stem Data Annotation Companies

Compare 17 company profiles. Verify current services, application requirements and availability directly.

Location matches come from imported role listings and do not establish current country eligibility.

  • Mercor

    Mercor is a remote talent platform that recruits professionals to help leading AI labs and enterprises train and evaluate frontier models. Its project marketplace covers software engineering, law, finance, medicine, research, languages, quality assurance and multimodal data work. Recent public listings ranged from abo…

  • Micro1

    micro1 recruits subject-matter experts in engineering, medicine, finance, law, language and other fields for remote AI-training projects. Applicants can apply to a listed opportunity or certify skills for future matching. Its public FAQ says certification does not guarantee immediate placement, and its global recruiti…

  • Ethos

    Ethos (AskEthos) is an AI expert network that matches experienced professionals, including lawyers, clinicians, finance analysts, engineers and researchers, with paid AI model training and evaluation work, expert calls and advisory projects. Instead of an application form, every expert is onboarded by an AI voice agen…

  • SME Careers

    SME Careers is SuperAnnotate's contributor platform connecting subject matter experts with remote, project-based AI training and evaluation work. Its opportunities span software, mathematics, science, medicine, law, finance, languages and creative fields. Applicants build a profile, complete role-specific screening an…

  • Acgence

    AI Data Collection Services

  • Appen

    Data annotation services for AI and ML models, data collection, evaluation, image, audio, and video annotation

  • Blomega

    Broad/Unclear specialization

  • CloudFactory

    Data annotation services (2D/3D, computer vision, NLP), data curation

  • OpenTrain AI

    Broad/Unclear specialization

  • Reality AI

    Broad/Unclear specialization

  • Samasource

    Data annotation solutions (image, video, 3D point cloud data), Generative AI, computer vision, data automation platform with Human-in-the-Loop (HITL)

  • Sapien

    Data annotation for LLMs, documents, images, text, audio, video, LiDAR, fine-tuning LLM models with human feedback, autonomous driving, education technology

  • Scale

    Data annotation, collection, & curation for LLMs, generative AI, computer vision, image annotation, semantic segmentation, 3D point cloud annotation, LiDAR and RADAR annotation (especially for self-driving cars)

  • Snorkel AI

    Broad/Unclear specialization

  • Telus Digital

    Broad/Unclear specialization

  • Turing

    Turing is a global remote-work and AI infrastructure platform that recruits software engineers, researchers and domain experts for application engineering and frontier-model training. Current referral opportunities include scientific coding, AI response evaluation, research, languages, creative work and medical review…

  • iMerit

    Data annotation and model fine-tuning (image, video, LiDAR, text data), computer vision, geospatial technology