Medical: AI training data and RL environment vendors

Vendors with public evidence of medical work. This is a shortlist by domain, not a quality ranking; multi-domain vendors appear here only when this specific domain is supported.

36 vendors. 14 state they have a SOC 2 Type I or Type II report and 9 state they can run in a customer's cloud or on-prem. These are sourced statements, not independent verification. Pending and unspecified SOC 2 claims are excluded.

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— means not publicly listed or not confirmed; it never means zero or “No”. Checked is the date a company’s facts were last checked, and each fact on its profile links to its source.

Vendor	Offerings	Domains	Data sources	Funding	Checked
AfterQueryAfterQuery sells expert-created and synthetic training datasets, reinforcement-learning environments, and custom evaluations to AI labs and enterprises developing foundation models and agents.	RL envs, Training data, Evals, Human data	Multi-domain, Coding, Computer use, Browser, Finance, Legal, Medical	Expert-made, Synthetic	$30.5M	2026-10-13
Align AIAlign AI sells expert-grounded training data, simulated RL environments, continuous evaluations, and in-runtime verification tools to AI labs and enterprises building agents for regulated, high-stakes work.	RL envs, Evals, Human data	Finance, Legal, Medical, Enterprise workflows	Expert-made	—	2026-09-29
AppenAppen supplies AI labs and product teams with human-produced training data, annotation, expert feedback, RL environments, and model evaluations for machine-learning and agentic AI systems.	RL envs, Human data, Evals, Training data, Annotation	Multi-domain, Medical, Legal, Science, Finance, Coding, Browser, Security, Enterprise workflows	Expert-made, Licensed data	—	2026-10-08
ApturaAptura provides expert-built training and evaluation data, benchmarks, and reinforcement-learning environments to AI labs and developers building systems for finance, healthcare, and legal work.	Training data, Evals, RL envs, Human data	Finance, Medical, Legal	Expert-made	$6.7M	2026-09-29
ArenaArena sells AI-model evaluations to labs, enterprises, and developers, using real-world human preferences to assess model performance and provide analytics, feedback samples, and SLA-backed results.	Human data, Evals	Coding, Legal, Medical, Science, Multi-domain	—	$450M	2026-10-13
BioStack PlatformsBioStack sells clinical and preclinical data, healthcare AI training environments, and evaluation tools to AI labs and life-sciences teams developing medical and drug-discovery models.	RL envs, Training data, Evals	Medical, Science	—	$500K	2026-09-29
CentificCentific sells multimodal AI training data, human annotation, model evaluations, and simulated enterprise RL environments to frontier AI labs and enterprise AI teams.	RL envs, Training data, Evals, Human data, Annotation	Multi-domain, Finance, Medical, Enterprise workflows, Legal, Robotics and physical	Licensed data	$60M	2026-09-29
ClaruClaru provides custom and licensed video, robotics demonstrations, and human annotations to AI labs building robotics, embodied AI, and world models.	Training data, Human data, Annotation, Evals	Robotics and physical, Games, Creative, Multi-domain, Coding, Legal, Medical, Math, Science, Security, Other	Licensed data, Expert-made, Synthetic, Open data	$170M	2026-10-13
CloudFactoryCloudFactory supplies a managed human workforce and AI platform to businesses and AI developers, collecting and annotating data, preparing model-training and fine-tuning datasets, and providing human feedback, evaluation, and operational support for AI systems.	Human data, Training data, Annotation	Multi-domain, Medical	Expert-made	$78M	2026-09-29
DataOcean AIDataOcean AI sells off-the-shelf datasets and custom data collection, labeling, and model evaluation services to AI developers and enterprises, supporting LLM, speech, vision, multimodal, and autonomous-driving systems.	Training data, Annotation, Evals, Human data	Multi-domain, Coding, Finance, Medical, Legal	Customer data, Expert-made	—	2026-09-29
Gradient HealthGradient Health sells de-identified medical imaging and multimodal clinical datasets through Atlas to medical AI developers, helping them train, test, validate, and prepare regulatory evidence for healthcare models.	Training data, Evals	Medical	—	$8.4M	2026-09-29
iMeritAcquired by EXLiMerit sells expert-led data annotation, training-data creation, human feedback, model fine-tuning and evaluation services, alongside Ango Hub workflow software, to frontier AI labs, AI developers and enterprises building multimodal and domain-specific models.	Human data, Training data, Evals, Annotation	Multi-domain, Medical	Synthetic	$24.5M	2026-09-29
