Every modern AI model — from chatbots to self-driving systems — is built on the same hidden foundation: carefully labeled, human-reviewed training data. The quality of that data sets the ceiling on what the model can do.
But getting it has historically been painful. Companies cobble together spreadsheets, contractors, and brittle internal tools. Trainers — the people doing the actual labeling, transcribing, and rating — get poor pay, no platform, and no career growth.
We built trAIn to fix both sides at once.
What trAIn does
trAIn is a two-sided marketplace for AI training data:
- Companies post tasks (image labeling, audio transcription, RLHF response rating, sentiment analysis, and 7 more types) with quality requirements and budgets.
- Trainers browse those tasks, complete them at their own pace, and get paid via Stripe Connect — anywhere in the world.
We handle the messy middle: matching, quality control, certifications, payouts, dispute resolution, and analytics.
Why now
Three things changed in the last 18 months:
- RLHF became the default. Reinforcement learning from human feedback — humans rating AI responses — is now how every frontier model is fine-tuned.
- Multimodal data exploded. Models need image + text + audio + video at huge scale, far beyond what in-house teams can label.
- Quality matters more than volume. A small batch of expert-labeled data now beats a massive batch of cheap labels.
trAIn is built for that world.
What's next
We're rolling out:
- Domain certifications for medical, legal, and financial labeling
- Team workspaces so companies can collaborate on campaigns
- Live submission preview for clients reviewing trainer work
- Earnings dashboards so trainers can track and forecast income
If you want to be part of it, join as a trainer or post your first task. Welcome to trAIn.