Appen

Appen delivers expert human data for frontier AI. With 30 years of pioneering data excellence, we help teams build, train, and deploy trustworthy AI models. We provide specialized data products including Frontier Alignment (CoT reasoning, SME RLHF, SFT & red teaming), Agentic AI (agent trajectories, RL environments & tool-use logs), Speech & Audio (expressive TTS, emotion detection & dialectal speech), Multimodal AI (VLM data, video annotation & cross-modal alignment), Physical AI (LiDAR annotation, robotics trajectories & sensor fusion), and Model Integrity (hallucination benchmarking, bias & compliance audits). Our platform leverages 1M+ vetted contributors, covers 500+ global locales, and is SOC 2 & ISO 27001 certified. We offer independent model evaluation and have been a trusted partner for leading AI labs for three decades.