Promptfoo

Data & ML Infrastructure8 vendorsUpdated Nov 10, 20261 removed promptfoo.dev Subprocessor list

Promptfoo uses 8 subprocessors and infrastructure vendors, including Google Cloud, OpenAI and Cloudflare, based on its public subprocessor list. Last checked Nov 10, 2026.

AI Stack · 1

Infrastructure · 7

AI Stack

Foundation Models

OpenAI

823 companies

United States: Application AI functionality

View their stack →

Infrastructure

Cloud & Networking

Azure

595 companies

United States: AI services and inference

Cloudflare

615 companies

US: CDN and DDoS Protection

Google Cloud

1081 companies

Cloud provider: Cloud hosted infrastructure, AI inference and AI services

Auth & Identity

FusionAuth

5 companies

Identity provider: Provides enterprise SSO authentication to customers

Observability

Sentry

518 companies

United States: Application performance monitoring and error tracking

Analytics & BI

PostHog

272 companies

Data analytics: Aggregated product analytics

Developer Platform

GitHub

207 companies

Version control: Version control for software management

Model labs reached through vendors 2

Promptfoo does not list these model providers. Vendors on its list name them on their own subprocessor lists.

AnthropicthroughCloudflare,Sentry,PostHog
SpaceXAIthroughCloudflare

Changes

Mar 13, 2026 to Nov 10, 2026Source

Removed 1

Vanta

Earlier lists

Mar 13, 20269 vendors

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