Plain

Plain is a customer support tool aimed at B2B SaaS companies that want a developer-friendly, API-first alternative to legacy helpdesk products. Built by ex-Deliveroo and Intercom engineers, the platform emphasizes a clean keyboard-driven UI. Plain can handle chat and email like traditional Help Desks such as Zendesk or Intercom, but also power Slack, Microsoft Teams, or Discord via one UI. Plain helps you automate support across teams and tools without losing the human touch, and orchestrates work across AI and human agents. In February 2025, Plain raised a $15M Series A to build the most collaborative, AI-powered platform for the new era of B2B customer support.