The best AI training platforms, ranked

AfterQuery

Expert reasoning capture

Expert reasoning and rubrics for frontier labs, weekly Stripe pay.

AITraining.jobs projects

Expert projects run by AITraining.jobs

Paid expert projects we run ourselves for companies building AI: professionals grade, write and compare AI output in their own field, paid for every hour, onboarding included.

Aligned Labs

Elite expert network

Expert network for frontier AI labs (OpenAI's logo on its home page) where experts set their own hourly rate for RLHF and evals.

Alignerr

Expert task-authoring

Design the training tasks in your own professional domain.

Anthropic

Frontier lab, four-month expert fellowships

Claude's maker hires US PhDs for four-month fellowships that build the datasets and RL environments Claude trains on.

Anyone AI

Expert AI-trainer contracts (Latin America, Europe)

Hourly expert contracts (STEM, software, quant finance) for AI lab projects, from a Latin American AI training company.

Braintrust

Talent network, 0% talent fee

Keep all of your pay: published per-role bands, no talent fees.

Claru

AI lab data business (video capture + expert evaluation)

Reka AI's data business: paid first-person phone video capture and expert AI evaluation.

Cohere

AI lab hiring contract annotation specialists in Canada

Enterprise AI company hiring part-time contract data annotation specialists in Canada, CAD 30 to 40 an hour.

DataAnnotation

Assessment-gated contractor

Reliable-paying generalist and expert work for educated writers.

Datacurve (Shipd)

Coding-bounty network

Bounties paying vetted engineers to build frontier coding datasets.

Deccan AI (Soul AI)

Invite-only expert data

PhD and specialist data: SFT/RLHF, RL environments, evals.

Edison Scientific

AI scientist company paying PhD scientists on contract

AI scientist company paying PhD scientists in biology and chemistry about $100 an hour on average, per deliverable, part-time and remote, to build its evaluation and training data.

Elsevier Health

Publisher hiring clinicians part time to grade its AI

The publisher's health division hires nurse educators and allied health clinicians on part-time contracts to grade its AI's answers, $55 to $80 an hour.

EvolutionIQ

Insurance claims AI paying experienced claims adjusters on a paid project

Insurance claims AI company paying experienced workers' compensation adjusters to validate its AI's summaries and recommendations, remote in the US.

Fleet AI

RL-environment fellowship

Fellowship behind Fleet's enterprise RL environments: RLHF and expert evaluation.

Handshake AI

Credentialed US talent

Degree-holding US trainers, with hourly contract roles on its live board.

Hashlist

Paid AI evaluation tasks for engineers

Engineers build paid AI evaluation tasks (sandboxed environments, reference solutions, verifier tests) on Hashlist's data platform.

Headway

Mental-health network hiring licensed therapists to evaluate its AI

Mental-health provider network that posted a $125-an-hour contract for licensed therapists to test its AI products against clinical rubrics; the role has been off its job board since 29 Oct 2026 (read again 2 Nov 2026).

Invisible

Expert project network

Freelance AI-trainer projects, pay stated per project.

Inworld AI

Realtime voice AI lab paying US voice and audio professionals on contract

Realtime speech AI lab paying US contractors with trained ears (audio production, voice acting, broadcast, linguistics) $20 to $55 an hour to rate and test its voices before release.

JazzX AI

Lending AI company paying commercial lending experts on contract

AI digital workers for lending, paying senior commercial lending experts on contract to build its scenario library and validation rubric, remote.

Kastle

Mortgage AI company paying mortgage servicing agents part-time to train its voice AI

Mortgage servicing AI company paying experienced servicing agents $30 an hour, part-time and remote, to annotate and test its voice agents.

Lifted (Upwork)

Enterprise freelance projects (Upwork subsidiary)

Upwork's enterprise arm, posting AI-training projects for an unnamed enterprise client: engineers, coders, finance experts and transcriptionists on Upwork contracts.

Limbic

Clinical AI company paying licensed therapists per transcript reviewed

Mental-health AI company paying US-licensed therapists $3 a transcript to review its AI therapy calls, on a rolling advert.

