/ 60,000+ Vetted AI Data Experts

The #1 Talent Network for AI Training & Data Labeling

Hire pre-vetted domain experts at scale for LLM evaluation, RLHF, red teaming, data labeling, and more. Post a job, get a curated shortlist, and bring talent into any platform you use, on your terms.
Post a Job Join as Freelancer
Trustpilot
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/ QUALITY & VETTING

Where Top AI Teams Find Top AI Trainers

Global Network
60,000+ vetted experts across 130 countries and 70+ languages, including hard-to-find specialties.
Domain Specialists
PhD-level and industry experts across technical, scientific, medical, legal, creative, and more.
AI Matching and Screening
Every applicant is AI matched to your spec, resume-checked, and interviewed before you review.
Project-Specific Skill Tests
Candidates complete task tests graded to your rubrics so shortlists are proven on your work.
Exact-Fit Shortlists
Post once and receive a curated list of specialists aligned to your domain, language, and tool stack.

Better Talent. Better Data. Better Models.

Post a Job Get a Managed Service Quote
/ All-In-One

One Platform to Find, Hire, and Pay AI Training Talent

Source vetted talent, manage projects, and handle payments in one workspace. Keep your preferred tools and workflows.
Post a Job Join as Freelancer

Post a Job Once, Get Pre-Vetted Matches Fast

Post once and receive a vetted shortlist of domain experts. Our AI screens resumes, runs skills tests, and conducts live interviews so you review only qualified candidates.
How It Works
OpenTrain shortlist showing matched AI trainers and data labelers with PhD and STEM credentials

Use Any Data Labeling Tool

Keep your stack and workflows. Invite AI Trainers and Data Labelers into your existing annotation software or custom tool with full control.
See Integrations
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Communication and Project Hub

Centralize chat, announcements, and documents. Share and update instructions, assign training modules, and keep projects organized in one workspace.
How It Works
OpenTrain project hub with shared instructions and team chat

Global Payments & Transparent Pricing

Pay talent securely in the platform with a simple flat fee. No bundled software markups and predictable costs as you scale.
View Pricing
OpenTrain payment interface showing hourly rates and Stripe integration
/ Talent Network

Find the Human Data Experts You Need to Build the Best AI

OpenTrain is where AI teams find specialized human data experts. Our AI matching and interviews surface exact-fit specialists for any project, fast.
60,000+ pre-vetted experts spanning 130 countries and 70+ languages
AI matching with resume screening and live interviews tailored to your project
Domain expertise across any field, including technical, scientific, creative, and more
Post a Job Join as Freelancer
Talent search platform for STEM AI trainers OpenTrain integrates with any data labeling tool Abstract globe-brain sphere
/ Process

How OpenTrain Works

Create your account, post a job, and let our AI do the heavy lifting so you can focus on better models.
/ 01
Post a Job & Reach Pre-Vetted Experts
Post your role and requirements. Our AI screens resumes, tests skills, and runs interviews so you review a shortlist of exact-fit domain experts.
/ 02
Hire and Integrate Into Your Data Labeling Tools
Easily hire and invite your team into any data labeling platform or your own environment while keeping full control over setup and workflow.
/ 03
Manage Work and Pay in One Place
Use one workspace for chat, instructions, training modules, progress tracking, and secure payouts so production moves faster and teams stay aligned.

Post Your AI Data Job Now

Create an account, post your role, and get a curated shortlist from 60,000+ experts to hire fast in your tools.
Post a Job

Large Project? Explore Our Managed Service

For large or complex work, we recruit, onboard, manage, and QA a dedicated team inside your tools.
Managed Service
Better data quality
*
Flexible tooling
Transparent Pricing
*
Simplify AI Data Ops
Better data quality
*
Flexible tooling
Transparent Pricing
*
Simplify AI Data Ops
/ AI Data Talent Layer

Find the Best AI Trainers.
Build the Best AI Models.

Post a job and get a curated shortlist of vetted AI Trainers and Data Labelers within 24 hours. Hire them into any annotation tool. No commitment required.
Post a Job Large Project? → Managed Service
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/ Solutions

Find Talent For Any AI Data Need

LLM & Agents
Find vetted domain experts to train and evaluate your LLMs, driving higher quality and more reliable model behavior.
LLM Evaluation Red Teaming Hallucination Audits RLHF & Preference Data Supervised Fine-Tuning Code Generation Review Function Calling Computer Use Agent Training Reasoning Step Verification Multilingual AI Training Reasoning Problem Creation Agent Simulations RL Environment Design
View All LLM & Agent Solutions
Structured Data Labeling
Hire experienced annotators to deliver precise, consistent labels at scale across vision, text, audio, and 3D.
Document Annotation Image Annotation Segmentation Video Annotation Text Annotation Speech and Audio Labeling Time Series Annotation Point Cloud Annotation Medical Imaging Annotation Satellite Imagery Annotation
View All Data Labeling Solutions
/ INTEGRATIONS

Hire Experts For Any Data Labeling Tool

Hire from the #1 network for AI Trainers and Data Labelers. Post a job and bring pre-vetted experts into any tool you use.
Your Custom Tool
Custom
Label Studio
Multimodal
Roboflow
Vision
AWS SageMaker
Multimodal
CVAT
Vision
Scale Studio
Multimodal
SuperAnnotate
Multimodal
Encord
Vision
Dataloop
Multimodal
Kili Technology
Multimodal
Supervisely
Vision
V7 Darwin
Vision
Datature
Vision
Snorkel AI
Programmatic
Argilla
Text
Datasaur
Text
Prodigy
Programmatic
/ FAQ

Simple Answers to Common Questions.

What OpenTrain is, how vetting works, pricing and payments, tool compatibility, self service vs managed, and how freelancers join.

OpenTrain is a talent network and platform. You use it to find, hire, and manage AI trainers and annotators at scale. Work happens inside the tools you choose. You can run projects yourself or have our team manage them end to end.

Vetting is project specific. When you post a role, applicants go through AI resume screening, skills tests, and a live AI interview tailored to your requirements. You receive a curated shortlist of exact-fit candidates. For managed programs we can add paid task tests and deeper calibration.

You pay talent directly at transparent rates with a simple flat platform fee. Choose hourly, task based, or milestone based payments. Funds are handled securely and payouts are supported globally. No bundled software markups and no long commitments.

Yes. Invite hires into any annotation software or your custom environment. You keep full control over permissions, workflow, and QA policies. There is no tool migration or lock in.

Self Service: Post a job, review a curated shortlist, hire and manage talent directly in your tools. Managed Service: We recruit, onboard, schedule, train, and manage the team with quality assurance, operating inside your tools with a single point of contact.

Create an account and complete your profile. Apply to projects that match your skills and languages. For each project you will complete screening steps and a live AI interview. Approved work is paid through OpenTrain with secure global payouts.

/ GET STARTED

Join the #1 Platform for AI Training Talent

Where top AI builders and expert AI Trainers connect to build the future of AI.
Self-Service
Post a Job
Post your project and get a shortlist of qualified AI Trainers and Data Labelers. Hire and manage your team in the tools you already use.
Create Account & Post a Job
Managed Service
For Large Projects
Done-for-You
We recruit, onboard, and manage a dedicated team inside your tools. End-to-end operations for large or complex projects.
Learn About Managed Service
For Freelancers
Join as an AI Trainer
Find AI training and data labeling projects across platforms, all in one place. One profile, one application process, more opportunities.
Join Now