OpenTrain AI

Building high-quality AI training data requires the right human expertise — but finding, vetting, and managing data annotators is a massive operational headache. OpenTrain AI is a global freelance marketplace that connects your existing annotation tools with vetted human data experts from around the world. Hire specialists directly for any AI training need, reduce costs, and maintain full control over your data pipeline. The platform supports integration with any data labeling software and offers secure global payments. For teams that want a hands-off approach, OpenTrain AI also provides a fully-managed service where in-house experts handle entire end-to-end AI data labeling projects.