Text and NLP Annotation Services on the #1 AI Training Network
Outsource text and NLP annotation services to a tool-neutral network of 100,000+ vetted Data Labelers across 70+ languages. Post a job and hire directly for classification, NER, sentiment analysis, and content moderation — in healthcare, finance, legal, and other domains. Self-serve or managed.
Why Top AI Teams Choose OpenTrain for Text Annotation
Annotators to QA Leads
Annotators, moderators, and QA reviewers for any project
Use Any Tool
Work inside any labeling platform or internal environment
Any Domain or Language
Healthcare, finance, legal, and more across 70+ languages
Hire for Any Text Labeling Platform or Internal Tool
Have your own tooling? Our talent works directly in your platform.
Pre-Vetted Experts
Countries
Languages
How OpenTrain Works for Text Annotation
Post a Text Annotation Job & Receive Pre-Vetted Applicants
Describe your project and the skills you need. Receive proposals from text annotators, content moderators, and QA reviewers with proven experience in your domain.
Hire and Add to Any Labeling Platform
Review candidates, make your hires, and invite them to any annotation tool or your internal environment.
Communicate and Pay in One Place
Share guidelines and taxonomies, message your team, and handle global payments from a single dashboard.
Start Building Your Text Annotation Team Today
Post your first job and connect with text annotators, content moderators, and QA reviewers who work inside any labeling platform or your own internal environment.
Post Your Text Annotation Job
Describe your requirements and receive a curated shortlist of domain experts matched to your project. 15% flat fee, no hidden markups.
Full-Service, End-to-End
- Recruiting & live vetting
- Onboarding & training
- Daily management & QA
- Dedicated program lead
Build a career training the world's top AI models.
Freelance AI Trainer?
Join 191,000+ freelancers
Data Labeling Company?
Find clients and recruit talent
Consistent Labels Across Millions of Documents
NER drift and taxonomy inconsistency kill model performance at scale. Our text annotators maintain 95% inter-annotator agreement across large batches — because they're trained on your taxonomy before they start.
FAQs about Hiring for Text Annotation
Quick answers to common questions about text annotation projects and Data Labeler hiring on OpenTrain.