Solutions

The Talent Network for Every AI Training Workflow

Post a job and get a curated shortlist from 100,000+ pre-vetted specialists for LLM training, agent evaluation, and data labeling. Hire directly into your tools, or request a managed program for large projects.

LLM & Agents

LLM Evaluation

Golden datasets, pairwise ranking, rubric scoring, judge validation, and more

Data Labeling

Document Annotation

Entity extraction, table labeling, grounded Q&A, and more

Data Labeling

Image Annotation

Bounding boxes, polygons, keypoints, classification, attributes, and more

LLM & Agents

Red Teaming

Jailbreaks, prompt injection, policy bypass, data leakage, and more

Data Labeling

Segmentation

Pixel-level semantic, instance, and panoptic masks and more

LLM & Agents

Hallucination Audits

Claim verification, citation checking, severity scoring, and more

LLM & Agents

RLHF & Preference Data

Pairwise ranking, multi-criteria scoring, rewrites, failure tagging, and more

Data Labeling

Video Annotation

Object tracking, temporal labeling, action recognition, QA, and more

LLM & Agents

Supervised Fine-Tuning

Instruction data creation, domain verification, synthetic data QA, and more

Data Labeling

Text Annotation

Text labeling for NLP and content tasks across 70+ languages

LLM & Agents

Code Generation Review

Verification, RLHF ranking, bug detection, security review, and more

Data Labeling

Speech and Audio Labeling

Transcription, diarization, and audio event labeling for any use case

LLM & Agents

Function Calling

Tool selection, argument annotation, multi-step traces, error recovery, and more

Data Labeling

Time Series Annotation

Event and anomaly labeling for sensor data across any industry

Data Labeling

Point Cloud Annotation

3D cuboids, segmentation, tracking, sensor fusion, and more

LLM & Agents

Computer Use Agent Training

Trajectory data and evaluation for browser and desktop agents

Data Labeling

Medical Imaging Annotation

Segmentation and labels for CT, MRI, pathology, and other modalities

LLM & Agents

Reasoning Step Verification

Step-level correctness labels for training process reward models

Data Labeling

Satellite Imagery Annotation

Mapping-grade labels for geospatial AI and Earth observation applications

LLM & Agents

Multilingual AI Training

Native-speaker RLHF, evaluation, prompt writing, and more across 100+ languages

LLM & Agents

Reasoning Problem Creation

Original problems with step-by-step solutions in math, code, and more

LLM & Agents

Agent Simulations

Scenario design, gold trajectories, rollout evaluation, failure tagging, and more

LLM & Agents

RL Environment Design

Reward functions, training scenarios, and environment QA for RL agents

Talent Network

The Experts Behind the Best AI Models

OpenTrain connects you with pre-vetted specialists for LLM training, agent evaluation, and structured data labeling. 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 project

Deep domain coverage: technical, scientific, medical, legal, safety, and creative

Post a Job Get a Managed Service Quote

OpenTrain workflow showing job posting to screening and vetting to curated shortlist of pre-vetted AI training experts.

Hire freelance AI Trainers and Data Labelers into any platform including Label Studio, Argilla, CVAT, Labelbox, V7, Roboflow, Datasaur, or your custom tool.

Abstract image of half-globe, half-brain sphere.

Get Started

Start Hiring from the #1 AI Training Network

Create your account and reach 100,000+ pre-vetted specialists. Review your shortlist, hire into your tools, and pay with simple, transparent fees.

Post a Job Get a Managed Service Quote

OpenTrain talent pipeline showing matched AI Trainers for LLM Science Evaluation and Image Segmentation jobs with Invite All Matches buttons.

Process

How OpenTrain Works

Post a job, hire pre-vetted specialists, and start working in days.

Post Your Job. Get Qualified Candidates.

Describe your project and requirements. Our AI matches you with specialists from the network, then screens resumes, tests skills, and runs interviews. You get a list of qualified candidates ready to hire.

Hire and Integrate Into Your Tools

Hire directly and invite your team into any labeling platform, evaluation tool, or your own environment. You keep full control over setup and workflow.

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 AI Data Job Now

Create an account, post your role, and get matched with qualified specialists from 100,000+ experts. Hire directly into your tools.

Post a 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

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.

FAQ

Frequently Asked Questions

Common questions from teams considering OpenTrain AI.

What's the difference between Self-Service and Managed Service?

Self-Service lets you post a job, review qualified candidates, and hire directly. You manage the team yourself and pay the talent's rate plus a 15% marketplace fee. Managed Service is for larger or complex projects where we recruit, onboard, manage, and QA a dedicated team for you. You pay a 20% management fee instead of the marketplace fee.

How is OpenTrain different from a traditional data labeling vendor?

OpenTrain is a talent network, not a BPO. You hire specialists directly and they work in your tools. There's no proprietary platform to migrate into, no per-task software fees, and no lock-in. You control the workflow, the data stays in your environment, and you own the relationship with your team.

Can I use my own labeling or evaluation tools?

Yes. Talent works directly in Label Studio, Labelbox, CVAT, V7, Argilla, or any tool you already use. For LLM and agent work, they connect to your evaluation harness, prompt hub, or code repo. No migrations required.

What does pricing look like?

Posting is free. Self-Service charges a 15% marketplace fee on approved payouts. Managed Service charges a 20% management fee. No hidden software markups, per-task fees, or minimums.

How fast can we start?

Most teams receive qualified candidates within days. Once you hire and grant tool access, work can begin immediately. Managed programs add a short kickoff to align on staffing, QA targets, and reporting.

Who owns IP and how is data handled?

You own all deliverables. Work happens in your tool accounts, not on OpenTrain servers. We never host your datasets. IP, NDAs, and access controls are handled directly between you and your hires.

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