LINE Extension Tools Compared 2026: L Step, Liny & More

#What Are LINE Extension Tools?

A LINE extension tool (LINE拡張ツール in Japanese) is a third-party platform that connects to your LINE Official Account through the Messaging API and adds capabilities the standard LINE Official Account Manager does not offer — or offers only in a limited form:

• Step messaging (drip sequences that fire on a schedule after a user adds your account)
• Fine-grained segmentation based on tags, answers, and click behavior
• Per-user rich menu switching (different menus for leads vs. customers)
• Conversion tracking from friend-add to purchase
• Chatbots and auto-replies beyond simple keyword matching

The category was essentially invented in Japan, where LINE is the dominant messaging app, and the Japanese market still hosts the most mature players: L Step (Lステップ), Liny, L Message (エルメ) and Proline Free (プロラインフリー). Newer entrants such as LineBot.pro focus on AI-powered content generation and multilingual operations across Japan, Thailand, and Taiwan.

If you have not yet set up your account, start with our LINE Official Account setup guide — every tool below assumes you already have an OA with Messaging API access.

#Feature & Pricing Comparison Table

Public pricing changes frequently; figures below are approximate published starting points as of mid-2026. Always confirm on each vendor's official site.

Three structural differences matter more than any single feature:

1. Pricing model — Japanese tools charge fixed monthly tiers (often scaled by message volume); LineBot.pro uses credit-based pricing where you pay for what you generate and send.
2. Language coverage — L Step, Liny, L Message and Proline are Japanese-first products with Japanese-only interfaces. LineBot.pro operates in English, Thai, Japanese, and Traditional Chinese.
3. Content creation — the established tools automate delivery; they assume you design rich menus and messages elsewhere. LineBot.pro generates the rich menu images and rich messages themselves with AI.

#L Step (Lステップ)

L Step is the best-known LINE extension tool in Japan and the reference point everyone else is compared against.

Strengths

• The deepest step-messaging (ステップ配信) and scenario engine on the market — branch sequences on tags, survey answers, link clicks, and purchase events
• Per-user rich menu switching, so a prospect and a paying customer see different menus
• Funnel and conversion analytics down to individual friend level
• A large ecosystem of certified consultants and agencies who build L Step funnels professionally — genuinely valuable if you outsource

Considerations

• Japanese-only interface and documentation
• No free plan; entry tier starts around ¥5,000/month and message-volume limits push growing accounts into the ~¥20,000-30,000/month tiers (see the official site for current pricing)
• Content creation (menu design, message copy) is entirely on you

Best for: Japanese businesses running serious funnel marketing on LINE who can invest in setup, or who hire an L Step consultant.

#Liny

Liny, developed by Social Data Bank, positions itself upmarket: large enterprises, franchises, and Japanese local governments (municipal LINE accounts for disaster alerts and citizen services are a notable niche).

Strengths

• Enterprise-grade segmentation and delivery controls
• Strong track record with government and large-organization deployments, which implies solid security and operations practices
• Team features for multi-operator customer service inboxes

Considerations

• Pricing is quote-based — you must contact sales, which signals its enterprise focus
• Overkill for a small shop that mostly needs auto-replies and a good rich menu

Best for: Enterprises and public-sector organizations in Japan with procurement processes and dedicated ops teams.

#L Message (エルメ)

L Message (often called エルメ) competes directly with L Step at a lower price point, and is popular with solo businesses and small teams.

Strengths

• A genuinely usable free plan to start
• Paid plans historically start around ¥10,000/month — cheaper than L Step's equivalent tiers (confirm on the official site)
• Built-in extras like reservation/booking forms and simple payment links, which small service businesses appreciate

Considerations

• Smaller consultant ecosystem than L Step
• Japanese-only

Best for: Japanese small businesses and creators who want L-Step-style automation on a budget.

#Proline Free (プロラインフリー)

Proline Free is famous for its aggressive free tier — the free plan includes step messaging and scenario delivery with generous limits, which made it a favorite among info-product marketers and coaches in Japan.

