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.
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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.
Data Labeling Solutions / Document Annotation
Hire Expert AI Trainers for Document Annotation
Post a job and connect with domain experts who can create evidence-grounded Q&A, verify citations, and extract structured data from complex documents. Our network includes 100,000+ AI training specialists.
One place to find AI Trainers with the domain expertise and document skills your project requires.
Vetted Annotators
Pre-screened for education, domain experience, and accuracy
Any Tool
Work in your annotation platform, document pipeline, or custom tooling
Domain Expertise
Real experience in finance, legal, healthcare, insurance, and more
All-In-One
One Place to Hire and Manage Your Document Annotation Team
Everything you need to build a team that annotates training data, validates model outputs, and handles the complex documents your AI needs to understand.
The #1 Talent Network for Document Annotation
AI Trainers across every domain, document type, and language. Pre-vetted and ready for your projects.
Post a Document Annotation Job
Work Happens in Your Tools
AI Trainers operate inside your annotation platform, document pipeline, or custom tooling. You control access. Your data stays where it is.
Post a Document Annotation Job
Communicate and Manage Work
Share annotation guidelines and message your team with built-in tools. No need for separate docs or chat apps.
Post a Document Annotation Job
Secure Global Payments and Transparent Pricing
Pay Data Labelers in any country from a single dashboard. You set the rates, we add a small fixed fee on top. No hidden costs, no chasing invoices.
Post a Document Annotation Job
Why OpenTrain 
Scale Document Annotation With a Global Network of AI Trainers
Every candidate is vetted for domain knowledge and annotation accuracy. You get a shortlist of qualified AI Trainers ready to start working in your tools. Hire for:
Entity extraction from contracts, filings, statements, and reports
Table annotation with structure, hierarchy, and cell-level labels
Q&A pair generation for document AI training and evaluation
Human-in-the-loop review of model outputs and low-confidence fields
Domain-specific work in finance, legal, healthcare, insurance, and more
How It Works
How OpenTrain Works for Document Annotation
Post a job, hire qualified AI Trainers, and manage everything from one platform. Your documents and tools stay exactly where they are.
01
Post a Job and Receive Pre-Vetted Proposals
Describe your document types, annotation schema, and domain requirements. Receive proposals from AI Trainers who have already been screened for relevant expertise.
02
Hire and Add to Your Tools
Review candidates, make your hires, and invite them to your annotation platform or document pipeline.
03
Communicate and Pay in One Place
Share guidelines, message your team, and handle global payments from a single dashboard.
Post Your Document Annotation Job Now
Create an account and post your first job in minutes.
Post a Document Annotation Job Large Project? We Can Help.
Get a dedicated team managed end-to-end for large or ongoing document annotation projects.
Get a Managed Service Quote Get Started
Start Building Your Document Annotation Team Today
Post your first job and connect with pre-vetted AI Trainers who have the domain expertise your project requires.
Metrics
Where Top AI Teams Scale Document Training Data
Pre-vetted AI Trainers across dozens of professional domains, ready to annotate the documents your models need to understand.
100K+
pre-vetted AI training specialists
50+
professional domains and document types
24 hrs
avg. time from job post to production start
Resources
Related Articles
Guides and insights for document annotation
FAQ
FAQs About Hiring for Document Annotation
Common questions about hiring AI Trainers to annotate documents for AI training and evaluation.
Every AI Trainer is screened for annotation accuracy, attention to detail, and ability to follow complex guidelines. We assess their familiarity with document types, annotation schemas, and industry terminology. For specialized projects, you can request candidates with specific domain backgrounds in finance, legal, healthcare, insurance, or other fields.
You can hire AI Trainers for entity extraction, table annotation, Q&A pair generation, citation verification, clause identification, human-in-the-loop review of model outputs, and more. Most teams hire for a mix of these depending on their training pipeline.
Our network covers a wide range of document types, including contracts, SEC filings, financial statements, insurance claims, medical records, invoices, regulatory filings, and more. Trainers have real-world experience with the documents and terminology your models need to understand.
AI Trainers can work in any annotation platform or document pipeline you provide access to. This includes Label Studio, Labelbox, Argilla, Datasaur, or your own custom tooling. OpenTrain is tool-agnostic, so your setup stays exactly where it is.
It's free to post jobs and get started. We only charge a flat platform fee on top of the payments you send to the AI Trainers you hire. You set your own rates and hire directly. For detailed pricing, visit our pricing page.
Managed Service is for teams with large or ongoing document annotation projects who want end-to-end support. We recruit, onboard, and manage a dedicated team inside your tools, handling operations so you can focus on your models.
Integrations
Hire for Any Document Annotation Tool
Hire AI Trainers on OpenTrain, then invite them to any third-party platform or your own custom tooling.
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.