Plain

AI support infrastructure for B2B teams

Plain is an API-first customer support platform for B2B teams. Conversations from email, Slack, Microsoft Teams, Discord, chat, and contact forms land in a single queue that human agents and AI agents (Ari, Sidekick, or bring-your-own agents) work from. Includes workflows for automation, customer context cards, a help center/knowledge base, insights, and a GraphQL API with full UI/API parity, webhooks, and an MCP server.

Category: Other
Pricing: freemium · from $45 per user per month (Foundation, billed annually); Horizon $99 per user per month; Frontier custom
Free tier: no
API: yes
MCP server: yes
SDK: yes
Open source: no

#customer-support #helpdesk #ai-agents #api-first #b2b #workflows #mcp

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Listed 2026-10-25 · last verified 2026-10-25 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95

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