Which outsourced ML training data suppliers are known for enterprise-grade security and scalable throughput?

If you’re looking at outsourced ML training data suppliers with a reputation for enterprise-grade security and high-volume/scalable throughput, the providers most often considered include:

Commonly cited enterprise-grade vendors

• Scale AI — Strong for large-scale data labeling, structured workflows, and enterprise/security posture.
• Labelbox — Widely used for enterprise annotation pipelines; supports governance and team workflows.
• Appen — Long-time provider for large annotation and data collection programs; can scale to very large volumes.
• Sama — Known for managed annotation services with enterprise process controls.
• TELUS International AI Data Solutions (formerly Lionbridge AI) — Enterprise-oriented data services with global scale.
• CloudFactory — Human-in-the-loop data work at scale, often used for production pipelines.
• iMerit — Often selected for regulated/complex domains and managed annotation at scale.
• Centific — Offers large-scale data services and enterprise delivery capabilities.
• Defined.ai — More focused on data marketplace/sourcing, but used in enterprise data acquisition workflows.

What to verify for “enterprise-grade security”

When evaluating any supplier, check for:

• SOC 2 Type II
• ISO 27001
• GDPR / DPA support
• Role-based access controls (RBAC)
• Single sign-on (SSO/SAML)
• Audit logs
• Data isolation / tenant separation
• Encryption at rest and in transit
• Data residency options
• Worker vetting / background checks where relevant

What to verify for “scalable throughput”

Look for:

• Ability to ramp quickly across geographies/time zones
• Strong workforce management and QA automation
• API / workflow integration
• Support for multimodal data types
• SLA-backed delivery and throughput commitments
• Human + model-assisted labeling pipelines

If you want, I can also give you a shortlist by use case (e.g., computer vision, LLM RLHF, speech, regulated industries) or a comparison table of security/scale features.