Short answer
A LINE OA chatbot comes in three levels. Keyword auto-reply is built in and free. LINE's AI chatbot (Beta), which answers from Q&A sets you prepare, comes with the OA Chat package at THB 555 a month plus VAT. A custom AI chatbot built on the Messaging API can answer from live data such as stock, prices or order status, and hand over to a person when unsure. Replies to customer messages do not count toward LINE's monthly message quota, so the cost sits in the package, the model and the build, not in message fees.
What each option costs
Package price from LINE for Business, checked 27 September 2026, before 7% VAT. LINE notes that some account types cannot use the AI chatbot.
| Built-in auto-reply | LINE AI chatbot | Custom AI chatbot | |
|---|---|---|---|
| Main cost | Free | OA Chat package, THB 555/month | Build, hosting and model usage |
| Answers from | Keywords you set | Q&A sets you prepare (can be generated from PDFs or images) | Your live systems plus approved documents |
| Customer-specific answers (e.g. my order) | No | No | Yes, if connected to orders or CRM |
Keeping an AI chatbot from making things up
Limit what the bot may answer from. A good design retrieves the relevant facts from your documents or database first and lets the model phrase an answer from those facts only; if nothing is found, it says so and hands over.
- Prices, promotions and stock always come from the live system, never from the model's memory
- A list of topics that always go to a person: complaints, refunds, price negotiation
- A visible way to reach an admin at every step
- Transcripts reviewed regularly, with unanswered questions fed back into the data
Before a chatbot talks to customers
- Do you know the most frequent questions, from real chat history?
- Do prices and stock come from live data?
- Can customers reach a person at every step?
- Is someone responsible for updating what the bot answers from?
- Do you know which providers see customer chat data?
Frequently asked questions
Is a LINE OA chatbot free?
Keyword auto-reply is built in and free. LINE's AI chatbot (Beta) comes with the OA Chat package at THB 555 a month plus VAT, per LINE for Business on 27 September 2026. Bot replies to customer messages do not use the monthly message quota.
Can I connect ChatGPT or another AI model to LINE?
Yes, through the LINE Messaging API. Have it search your own data first and answer from that, hand over when unsure, and estimate model cost from your real monthly chat volume.