Plain
API-first customer support built for engineering teams
Overview
Plain gives B2B SaaS teams a support platform built around the same GraphQL API it runs on internally, with the Ari AI agent live on every plan. Used by Linear, Resend, Vercel and Cal.com.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 12 Jul 2026 and may be out of date or incomplete.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 AI agent
- Linear and Jira integrations
- 15,000 monthly AI credits
- Microsoft Teams channel
- SLAs and escalation paths
- CRM integrations, AI-suggested replies
- Custom AI credit volume
- Discord channel support
- Advanced security, SSO/SCIM
- Dedicated customer success manager
Use cases
What you can produce with Plain
- Ari AI agent included on every plan
- Unified inbox: email, Slack, Discord, in-app chat
- Native Linear and Jira integrations
- Official TypeScript, Go and CLI SDKs
- SLAs and escalation paths (Horizon+)
- SSO/SCIM and dedicated CSM (Frontier)
ASEAN Perspective
Plain in Southeast Asia
ASEAN-region availability and pricing notes coming soon. Drop the editorial team a note via /contact/ if you can supply local context (Singapore/Malaysia/Indonesia/Thailand/Vietnam).
Unusual for support software: there's no gap between the product and the API, because Plain builds on the same GraphQL layer it sells to customers. That code-first design, plus native Slack, Linear and Jira workflows, is why engineering-heavy teams like Vercel, Raycast and Sourcegraph run support through it rather than a traditional help desk.
Ari, the AI agent, ships on every plan instead of as a paid add-on — a real point of difference from competitors that gate AI behind upsells. But several of the more useful features (SLAs, the Help Center, AI-suggested replies, workflow automations) sit behind the $299/month Horizon tier, so the $35 entry price undersells what it costs to run a real support operation. Seat-based pricing also draws complaints from teams who want occasional responders — an engineer replying once a month — without paying for a full seat. Good fit for technical B2B teams; overkill for high-volume or non-technical support.
What people say
Plain's pricing runs three tiers: Foundation at $35/month for one seat (additional seats $35 each) with 2,000 monthly AI credits; Horizon at $299/month for three seats (additional seats $99 each) with 15,000 credits, Microsoft Teams support, SLAs and CRM integrations; and Frontier, custom-priced, adding Discord channels, SSO/SCIM and dedicated customer success. All three include Ari, Plain's AI agent, with no extra per-resolution fee — a contrast with vendors that charge separately for AI resolution volume.
G2 reviewers describe Plain as bringing email, Slack, Discord and in-app conversations into one place, which is the headline draw for the engineering-first teams it targets. The company counts Linear, Resend, Liveblocks, Vercel, Raycast, Sourcegraph and Cal.com as customers, and claims 67% faster response times and roughly threefold increases in support capacity for adopters — vendor-reported figures rather than independently audited ones.
The recurring G2 complaint is the seat-based model itself: some reviewers say they'd rather pay for workload than headcount, pointing specifically to engineers who might answer a single ticket a month but still need a full seat to do it. The other friction point is feature gating — workflow automations, SLAs, the Help Center and AI-suggested replies are locked out of the entry-level Foundation plan, so a team evaluating Plain at $35/month is testing a meaningfully thinner product than the one reviewers actually praise.
What holds up is the API-first architecture: Plain runs on the same GraphQL surface it exposes to customers, with official TypeScript, Go and CLI SDKs on GitHub and example integrations for Discourse and headless support portals. That matters specifically for teams that want to build support workflows into their own tooling rather than live inside a vendor's UI — less relevant if a team just wants a help desk that works out of the box.
Summary of public user & expert reviews, compiled by RECATOOLS.
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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