Mercor

Expert credential marketplace

Premium expert network: physicians, lawyers, engineers, PhDs.

micro1

AI-vetted expert marketplace

Zara AI-interview vetting, then expert data work at published hourly rates.

Mindrift

Freelance specialist projects

Toloka-backed freelance projects: coding, STEM, legal, consulting.

Mistral AI

AI lab hiring annotation quality reviewers

Paris AI lab hiring code and finance data annotation quality specialists to audit the annotations that train and evaluate its models.

OpenTrain AI

Aggregator + marketplace

A unified board of AI-training jobs with real per-role pay.

Outlier (Scale AI)

Expert queue (Scale AI)

Scale AI's contributor arm, now leaner and shifted toward technical experts.

Pareto AI

Selective expert contributors

Selective vetted experts; the judgment no one has figured out how to grade.

Pasiflora AI

Credentialed expert network

NVIDIA Inception expert-data startup pairing PhD, MD and JD experts with AI labs.

Perle Labs

Web3 expert network

AI-data company with paid hiring gigs (transcription, audio, video) and a crypto Points app.

PointClickCare

Health-records company hiring nurses to label clinical notes for AI

Senior-living health-records company hiring RNs and NPs on part-time contracts to label the clinical notes that train its AI, $37.50 to $40.40 an hour.

Prime Intellect

RL-environment bounty hub

Open RL-environment hub whose paid bounty program is now closed.

RealTrainAI

Credential-matched network

Credential-matched network routing MDs, JDs, PhDs, and generalists to paid eval projects.

RemoExperts

Credentialed contributors

Expert AI-training contracts for degreed professionals: STEM, coding, CAD, medicine, law, finance.

Rise Data Labs

Contract AI training specialists

An AI-data company recruiting remote contract AI trainers in languages, code, science, law, healthcare and business, mostly $15 to $50 an hour.

rustLabs

Expert RL-data network

Vetted expert network building RL environments, evals, and agent traces, paid hourly.

Scale AI Human Frontier Collective

Six-month expert fellowships (1099 contract)

Scale AI's fellowship for doctors, lawyers, finance, STEM, ML and software experts: remote six-month contracts, research advisors at $300/hr.

Snorkel AI Expert Community

Expert data community

Vetted expert community building specialist datasets and evaluations.

Sovrano AI

Expert AI evaluation (Europe)

A Barcelona expert-evaluation platform: expert AI trainer roles at $40-125/hr, expert waitlists up to €100-180/hr by field, domain audits and legal case studies.

SuperAnnotate (SME)

Managed expert network

Vetted expert network with a data-trainer career ladder.

Surge AI

Selective expert network

Premium RLHF and expert data for frontier labs, by selective application.

Terac

Verified-expert marketplace

Browse live AI-training and paid-study listings, each with pay shown upfront.

Trellis

Legal data and AI company paying attorneys hourly to classify court documents

Legal data and AI startup paying US attorneys $20 to $30 an hour, remote and on contract, to review court documents and classify verdicts for its AI.

Turing

Coding-centric data

Coding-and-reasoning data for frontier labs, heavy vetting.

Vals AI

AI benchmark company hiring physicians on contract

Independent AI benchmark company paying physicians and developmental experts $100 to $150 an hour on contract to build a child-safety benchmark.

Vetto

Expert AI review, paid per approved task

A Brazilian-founded expert network that pays professionals per approved task to review and write AI training data.

Volga Partners

AI data company with an on-call expert pool

An AI data company that hires on-call subject-matter experts and language reviewers for AI evaluation projects; US expert roles pay $35 to $60 an hour, healthcare students and trainees $15 to $35 (its postings, 27 Oct 2026).

Weekday

Recruiter for AI labs' expert projects

A recruiting company that staffs AI labs' expert training projects, most of them US contracts paying $60 to $160 an hour.

Welo Data

Vetted expert community

Welocalize's AI-data community: annotation, evaluation, red-teaming, and multilingual work.

xAI (SpaceXAI)

Frontier lab, in-house tutors

Grok's own tutor program: hourly work straight from the lab, no marketplace in between.

