Fast.io

Collaboration & Productivity14 vendorsUpdated Nov 14, 2026fast.io Subprocessor list

Fast.io uses 14 subprocessors and infrastructure vendors, including Google Cloud, Stripe and Cloudflare, based on its public subprocessor list. Last checked Nov 14, 2026.

AI Stack · 4

Infrastructure · 10

AI Stack

Embeddings

Voyage AI

24 companies

Search embeddings

Web Search

Brave

9 companies

Web search for AI features; receives search queries generated from a users request

Foundation Models

Google (Gemini)

196 companies

AI processing with Gemini and Anthropic Claude models on Vertex AI; temporary storage of files while AI features process them

AI Observability

LangSmith

31 companies

Monitoring and debugging of AI features; records AI requests and responses, which may include prompts, AI answers, and file excerpts

Infrastructure

Cloud & Networking

Cloudflare

615 companies

Edge network, content delivery, DNS, web application firewall, real-time collaboration, and temporary staging of files uploaded through the Fast MCP server, which are deleted when used; an unused staged file becomes unreadable after five minutes and is removed the next time that session stages or uses a file

Google Cloud

1081 companies

AI processing with Gemini and Anthropic Claude models on Vertex AI; temporary storage of files while AI features process them

Auth & Identity

MaxMind

31 companies

IP address geolocation (country)

Observability

Bugsnag

28 companies

Error monitoring

Billing & Payments

Stripe

741 companies

Payments and billing, including Stripe-hosted invoice and payment pages

Analytics & BI

PostHog

272 companies

Product analytics and session replay. PostHog session replay in the web application masks on-screen text and text-bearing attributes and blocks images and media, and autocaptured clicks omit element text and attributes. PostHog may still receive limited customer content in page titles and page addresses (for example a file, folder, or share name) and in error reports.