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How it works

Write a prompt. Connect a channel.
The AI does the rest.

No flowcharts, no decision trees, no code. You tell OneChat how to behave in plain language, plug in the platforms your customers already use, and the AI agent starts answering for you — automatically.

1

Enter your system prompt

This is the only “setup” OneChat needs: a description of your business, written the way you’d brief a new employee. What you sell, your policies, your tone. That’s it.

  • Write it in plain language — no code or flow-builders
  • Or paste your website URL and OneChat drafts it for you
  • Edit it any time; changes apply to every channel at once
2

Connect your platform

One click per channel. OneChat plugs into the messaging apps your customers already use — no widget to install on your site, nothing new for customers to learn.

  • LINE, WhatsApp, Instagram, Telegram, KakaoTalk, Shopify & Crisp
  • All platforms included in every plan — connect one or all
  • The same agent, same knowledge, on every channel
3

The AI agent answers — automatically

From the moment a channel is connected, every incoming message gets an instant answer based on your instructions. You don’t route, trigger or approve anything — it just replies.

  • 24/7, in 55+ languages, detected automatically
  • Understands voice notes on LINE & WhatsApp
  • Escalates to your Slack with full context when a human is needed

Behind the scenes

What happens when a message arrives

It reads & understands

OneChat detects the language, transcribes voice notes, and interprets the question — whether it’s typed in Japanese, spoken in English, or sent as an emoji-filled DM.

It answers from your prompt

The reply is grounded in the instructions you wrote — your products, policies and tone. Never a generic chatbot script.

It knows when to step aside

Refunds, custom orders, angry customers — anything you flagged for humans is escalated to Slack with the full conversation attached.

Your first prompt takes 5 minutes.
Your agent works forever after.

All platforms · unlimited team members · live in 15 minutes.

Get started today