Plain

Customer Experience29 vendorsUpdated Nov 10, 20265 added, 8 removed plain.com Subprocessor list

Plain uses 29 subprocessors and infrastructure vendors, including AWS, Google Cloud and OpenAI, based on its public subprocessor list. Last checked Nov 10, 2026.

AI Stack · 5

Infrastructure · 24

AI Stack

Vector Databases

Turbopuffer

55 companies

Database & Hosting: EU

Model Serving

Baseten

81 companies

Engineering

Foundation Models

Anthropic

669 companies

AI/LLM Provider: AI/LLM Provider

AI: AI/LLM Provider

LLM which reads codebase and helps engineering team to understand existing code and for development. Engineering

Infrastructure

Cloud & Networking

AWS

1307 companies

Cloud provider: Hosting/Infrastructure

Cloudflare

615 companies

Cloud monitoring: Hosting/Infrastructrure, Firewall && DDoS protection

Google Cloud

1081 companies

Cloud provider: Hosting / Infrastructure

Render

30 companies

Cloud provider: Infrastructure / Hosting

Vercel

233 companies

Hosting: Hosting/Infrastructure

Auth & Identity

WorkOS

125 companies

Authentication: Authentication

Databases

Supabase

73 companies

Use as our GTM data infrastructure. Stores call recording analysis, customer data, and enrichment data to run out GTM intent engine. It receives signals from RB2B, LinkedIn Ads, and Attio to provide a fit and intent score used by Cargo (through Polytomic/Plain). Cloud provider