LINE marketing guide: broadcasts, ads and AI agents (2026)
TL;DR: Quick Summary
- LINE marketing reaches 193 million monthly LINE users worldwide, according to LY Corporation, through a free LINE Official Account.
- Broadcasts use your monthly message quota, while replies to customers don't count toward it under LINE's Messaging API pricing.
- Every broadcast, sticker campaign and ad works best when it ends in a chat that someone answers quickly.
- LINE VOOM closed in September 2026, so remove it from any campaign plan that still lists it.
- Connect your LINE Official Account to an AI agent platform so every campaign reply gets an answer, day or night.
LINE is the main chat app in Japan, Thailand and Taiwan. If your customers are there, a campaign on LINE shows up in the same chat list as messages from their family and friends.
That's the upside and the catch. A good broadcast gets people to reply, and every reply is a sales conversation your team has to pick up.
What is LINE marketing?
LINE marketing is promoting your business inside the LINE app through a LINE Official Account. Customers add your account as a friend, and you reach them with broadcasts, rich menus, coupons, promotion stickers, ads and one-to-one chat. It works best in Japan, Thailand and Taiwan, LINE's three largest markets.
LY Corporation reported 193 million monthly LINE users worldwide in March 2026, including 100 million in Japan, 54 million in Thailand and 22 million in Taiwan.
What does a LINE marketing strategy look like?
A simple LINE marketing strategy has 5 steps:
Set up a LINE Official Account. It's free. Our guide shows you how to create a LINE business account.
Grow your friend list with QR codes, friend links, stickers and ads.
Send targeted broadcasts to groups instead of everyone.
Answer every reply fast, because that's where most campaigns lose sales.
Measure and follow up with the people who clicked but didn't buy.
How much does LINE marketing cost?
Opening a LINE Official Account is free, and every market has a free plan with a monthly message allowance. You pay when you need more messages your business starts, like broadcasts. Replies to customers don't count toward the allowance, so answering fast never pushes you onto a bigger plan.
Which messages count toward your quota?
LINE's Messaging API pricing page lists push, multicast, broadcast and narrowcast messages as counted. Reply messages aren't counted.
So broadcasts cost money, but the conversations they start don't. That's why a fast reply is one of the cheapest wins on LINE.
LINE Official Account plans by market
Prices are monthly and exclude tax. Each market sets its own plans, listed on LINE's pages for Japan, Thailand, Taiwan and other regions.
Taiwan's new prices took effect on November 1, 2026. Outside the three main markets, the two paid plans aren't sold in the EU, Indonesia, Singapore or the US, and LINE Official Account isn't offered in the EU.
How do you send LINE broadcast messages?
You send broadcasts from LINE Official Account Manager, or from a platform connected to your account. Pick who gets the message, add one to three message balloons, test it on your phone and send or schedule it. Targeted broadcasts to the right group usually beat one message to everyone.
How do you target a LINE broadcast?
LINE Official Account Manager gives you two ways to narrow a broadcast:
Demographic filters: age, gender, region and similar traits. They need a target reach of at least 100 friends and use data from about three days earlier.
Audiences: groups you build, such as people who clicked an earlier message. One broadcast can target 10 audiences at most, and click and impression audiences need at least 50 users.
Which formats work best in a broadcast?
Plain text works, but tappable formats get more action. Rich messages turn one large image into a link, and rich menus keep buttons like Shop, Book or Chat with us at the bottom of every chat.
How do you send a LINE broadcast from SleekFlow?
Once your LINE Official Account is connected to SleekFlow, you send broadcasts from the same place you manage every chat:
Create a new campaign and choose LINE as the channel.
Pick a segment, such as a lifecycle stage, a label or data from your CRM.
Write the message and add variables, so each customer sees their own name or details.
Send it now or schedule it for the right time in each market.
Replies come straight back to your shared inbox, where an AI agent can answer first.
How do LINE promotion stickers grow your friend list?
Promotion stickers are free branded sticker sets that people unlock by adding your account as a friend, completing a task or downloading them. Sticker types, prices and download periods differ by market, so ask LINE's sales team for current rates.
Downloads are only the start. Choose a sticker type that makes people add you as a friend, then send new friends a welcome message with a reason to reply.
How do LINE ads work in 2026?
LINE ads reach people inside the LINE app who don't follow you yet. In Japan, LINE ads and Yahoo! JAPAN display ads became one platform, LY Ads Display Ads, on April 1, 2026, so one campaign can run across both.
Two changes matter for this year's plans:
LINE VOOM is gone. It closed in Thailand on September 28, 2026 and in Japan and Taiwan on September 30, 2026. Remove any VOOM placement from your plans.
Japan has one ad platform. LY Corporation completed the merger of its LINE and Yahoo! JAPAN ad platforms in April 2026.
How do you turn store and web traffic into LINE friends?
QR codes and friend links let people add your LINE Official Account in one scan or tap. Put them on posters, receipts, packaging, your website and social bios. Use your official account's code, not a personal one, and give each spot its own link so you can see which one brings in the most friends.
How do AI agents turn LINE campaign replies into sales?
AI agents answer LINE messages the moment they arrive, using what they know about your products and offers. They handle off-script questions, collect lead details and pass complex chats to your team. Since LINE doesn't count replies toward your quota, answering every campaign reply costs nothing extra on the LINE side.
Picture a broadcast that goes out at 8 p.m. Hundreds of people reply about price, stock and delivery, and your team only sees them the next morning.
With SleekFlow, you can deploy AI agents on LINE and build them in AgentFlow without code. They:
Answer questions about price, availability and bookings at any hour.
Guide customers through buying and collect lead details as they chat.
Read your website, so answers stay current when a promotion changes.
Hand a chat to your team with a summary, so the customer doesn't repeat themselves.
How NNIO handles midnight campaign rushes with AI agents
NNIO, a Singapore home appliance brand, sees enquiries spike after 8 p.m. campaign launches, with chats still going past midnight. It runs WhatsApp, Instagram, Facebook and website chat from one SleekFlow inbox, with AI agents on after-hours and routine questions.
The results:
40% faster response time
30% of enquiries handled by AI agents
20% more completed checkouts
The same setup works for LINE campaigns: one inbox, AI agents on the first reply and your team on the deals that need a person.
Start for free!
Grow your revenue and turn chats into conversions with AI agents. Try SleekFlow for free.