InnodataInnodata provides AI developers and enterprises with training data, human feedback, annotation, reinforcement-learning environments, model evaluations, and red-teaming services for building and improving AI models and agents.	RL envs, Human data, Training data, Evals, Annotation	Coding, Computer use, Browser, Enterprise workflows, Finance, Legal, Medical, Science, Math, Security, Robotics and physical, Multi-domain	Customer data, Expert-made, Synthetic	—	2026-10-13
KledA marketplace that curates and licenses human-contributed and rights-holder datasets—including video, images, audio, and text—for AI labs, research institutions, and enterprises training models.	Human data, Training data, Annotation	Multi-domain, Medical	Licensed data, Expert-made	$14M	2026-09-29
LatchLatchBio sells cloud data and compute software, bioinformatics workflows, and AI-based analysis to biotech R&D teams, laboratories, and scientific kit or instrument providers. It also publishes evaluations and offers assessment services for biology-focused AI agents.	Evals	Science, Security, Medical	Expert-made	$163M	2026-09-29
LuelLuel licenses ready-made multimodal datasets and organizes custom collection campaigns for AI labs and developers, using paid contributors to supply rights-cleared audio, video, speech, sensor, and computer-use data.	Human data, Training data, Evals	Multi-domain, Computer use, Medical, Robotics and physical	Expert-made	$31.7M	2026-09-29
LXTLXT supplies AI developers and enterprises with custom and off-the-shelf training data, human annotation, evaluation, and RLHF services across text, speech, images, and video.	Training data, Annotation, Evals, Human data	Multi-domain, Legal, Finance, Medical, Robotics and physical	Expert-made	—	2026-09-29
MercorMercor sells expert-created training data, reinforcement-learning environments, and evaluations and benchmarks to frontier AI labs and other AI developers. It also offers enterprise data licensing and evaluation services.	RL envs, Human data, Training data, Evals	Multi-domain, Finance, Legal, Medical, Coding, Browser, Enterprise workflows	Licensed data, Expert-made, Synthetic	$483.6M	2026-10-13
micro1micro1 provides expert human data and post-training services, real-world RL environments, robotics data, and AI-agent evaluations for frontier AI labs, enterprises, and robotics teams.	RL envs, Human data, Evals, Training data	Multi-domain, Finance, Legal, Medical, Coding, Robotics and physical	Expert-made	$135M	2026-10-13
Paper InstrumentsPaper Instruments post-trains language models and builds evaluation benchmarks, post-training infrastructure, and agent software for AI developers working on knowledge-intensive tasks.	Evals, Training data, RL infra	Finance, Legal, Medical, Enterprise workflows	Synthetic, Expert-made	$3.6M	2026-09-29
ParetoPareto supplies AI labs with specialist-created training data, evaluations, and RL environments that turn expert judgment into signals for assessing and improving frontier models.	RL envs, Human data, Evals	Multi-domain, Medical, Legal, Finance, Coding, Science	Expert-made	$17.8M	2026-09-29
Perle AIPerle supplies AI labs and developers with specialist-generated multimodal training data, annotation, RLHF and model evaluations through expert-led programs and managed workflows.	Human data, Training data, Evals, Annotation	Multi-domain, Medical, Legal, Robotics and physical	Expert-made	$17.5M	2026-09-29
ProlificProlific gives AI labs and developers access to verified participants and subject-matter experts to collect human feedback, training data, and model evaluations through a platform, API, or managed research service.	Human data, Training data, Evals, Annotation	Multi-domain, Legal, Medical, Finance, Robotics and physical	Expert-made	$33.4M	2026-09-29
RefreshRefresh sells simulated software environments and verifiable evaluations for training and testing AI agents, alongside real-workflow coding datasets, to frontier AI labs and enterprises.	RL envs, Training data, Evals	Multi-domain, Coding, Computer use, Medical, Enterprise workflows	Customer data	$500K	2026-09-29
SnorkelSnorkel sells expert-built training datasets, agent environments, benchmarks and evaluations—through ready-to-use products and custom data-development services—to frontier AI labs and enterprise AI teams.	Training data, Evals, RL envs, Human data	Multi-domain, Coding, Science, Finance, Enterprise workflows, Medical, Legal	Expert-made, Synthetic	$587M	2026-09-29
