Plain
API-first customer support built for engineering teams
Overview
Plain gives B2B SaaS teams a support platform built on the same GraphQL API it runs on, with Slack, email and in-app channels, Linear and Jira links, a help centre, and the Ari AI agent on every plan, drawing on monthly credits. Used by Vercel, Cursor, Raycast and n8n; from $35 a month billed yearly.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 1 Oct 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
- 2,000 monthly AI credits
- Slack, email, in-app channels
- Ari, Sidekick and up to 5 AI workflows
- Help Center and knowledge base
- Linear and Jira integrations
- 15,000 monthly AI credits
- Microsoft Teams channel
- SLAs, business hours and escalation paths
- CRM integrations, AI-suggested replies
- Custom AI credit volume
- Discord channel support
- SSO/SCIM, bring your own agent
- Dedicated customer success manager
Use cases
What you can produce with Plain
- Ari AI agent and Sidekick assistant on every plan (credits apply)
- Unified queue for Slack, email and in-app chat (Discord on Frontier)
- Native Linear and Jira integrations
- GraphQL API with an MIT-licensed SDK and Cursor/Claude Code plugins
- Help Center and knowledge base from Foundation
- SLAs and escalation paths (Horizon+)
- SSO/SCIM and dedicated CSM (Frontier)
Unusually for support software, there is no gap between Plain's product and its API: it builds on the same GraphQL layer it sells, which — with native Slack, Linear and Jira workflows — is why developer-tool companies such as Vercel, Raycast and Sourcegraph run support through it. Ari, the AI agent, and Sidekick, the team assistant, come on every plan, and the $35 Foundation tier now also includes the Help Center and AI workflows, so the entry price buys more than it used to. Ari draws on the plan's monthly AI credits rather than being unlimited, and SLAs, escalation paths, CRM integrations and Microsoft Teams still need Horizon at $299 a month, with Discord and SSO on custom-priced Frontier. Developers integrating it should note the TypeScript SDK was replaced in June 2026. A strong fit for technical B2B teams; overkill for high-volume consumer support.
What we found
Plain is a support platform for business-to-business software companies, built on the same GraphQL API it exposes to customers, so anything the app does can also be scripted. It brings Slack channels, email and in-app chat into one queue, links conversations to Linear and Jira issues, and ships Ari, an AI agent that answers customers directly, and Sidekick, an assistant for the support team. The customer list leans developer-tool: Cursor, Vercel, Raycast, n8n, Granola, Sourcegraph, Resend and Fly.io are among the names Plain shows.
The tiering is more generous at the bottom than it was. Foundation, at $35 a month billed yearly for one seat (up to five at $35 each, with unlimited view-only seats), now includes the Help Center, a knowledge base, up to five AI workflows, Ari, Sidekick and 2,000 monthly AI credits. Horizon, $299 a month for three seats (up to ten at $99 each), adds Microsoft Teams, SLAs and business hours, escalation paths, CRM integrations, AI-suggested replies and 15,000 credits. Frontier is custom-priced and adds Discord channels, SSO and SCIM, bring-your-own AI agent and a dedicated customer success manager. Ari has no per-resolution fee, but it does consume the plan's credits. There is a seven-day trial with no card, and startups can get 50% off.
Developers should note an SDK shake-up: the TypeScript SDK was deprecated and archived in June 2026 in favour of a new MIT-licensed package that needs Node 24, and the Go repository holds only types, not an SDK. Plain also publishes plugins for Cursor and Claude Code.
The company, founded by former Deliveroo engineers, raised a $15 million Series A led by Battery Ventures in February 2025. It is SOC 2 Type II certified and runs on AWS in London. The changelog shows weekly releases. G2 lists 27 reviews averaging 4.5, many from seller invitations, so treat them as a small sample. Plain's own figures — Ari handling 40% of volume, a 67% faster first response at Sourcegraph — are vendor case studies.
Compiled by RECATOOLS from public sources: vendor documentation and pricing, code repositories and published reporting.
About this listing
This entry was compiled from publicly available data including Plain's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with Plain unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
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