprehension tasks.” its page
Data comes from: made by experts and contractors, licensed from its owners, recorded from people and the real world.
“High-quality datasets. Domain-specific data that reflects the real complexity of regulated work.” its page
Data comes from: made by experts and contractors.
“We source long-form, natural conversations between real speakers so voice models learn interruptions, turn-taking, accent variation, and messy production speech.” its page
Data comes from: recorded from people and the real world, made by experts and contractors.
“Cerebro is now the data refinery that turns raw operational data into training-grade datasets: SFT data, RL data, and RL environments graded on real outcomes.” its page
Data comes from: the client's own data, generated.
“We empower more than 900 AI enterprises with our high-quality off-the-shelf datasets, and magnificent data collection & labeling services.” its page
Data comes from: recorded from people and the real world.
“Build reusable and reliable systems for producing high-quality synthetic data, tasks, and verifiers” its page
Data comes from: made by experts and contractors, generated.
“Humyn Labs builds custom AI training datasets across voice, image, video, and sensor modalities collected and annotated by verified domain experts with multi-layer quality control.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“Large-scale conversational datasets across 22 official Indian languages.” its page
Data comes from: recorded from people and the real world.
“Collect, annotate, and ship training-ready egocentric and multimodal robotics datasets with verified quality.” its page
Data comes from: recorded from people and the real world, made by experts and contractors.
“PhDs and professionals in mathematics, medicine, law, finance, and engineering providing expert-grade training data.” its page
Data comes from: made by experts and contractors.
“Read Perplexity's DRACO announcement and technical report, or explore the DRACO dataset on Hugging Face.” its page
Data comes from: generated, made by experts and contractors.
“An SFT dataset of real developer workflows from 2K repositories with pre-resolved dependencies and Docker containers.” its page
Data comes from: made by experts and contractors, generated, replicas of real software.
“We’ve built Sepal AI - the data development platform that enables you to curate useful datasets.” its page
Data comes from: made by experts and contractors, generated.
“Shaip’s AI Data Catalog & Licensing Marketplace gives AI teams a single source for buying and licensing pre-labeled, commercially cleared training datasets across text, speech, image, video, and multimodal formats.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“from building high-quality training datasets to delivering production-ready models” its page
Data comes from: the client's own data.
“We prepare ready-to-use and custom datasets supporting a range of AI use cases” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
“Pre-built datasets spanning RL environments, coding, and core capabilities.” its page
Data comes from: made by experts and contractors, the client's own data.
“Scripted and spontaneous recordings from diverse speaker populations.” its page
Data comes from: made by experts and contractors, recorded from people and the real world.