SuperAnnotateSuperAnnotate sells AI data software and managed expert services to AI labs and developers, covering multimodal annotation, training data, model and agent evaluations, and reinforcement-learning environments.	RL envs, Human data, Evals, Annotation, Training data	Multi-domain, Medical, Legal, Science, Coding, Browser, Computer use, Robotics and physical, Math, Enterprise workflows, Finance	Expert-made	$67.5M	2026-09-29
SurgeSurge sells AI labs and developers expert-built training data, human feedback, evaluation benchmarks, and interactive reinforcement-learning environments to train and assess AI models and agents.	RL envs, Training data, Evals, Human data, Annotation	Multi-domain, Coding, Enterprise workflows, Finance, Medical, Science, Math, Legal	Expert-made	—	2026-09-29
SymbalSymbal supplies AI labs with multimodal post-training datasets, private evaluations and benchmarks, and human-in-the-loop data; it also builds enterprise agents using customers’ first-party workflows.	Training data, Evals, Simulation	Multi-domain, Science, Math, Finance, Medical, Legal, Robotics and physical, Coding	Customer data	—	2026-09-29
TaskUsTaskUs provides outsourced AI data operations for AI developers and enterprises, including data collection and labeling, expert feedback and RLHF, model evaluations and red-teaming, and robotics data services.	Training data, Human data, Evals, Annotation	Robotics and physical, Medical, Enterprise workflows, Multi-domain	Expert-made	$279M	2026-10-13
TELUS DigitalAcquired by TELUSTELUS Digital supplies AI labs and developers with expert-built training data, annotations, agentic RL environments, red-team testing and evaluations, plus custom multimodal and physical-AI datasets and managed data-collection services.	RL envs, Human data, Training data, Evals, Annotation	Coding, Enterprise workflows, Finance, Legal, Medical, Math, Robotics and physical, Science, Security, Other, Multi-domain	Expert-made, Customer data	—	2026-10-13
The General Data CompanyThe General Data Company licenses anonymized records and workflow-based datasets from European businesses to AI labs for model training and evaluation, including held-out benchmarks and reinforcement-learning environments.	RL envs, Training data, Evals	Finance, Legal, Medical, Enterprise workflows	Licensed data, Expert-made	—	2026-09-29
ThetaTheta sells custom simulated work environments and hands-on implementation to AI labs and enterprises, helping them train and evaluate specialized agents on realistic, multi-step business workflows.	RL envs, Evals, RL infra	Multi-domain, Computer use, Browser, Enterprise workflows, Finance, Medical, Coding	Customer data, Expert-made	$500K	2026-09-29
TuringTuring supplies AI labs with training data, evaluations, and RL environments for coding, enterprise knowledge work, and STEM. It also helps large enterprises build and deploy AI agents in important workflows.	RL envs, Training data, Evals, Human data	Multi-domain, Coding, Enterprise workflows, Science, Math, Finance, Legal, Medical, Computer use, Security	Customer data	$225M	2026-10-13
Uber AI SolutionsUber AI Solutions provides custom AI data collection and annotation, specialist human feedback and RLHF, red-teaming, and model evaluation for frontier labs, enterprises, robotics firms, and autonomous-vehicle developers.	Annotation, Training data, Evals, Human data, RL envs	Coding, Enterprise workflows, Finance, Legal, Medical, Science, Robotics and physical, Multi-domain, Other	Expert-made, Customer data	—	2026-10-09
Vals AIVals AI sells evaluation software, expert-built benchmarks, and review tools to AI labs and enterprise engineering teams testing models and AI applications on practical, domain-specific tasks.	Evals, RL infra	Multi-domain, Finance, Legal, Medical, Coding, Math	Expert-made	$45M	2026-09-29
Vetto AIVetto sells AI labs and developers expert post-training data, human evaluation, custom RL environments, and verifier-graded benchmarks to help train and assess models on practical tasks.	RL envs, Training data, Evals, Human data, Annotation	Multi-domain, Science, Medical, Legal, Finance, Coding, Computer use	Expert-made	$3.6M	2026-09-29

— not publicly listed or not confirmed. Open a profile for each fact’s source. The register is unranked; sorting only reorders.

How to read domain and SOC 2 labels

Multi-domain means work across several task areas, not every area. Vendors appear in a specific domain filter only when that area has supporting evidence. SOC 2 entries are vendor statements, not independently verified audits: Unspecified means claimed without a stated type; Pending means in progress; Not publicly listed means we found no public statement. None of those means a completed Type I/II report. SOC 2 and deployment details remain on profiles and in comparison.