Platform Overview
Hire, manage, and pay top AI Trainers & Data Labelers in one place while working in the tools you already use
Find Data Labeling Vendors
Browse vetted agencies and BPOs for large-scale projects.
List your data labeling company
Create a free company profile, receive matched RFPs, and submit proposals with your pricing, capacity, and timeline.
JOIN AS Freelancer
The #1 Platform for Finding AI Training Jobs
We bring AI training and data labeling jobs from 20+ platforms into one place.
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
JOIN AS Freelancer
The #1 Platform for Finding AI Training Jobs
We bring AI training and data labeling jobs from 20+ platforms into one place.
LLM & Agents
View All LLM & Agent Solutions
Structured Data Labeling
View Data Labeling Solutions
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
Solutions / Data Labeling
Hire Experts for Structured Data Labeling
Post a job and get a curated shortlist from 100,000+ pre-vetted annotators for any structured data labeling workflow. Hire directly into your tools, or request a managed program for large projects.
Document Annotation
Entity extraction, table labeling, grounded Q&A, and more
Image Annotation
Bounding boxes, polygons, keypoints, classification, attributes, and more
Segmentation
Pixel-level semantic, instance, and panoptic masks and more
Video Annotation
Object tracking, temporal labeling, action recognition, QA, and more
Text Annotation
Text labeling for NLP and content tasks across 70+ languages
Speech and Audio Labeling
Transcription, diarization, and audio event labeling for any use case
Time Series Annotation
Event and anomaly labeling for sensor data across any industry
Point Cloud Annotation
3D cuboids, segmentation, tracking, sensor fusion, and more
Medical Imaging Annotation
Segmentation and labels for CT, MRI, pathology, and other modalities
Satellite Imagery Annotation
Mapping-grade labels for geospatial AI and Earth observation applications
Talent Network 
Find the Human Data Experts You Need for Structured Labeling
OpenTrain connects you with pre-vetted annotators and reviewers for any structured data labeling workflow. Post a job, get a curated shortlist, and hire directly into your tools.
100,000+ pre-vetted experts across 130 countries and 70+ languages
AI matching with screening and interviews tailored to your data labeling project
Deep domain coverage: technical, scientific, medical, legal, safety, and creative
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
Get Started
Start Hiring from the #1 AI Training Network
Create your account and reach 100,000+ pre-vetted annotators for any structured data labeling workflow. Review your shortlist, hire into your tools, and pay with simple, transparent fees.
Process
How OpenTrain Works
Post a job, hire pre-vetted annotators, and start data labeling work in days.
01
Post Your Job. Get Qualified Candidates.
Describe your data labeling project and requirements. Our AI matches you with annotators from the network, then screens resumes, tests skills, and runs interviews. You get a shortlist of qualified candidates ready to hire.
02
Hire and Integrate Into Your Tools
Hire directly and invite your team into any annotation platform, labeling tool, or custom environment. You keep full control over setup and workflow.
03
Manage Work and Pay in One Place
Use one workspace for messaging, instructions, training materials, progress tracking, and secure payouts. Production moves faster when everything is in one place.
Post Your Data Labeling Job Now
Create an account, post your role, and get matched with qualified annotators from 100,000+ experts. Hire directly into your tools.
Post a Data Labeling Job Large Project? Try Managed Service
For large or complex work, we recruit, onboard, manage, and QA a dedicated team inside your tools.
Managed Service 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.
Managed Service
For Large ProjectsDone-for-You
We recruit, onboard, and manage a dedicated team inside your tools. End-to-end operations for large or complex projects.
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.