Legal: AI training data and RL environment vendors
Vendors with public evidence of legal work. This is a shortlist by domain, not a quality ranking; multi-domain vendors appear here only when this specific domain is supported.
Legal: AI training data and RL environment vendors
31 vendors. 12 state they have a SOC 2 Type I or Type II report and 10 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.
— 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.
| Compare | 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 | |
| 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 | |
| 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 | |
| HandshakeHandshake supplies frontier AI developers with expert-created training and evaluation data, reinforcement-learning environments, and licensed, de-identified operational records from real companies. | Human data, Evals, RL envs, Training data | Multi-domain, Legal, Finance, Science | Licensed data, Expert-made | $435.5M | 2026-10-13 | |
| IdlerIdler sells reinforcement-learning environments, benchmarks and evaluation datasets based on production work to AI labs and other teams training and evaluating models. | RL envs, Evals | Multi-domain, Enterprise workflows, Legal, Coding, Security | — | $9.5M | 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 | |
| Invisible TechnologiesInvisible sells expert-created training data, model fine-tuning, evaluations, and custom reinforcement-learning environments to AI labs and developers; it also provides AI software and implementation support for enterprises. | RL envs, Training data, Evals, Human data, Annotation | Multi-domain, Coding, Finance, Legal, Enterprise workflows | Expert-made | $144M | 2026-09-29 | |
| LabelboxLabelbox sells simulated reinforcement-learning environments, expert-generated preference and training data, and evaluation services to frontier AI labs; it also offers enterprise teams software for running agents on real company workflows. | RL envs, Human data, Evals, Training data, Annotation, RL infra | Multi-domain, Coding, Computer use, Security, Enterprise workflows, Science, Robotics and physical, Finance, Legal | Licensed data | $189M | 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 | |
| Poindexter LabsPoindexter Labs supplies expert data annotation and evaluation services to frontier AI teams, alongside syncronus, a collaborative platform for expert-led model training. | Human data, Evals, Annotation | Finance, Legal, Multi-domain | Expert-made | — | 2026-10-06 | |
| 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 | |
| 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 | |
| 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 | |
| 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 |
No vendor matches every filter. Filters in different groups must all match. Remove one to widen the list:
— 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.