Data annotation companies hiring
These platforms hire people to label data, train models with RLHF, and evaluate LLM output. Open a company page for current roles.
8 companies tracked · 3 with roles on the board right now
Micro1 jobs
HotMicro1 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.
297 open roles
Palo Alto, CA · Founded 2022 · $2.5B
Mercor jobs
HotMercor 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.
290 open roles
San Francisco, CA · Founded 2023 · $20B
DataAnnotation jobs
HotDataAnnotation 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.
79 open roles
Remote
AfterQuery jobs
HotAfterQuery 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.
No roles on the board today
San Francisco, CA · Founded 2025 · $300M
Handshake AI jobs
HotHandshake 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.
No roles on the board today
San Francisco, CA · Founded 2013 · $3.5B
HireCade jobs
GrowingHireCade 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.
No roles on the board today
Remote · Founded 2025
Scale AI jobs
UnicornScale 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.
No roles on the board today
San Francisco, CA · Founded 2016 · $29B
Surge AI jobs
HotSurge 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.
No roles on the board today
San Francisco, CA · Founded 2020 · $25B