12 companies tracked in this category. Names and one-line descriptions are free to browse — pricing model, funding, founding year, headquarters, and cited sources are in the full dataset.
| Company | Description |
|---|---|
| Appen | Publicly listed company providing data collection, human-in-the-loop annotation, and AI data platform services to train and evaluate AI/ML models. |
| Encord | AI-native data development platform for annotating, curating, and evaluating multimodal training data used to build and validate computer vision and physical AI models. |
| Handshake | Originally a career/recruiting platform for university students, expanded into an AI data-labeling and expert-evaluation marketplace ('Handshake AI') connecting graduate-level experts with frontier AI labs. |
| iMerit | Provides data annotation, labeling, and generative AI data services (computer vision, NLP, autonomous vehicles, healthcare) via a global managed workforce. |
| Invisible Technologies | Provides a system of platforms and human expert networks for AI training data, annotation, model evaluation, and business-process automation for AI labs and enterprises. |
| Labelbox | Offers a data platform ('RL data engine') for annotating, curating, and generating RL/evaluation data used to train and improve AI models for both frontier labs and enterprises. |
| Mercor | AI-powered talent marketplace that recruits and vets expert contractors to produce specialized training data, evaluations, and RLHF work for frontier AI labs. |
| Sama | Provides data annotation, labeling, and validation services (with a focus on computer vision) for AI/ML training, operating under an 'impact sourcing' model employing workers in East Africa. |
| Scale AI | Provides data annotation, RLHF, and evaluation infrastructure/services that produce labeled training and evaluation data for machine learning and generative AI models. |
| Snorkel AI | Builds an AI data development platform combining programmatic labeling with expert-curated data and evaluation systems to train and assess frontier and enterprise AI models. |
| Surge AI | Data annotation and RLHF platform that supplies human-labeled training and evaluation data (including complex reasoning and preference data) to frontier AI labs. |
| Toloka | Crowdsourcing and human-in-the-loop data platform (spun out of Yandex/Nebius) providing data labeling, RLHF, and AI model evaluation services. |