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Plain Tech Stack

AI-native customer support platform with developer-first API

Software Development London 11–50 employees Founded 2020 Privately Held

Plain is a customer support platform built around AI-first architecture and a public API. The tech stack reveals heavy investment in AI infrastructure (Claude, Anthropic, OpenAI, RAG) paired with backend systems (PostgreSQL, n8n) designed for reliability and scale. Hiring is engineering-skewed (43 of 64 roles) with acute focus on AI data pipelines, backend architecture, and infrastructure — a pattern that maps directly to their stated pain around AI accuracy and system scalability.

Tech Stack 19 technologies

Core StackSlack Vercel Figma Ashby OpenAI Anthropic RAG PostgreSQL n8n Discord PostHog Linear Claude Justworks OpenAI API Google Analytics 4 Google Search Console Screaming Frog Twitter
AdoptingVercel PostHog Linear

What Plain Is Building

Challenges

  • Slow manual disconnected support
  • Ai accuracy reliability quality
  • System scalability challenges
  • Lack of unified customer interactions
  • Ai transforming customer support
  • Seismic shift in b2b customer support
  • Reactive support
  • Siloed support across channels
  • Siloed support function
  • Scaling ai features quickly

Active Projects

  • Backend services for ai integrations
  • Backend architecture design
  • Ai data pipeline
  • Developer infra tooling
  • Ai agents assistants insights
  • Ai infrastructure architecture and pipelines
  • Ai feature infrastructure
  • Ai features development
  • Building gtm team in sf
  • Generative engine optimization content

Hiring Activity

Accelerating65 roles · 55 in 30d

Department

Engineering
43
Product
9
Marketing
5
Sales
3
HR
2
Design
1

Seniority

Senior
48
Mid
15
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About Plain

Plain provides an AI-native customer support platform targeting engineering and operations teams at mid-market SaaS companies. The product surfaces support interactions across multiple channels (Slack, Discord) through a unified interface, backed by a public API for programmatic access and customization. The company is UK-based, founded in 2020, and currently scaling rapidly — the active hiring mix skews heavily toward backend and infrastructure engineering, with emerging go-to-market activity in the US.

HeadquartersLondon
Company Size11–50 employees
Founded2020
Hiring MarketsUnited States, United Kingdom, Italy, Bulgaria, Netherlands, Poland, Germany, Romania

Frequently Asked Questions

What is Plain's tech stack?

Plain uses Claude and OpenAI for AI models, PostgreSQL for data persistence, PostHog for analytics, Vercel for deployment, and n8n for workflow automation. They're actively adopting PostHog, Linear, and Vercel.

Where is Plain hiring?

Plain is recruiting across United States, United Kingdom, Italy, Bulgaria, Netherlands, Poland, Germany, Romania, Ireland, Denmark, France, Portugal, Estonia, Belgium, Hungary, and Sweden.

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