Plain
AI-powered customer support platform for B2B teams — centralizes conversations, automates replies, and surfaces insights.
| What is it | AI-powered customer support platform for B2B teams — centralizes conversations, automates replies, and surfaces insights. |
|---|---|
| Pricing | Paid — from $35/mo |
| Free tier | No |
| Platform | Web Application |
| API | Yes |
| Best for | Managing customer inquiries from multiple channels in one place, Automating responses to common support questions |
| Domain registered | 1996 |
Data updated Aug. 1, 2026
What does Plain do?
Plain is a customer support platform built specifically for B2B companies. It pulls conversations from everywhere your customers are—like Slack, Microsoft Teams, Discord, email, and in-app chat—into a single, fast workspace. The goal is to stop the juggling act between different apps and give support teams a unified command center for all customer interactions.
What sets Plain apart is its integrated AI, designed for the nuances of B2B support. Its AI agent, named Ari, can be deployed on any connected channel to engage with customers, triage questions, and handle repetitive tasks, only escalating to a human when needed. For agents, the Sidekick AI assistant helps draft replies by understanding the full context of the customer, past conversations, and product details. A unique feature called Lookup, powered by Cursor, lets support staff ask questions directly about the company's codebase to get accurate technical answers without always needing an engineer.
This tool is for support teams at product-led companies that are scaling quickly. It helps them manage high volumes of conversations efficiently, turn support data into actionable product insights, and deflect common questions through AI and a smart Help Center. The result is a support stack that aims to make teams faster while keeping customer interactions personal and effective.
Key features
What makes it stand outWho is Plain for?
Who benefits most from this toolPricing
Foundation
- 5 user seats
- 50 AI resolutions
- 25 slack channels
- 2 email addresses
- Slack, email, in-app channels
- Ari AI agent included
- Linear, Jira integrations
- Customer cards
- AI workflows
- Get help via email + chat
Horizon
Everything in Foundation, plus:
- 10 user seats
- 250 AI resolutions
- unlimited slack channels
- 10 email addresses
- All Foundation features +
- Microsoft Teams and Discord channels
- SLAs and Business hours
- Escalation paths
- Help Center, Knowledge Base
- CRM integrations
- Reporting themes
- AI suggested responses
- Priority support via Slack
Frontier
Everything in Horizon, plus:
- custom user seats
- custom AI resolutions
- unlimited slack channels
- 25 email addresses
- All Horizon features +
- Custom AI + bring your own agent
- Sidekick AI assistant
- Lookup with Cursor
- Custom workspaces
- Custom contracting
- Advanced security
- SSO and SCIM
- Dedicated CSM + white glove onboarding
Trust & presence
Gallery
Click any image to enlargeAlternatives in Customer Service
Pylon
Verified
Customer Service
AI-powered B2B support platform that centralizes customer conversations across Slack, Teams, Email, and Chat
answeriq.com
Verified
Customer Service
AI customer service automation platform — deflect support tickets and automate agent workflows with AI and RPA integration
Crisp
Verified
Customer Service
Discover our AI-first customer support platform. Crisp brings inbound messages (think chat, emails, whatsapp, phone calls & more), AI agents (powered by Hugo, the AI Agent for customer support), workflow automations, knowledge base, multiple integrations and customer analytics together in one powerful workspace. Resolve conversations faster, reduce support workload, and keep the human touch at scale.
gleap.io
Verified
Customer Service
AI-powered customer support platform — handle tickets, collect feedback, and build features from user insights.
Convin
Verified
Customer Service
AI platform that records, transcribes, and analyzes customer calls to improve sales and support.
Helpcrunch
Verified
Customer Service
All-in-one platform for live chat, email marketing, and customer support with a shared inbox and AI tools.
Liveagent
Verified
Customer Service
AI-powered help desk software combining live chat, ticketing, call center, and chatbot in one unified platform.
Deep Talk
Verified
Customer Service
AI agents that automate customer and employee support, analyze sentiment, and generate custom dashboards.