Plain
B2B & Technical Support Help Desk & Ticketing
API-first support platform for technical B2B teams, with AI that understands your product.
- Pricing
- Paid from $35/seat/mo
- Founded
- 2020
- Channels
- Chat, Email
- Integrations
- Slack Microsoft Teams Discord Linear Jira PagerDuty GitHub incident.io Shortcut Rootly
Plain is the support platform that talks to engineers without condescension. Founded in London around 2020 by Simon Rohrbach, previously Deliveroo's design director, and Matt Vagni, it is API-first, fast, and deliberately lean, built for B2B and developer-facing companies whose customers file sharp technical questions in shared Slack channels, Discord servers, and email. Its customer list is a tour of modern developer tooling: Vercel, Cursor, Raycast, Sanity, Laravel, n8n, and Stytch, and Sanity reported a 120 percent jump in team satisfaction after switching from Zendesk.
All those channels flow into one timeline per customer, with SLAs, escalation paths, and the workflow niceties of a grown-up help desk. The AI comes as a named pair: Ari, a customer-facing agent that answers technical questions from your docs and past threads, and Sidekick, an internal assistant that helps agents draft, label, and triage. A pointed commercial choice: every plan includes Ari with no per-resolution charges, a deliberate contrast to the outcome-billing trend, though AI usage is metered through monthly credits.
Plain raised a $15 million Series A led by Battery Ventures in early 2025, about $21 million in total, and publishes its pricing: Foundation at $35 per seat per month, Horizon at $299 a month for growing teams, and a custom Frontier tier, with a 50 percent startup discount.
Choose Plain if you are an engineering-led B2B company that finds the incumbents heavy and the e-commerce tools irrelevant. It is the tasteful, technical option, and the flat AI pricing makes costs predictable in a category where the meter usually runs by the ticket.
Key features
- Ari customer-facing AI agent
- Sidekick internal AI assistant
- Slack, Teams, and Discord channels
- SLAs and escalation paths
- API-first customization
See the best Plain alternatives →
Frequently asked questions
- How much does Plain cost?
- Plain is a paid product. The listed starting price is $35/seat/mo. Compare pricing across all listed tools →
- What does Plain integrate with?
- Plain integrates with Slack, Microsoft Teams, Discord, Linear, Jira, PagerDuty, GitHub, incident.io, Shortcut, and Rootly.
- Which support channels does Plain cover?
- Plain handles customer conversations over chat and email.
- When was Plain founded?
- Plain was founded in 2020.
- What are the best Plain alternatives?
- Popular alternatives include DevRev, Pylon, and Unthread. See all Plain alternatives →
Updated August 2026
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