Series A · Productivity & Collaboration · London, United Kingdom · Founded 2020 · 11–50 employees
Plain is a London-based API-first B2B customer support platform that unifies communication channels — Slack, Microsoft Teams, Discord, email, and in-app chat — into a single collaborative workspace for support, engineering, and customer success teams. Founded in 2020 by Simon Rohrbach and Matt Vagni, both senior ex-Deliveroo employees, the company addresses the persistent disconnect between product data and support tooling. Plain's AI assistant (Ari) automates triage, drafts responses, and surfaces actionable product insights from customer interactions. The platform counts companies like Vercel, Cursor, Sourcegraph, Raycast, and n8n among its users, and has surpassed 250 customers. In February 2025, Plain raised a $15M Series A led by Battery Ventures, with continued participation from Index Ventures and Connect Ventures, bringing total funding to over $21M.