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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.com LinkedIn

Plain builds an API-first customer support platform powered by AI, built on PostgreSQL, AWS Lambda, and models from OpenAI and Anthropic. The engineering-dominant hiring mix (49 of 54 roles) reflects the company's infrastructure-heavy roadmap: backend services for AI integrations, developer tooling, and internal AI APIs are active priorities. Pain points around AI accuracy, observability, and channel fragmentation signal they're solving real operational friction in multi-channel support workflows.

Tech Stack 25 technologies

Core StackFigma PostgreSQL Slack OpenAI Anthropic n8n Zapier Vercel Ashby RAG AWS AWS Lambda AWS RDS DynamoDB Discord Google Search Console PostHog Linear Justworks OpenAI API Google Analytics 4 Screaming Frog AWS Amplify EventBridge AWS SQS

What Plain Is Building

◆Challenges

  • Slow manual disconnected support
  • Reactive support
  • Unified customer interactions
  • Complex b2b support
  • Ai accuracy reliability
  • Ai observability
  • Siloed support across channels
  • Keeping up with growing pipeline
  • Building partnership playbooks
  • Scaling partnership pipeline

▲Active Projects

  • Backend services for ai integrations
  • Ai agents and assistants
  • Backend architecture improvement
  • Developer infra tooling
  • Customer-facing channel integration
  • Internal ai apis
  • Landing page and funnel experiments
  • Ship high impact features
  • Velocity segment
  • Building strategic partnership ecosystem

Hiring Activity

Accelerating60 roles · 40 in 30d

Department

Engineering
49
Marketing
3
Sales
3
Customer-Success
1
Design
1
Support
1

Seniority

Senior
43
Mid
14
Manager
1
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About Plain

Plain is a London-founded AI support platform designed for technical teams and mid-market B2B companies handling complex support workflows across multiple channels. The product combines a backend API with AI-native features to automate and accelerate customer interactions. The stack (PostgreSQL, AWS Lambda/RDS/SQS, OpenAI, Anthropic) reflects a systems-focused approach to scaling support operations. Founded in 2020, the company operates as a lean, engineering-led organization and is actively hiring across Europe and the US.

HeadquartersLondon
Company Size11–50 employees
Founded2020
Hiring MarketsUnited Kingdom, Poland, Netherlands, Bulgaria, Portugal, Ireland, Estonia, Romania

Frequently Asked Questions

What tech stack does Plain use?

PostgreSQL, AWS (Lambda, RDS, DynamoDB, SQS, EventBridge), OpenAI, Anthropic, n8n, Slack, Discord, PostHog, Linear, and Vercel for frontend.

What is Plain working on?

Backend services for AI integrations, AI agents and assistants, backend architecture improvements, developer infra tooling, customer-facing channel integrations, and partnership ecosystem development.

How this profile is built

Plain's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.