Amazon Mechanical Turk

Microtask crowd (HITs)

The original microtask crowd: earn per HIT at requester-set rates.

Sapien

Crypto data-labeling crowd

Crypto data-labeling crowd that closed its paid task app in March 2026 for expert validation (Proof of Quality).

Stellar AI

Project-based trainer pool

Project-based AI training platform (prompts, coding challenges, evals) that is closing: it wound down its annotation work in October 2026.

Appen

Global crowd (speech/localization)

A large global contributor crowd, strong on multilingual speech and evaluation.

Babel Audio

Voice data for AI (conversation, voice acting, transcription)

Get paid to train AI with your voice: recorded conversations, voice acting and transcription.

Clickworker

Microtask crowd (+ UHRS)

Global microtask crowd for AI data, and a gateway to Microsoft's UHRS work.

DATAmundi

Multilingual data pool

Summa Linguae's successor: multilingual annotation, voice, translation, and eval via DATAtalent.

DiagnosUs

Gamified labeling contests

Centaur Labs' app where clinicians compete in medical-labeling accuracy contests for cash.

Hive Micro

Microtask crowd

Long-running microtask crowd paying per task via PayPal or Bitcoin, closed to sign-ups from the US, UK, Canada and the EU.

iMerit

Enterprise annotation + Scholars

Enterprise annotation ops plus an expert 'Scholars' network.

Innodata

Data engineering company hiring flexible-hours AI associates

A listed AI-data company hiring US remote AI associates and evaluators on flexible hours, from $15/hr up to $75/hr for specialists.

Neevo

Speech & annotation crowd

Defined.ai's crowd community for speech, transcription, and annotation.

OneForma

Global microtask crowd

Centific's global microtask crowd: annotation, judging, transcription, and translation.

Pila8

Paid voice recording tasks

Paid voice recording, conversation and audio-labeling tasks for AI, run by YC startup BeSimple AI.

PublicAI

Web3 data crowd

Web3 data network paying in stablecoin, points and tokens, now mainly for developers' AI coding sessions (Trajector).

Remotasks

Entry-level annotation (Scale AI)

The mass-market entry point: visual and multimodal annotation.

RWS TrainAI Community

Open rater community

RWS's community of raters, annotators, and linguists across hundreds of language variants.

Sahara AI

Web3 data-labeling

Decentralized data-labeling and evaluation paying crypto per task, open worldwide.

Sama

Salaried delivery centers

Salaried annotation employees in East Africa and India.

Shaip (Collaborate by Shaip)

Global contributor community

Shaip's contributor community for data collection, annotation, and evaluation, paid weekly.

Sigma AI

Multilingual language data

Language data at scale: transcription, translation, linguistic annotation.

TELUS Digital AI

Enterprise rater community

Mature rater community: search, maps, and AI evaluation.

Toloka

Microtask crowd + experts

A microtask crowd with a high-end expert-data layer on top.

TransPerfect DataForce

Microtask + project crowd

A global crowd labeling, recording, and rating AI data in hundreds of languages.

Twine AI

AI data-collector marketplace

UK marketplace where 'AI collectors' record speech, image, and video in many languages.

Uber AI Solutions

Global gig data network

Uber's gig network doing AI data tasks: label, evaluate, translate, record.

Wirestock

Creator data marketplace

Creators get paid per approved asset on AI-data projects and earn a share each time their work is licensed.

CleverX

Expert network (set your rate)

Set your own rate: expert surveys, calls, and AI feedback.

dscout

Mobile UX research panel

Get paid as a 'scout' for mobile diary studies, missions, and live interviews.

Prolific

Study pool + AI trainers

Vetted study platform that spans easy studies and paid AI-trainer roles.

Respondent

B2B study panel + AI eval

Professional-skewed study panel where interviews pay well above consumer rates.

User Interviews

Research-studies marketplace

Get paid for UX studies, interviews, and surveys for real companies.