Feb 9, 2026
Introducing Bring Your Own Agent

You can now connect any third-party AI agent to Plain using our API, alongside or instead of Plain's native AI agent.
This means your team can use whichever agent fits your needs — Parahelp, Sierra, Decagon, Fin, Decimal, or your own custom build — without giving up Plain's infrastructure. Your channels, queues, workflows, and escalation paths all work the same regardless of which agent is handling the conversation.
Your agent subscribes to webhooks, responds to threads, and manages status through our API. When a human agent steps in, Plain automatically transitions the thread to handed off so it surfaces in the right queues.
All agent activity appears under Plain AI → Activity, where you can see every thread your agent has interacted with, basic stats, and a breakdown by status. Human-centric queues like My Threads, Needs First Response, and Needs Next Response automatically filter out AI-handled threads so your team stays focused on what needs a person.
To get started, check out the setup guide.
Designed, built and written by
Dimitra Zuccarelli
Engineering
Andrew Blaney
Engineering
Julius Yanik
Design
Susana de Sousa
Community
Ready to get started?
Join the teams who rely on Plain to provide world-class support to their customers.
Join our team
We're building an intentionally small, fast-moving and product centric team.







