Who Sells Data 159 vendors · updated Oct 13, 2026Talk to the founder

OpenTrain AI

OpenTrain connects AI labs and developers with vetted human experts for RLHF, model evaluation, red teaming, and data annotation. Customers hire directly or use a managed team working in their existing tools.

Source:opentrain.ai· Sep 29, 2026

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Headquarters
Seattle, United States

Source:platform.tracxn.com· Sep 29, 2026

Founded
2022

Source:linkedin.com· Sep 29, 2026

Headcount
1-10

Source:linkedin.com· Sep 29, 2026

Total funding
Not publicly listed
Latest round
Not publicly listed

Trust & data

How the vendor protects buyer material, where its data comes from, and where it can run.

SOC 2
Pending

Source:app.opentrain.ai· Sep 29, 2026

Quote
SOC 2 Type II In progress
Trust center

Source:app.opentrain.ai· Sep 29, 2026

Other certifications
HIPAA-readyGDPR/CCPA supported

Source:opentrain.ai· Sep 29, 2026

Data sources
Built from customer dataExpert or contractor-created

Source:opentrain.ai· Sep 29, 2026

Quotes
  • Built from customer data: If you need people to label your data, annotate your datasets, or train your models, you post a job.
  • Expert or contractor-created: If you need people to label your data, annotate your datasets, or train your models, you post a job.
Stated confidentiality practices
OpenTrain states it uses TLS 1.2+ and AES-256 encryption, role-based access and SSO/MFA, quarterly access reviews, and task-limited annotator access. It says customer data is not used to train third-party foundation models and offers verifiable deletion controls; customers can use their existing annotation tools.
Not publicly listed
Deployment, Exclusivity

What they sell

Domains

Source:opentrain.ai· Sep 29, 2026

Delivery formats
APIManaged service
Not publicly listed
Public samples & benchmarks, Named customers

Every change to these facts is kept in the public claims log. Record co_a9399de0e745.