Build Your Career InData AnnotationAnd AI Training

Scale AI is the leading AI data foundry behind frontier language models, autonomous vehicles, and U.S. government AI programs, providing human data labeling, RLHF, and model evaluation at scale.

Surge AI is a bootstrapped, zero-VC RLHF and data labeling platform built by Edwin Chen, powering frontier labs like OpenAI, Anthropic, and Google with high-quality human feedback and training data.

Mercor is an AI-native talent marketplace connecting vetted domain experts such as doctors, lawyers, and engineers directly with frontier AI labs for RLHF, evaluation, and specialized training data at massive scale.

DataAnnotation hires remote contractors to train and evaluate AI models, from generalist review work to specialist tracks in coding, law, medicine, and finance. Its own site reports more than 100,000 contributors and over $150M paid out to date.

Handshake AI turns the career platform's network of 20M+ students, alumni, and PhD candidates into a data labeling and RLHF marketplace, supplying expert human feedback to frontier AI labs alongside its core recruiting business.

Micro1 is a fast-scaling AI training data platform that pivoted from its AI recruiting agent, Zara, into expert data labeling and RLHF, vetting doctors, lawyers, and engineers for frontier AI labs.

AfterQuery is a Y Combinator-backed applied AI research lab building expert-curated datasets and RL environments that capture professional reasoning in law, medicine, finance, and engineering for frontier model training.

HireCade is a bootstrapped, founder-led AI recruiting and video interview platform that sources, vets, and places domain experts for AI data annotation and RLHF work with frontier AI labs.