Strengths

• The most generous free plan among Japanese tools for step delivery
• Funnel-building orientation: landing pages, scenario branching, and upsell paths in one place

Considerations

• The interface has a steeper learning curve, and the product's own upsell funnels are part of the experience
• Paid tier pricing is best checked directly on the official site
• Japanese-only

Best for: Budget-conscious Japanese marketers who want full step-messaging without a monthly fee and accept the learning curve.

#LineBot.pro

LineBot.pro approaches the category from a different angle: instead of only automating delivery, it generates the content itself with AI and runs in four languages.

Strengths

• AI generation: describe your business and get a ready-to-upload rich menu (correct 2500x1686 specs), rich messages, and promotional visuals — no designer needed
• AI chatbot replies with a no-code chatbot builder, including escalation to human agents
• Multilingual by design: interface and content generation in English, Thai, Japanese, and Traditional Chinese — practical if you serve tourists or run OAs in several markets
• Credit-based pricing with a free plan (50 credits): light users are not locked into a fixed monthly tier

Considerations — honest ones

• The step-messaging and funnel-analytics depth of L Step, built over many years for the Japanese funnel-marketing scene, is more granular than LineBot.pro's campaign engine today
• No certified-consultant network like L Step's — LineBot.pro is designed for self-serve

Best for: SMEs in Thailand, Japan, or Taiwan that want AI to handle design and replies, multilingual teams, and anyone who prefers usage-based pricing over fixed tiers.

#Regional Alternatives (TH & TW)

The Japanese tools above rarely fit non-Japanese-speaking teams. If you operate primarily in Thailand or Taiwan, also evaluate local players:

• Thailand: Zwiz.ai and BotNoi are established Thai chatbot platforms with Thai-language support and local payment habits. See our detailed LINE bot builder comparison for Thailand.
• Taiwan: Crescendo Lab (漸強實驗室 / MAAC) and Omnichat are the leading Taiwanese LINE marketing platforms, both strong on e-commerce integrations with local storefronts.

LineBot.pro overlaps all three markets with one account, which is its core differentiator versus single-market tools.

#How to Choose the Right Tool

Work through these questions in order:

1. Which language does your team work in? If not Japanese, the four Japanese tools are effectively off the table.
2. Do you need deep funnels or great content? Multi-branch scenario funnels → L Step or Proline. Fast, professional rich menus and messages without a designer → LineBot.pro's AI generation.
3. What is your budget shape? Predictable fixed cost → monthly-tier tools. Spiky or low volume → credit-based pricing or a free plan (L Message, Proline, LineBot.pro).
4. One market or several? Multi-market OAs benefit from one multilingual platform instead of one tool per country.

Whichever you pick, pair it with a sound strategy — our guide to LINE marketing automation strategies covers sequencing, segmentation, and frequency rules that apply to every tool on this list.

#Frequently Asked Questions

Q: What is L Step (Lステップ)? L Step is Japan's most widely known LINE Official Account extension tool. It adds step messaging, tag-based segmentation, per-user rich menus, and funnel analytics on top of a LINE OA, with plans starting around ¥5,000/month.

Q: Is there a free LINE extension tool? Yes. Proline Free and L Message both offer free plans in Japan, and LineBot.pro's free plan includes 50 credits for AI generation. Feature limits differ, so match the free tier to your actual volume.

Q: Can I use L Step or Liny outside Japan? Technically the Messaging API works on any LINE OA, but these tools have Japanese-only interfaces, documentation, and support. Non-Japanese teams usually choose a local platform or a multilingual one like LineBot.pro.

Q: Do extension tools replace the LINE Official Account Manager? No — they complement it. You still manage the account, verification, and billing through LINE. The extension tool connects via the Messaging API webhook, which means basic auto-replies configured in OA Manager are typically disabled in favor of the tool.

Q: What does an extension tool cost compared to LINE's own fees? They stack. You pay LINE for messages beyond your OA plan's free quota, plus the tool's own subscription or credits. Factor both into ROI — our LINE automation service page explains typical total costs.

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Next steps:

• Generate your first AI rich menu in 60 seconds
• Compare Thai platforms in the LINE bot builder comparison for Thailand
• Plan sequences with LINE marketing automation strategies