Delivering Luxury Customer Experiences via LINE Mini App and Salesforce

A heritage luxury brand with over 170 years of history partnered with SupremeTech to build a LINE Mini App integrated with Salesforce. The solution digitized event registration, enabled detailed customer data collection, and delivered personalized experiences — setting a new standard for digital transformation in the luxury industry.

A heritage maison founded in 1847 reimagined its client journey by using LINE Mini App and Salesforce to streamline event operations and unlock data-driven personalization at scale. Here’s how digital transformation came to life in luxury.

Overview

Founded in Paris in 1847, this iconic luxury maison has spent over 170 years crafting extraordinary high jewelry and fine timepieces. Its customers range from royalty to celebrities who expect the most premium experiences. Today, with more than 200 boutiques across Europe, the Americas, and Asia, it stands as one of the world’s most revered names in luxury.

While the brand had long focused on serving customers through physical boutiques, it reached a point where stronger digital customer engagement became increasingly important. The company wanted to create a more refined digital touchpoint, improve the way it collected and used customer data, and support broader brand awareness through more personalized communication.

To begin this transformation, the team started with a LINE mini app for recurring offline events. What began as a way to reduce manual event operations quickly evolved into a broader customer experience platform connected with Salesforce.

The Problems

For decades, the brand’s strength had been rooted in the intimate, in-store experience where every interaction was intentional and every client felt seen. But as the digital landscape evolved, so did client expectations. The brand recognized a growing need to extend its legendary service into digital channels, collect meaningful customer data, and elevate brand awareness beyond the boutique floor.

The journey began with a focused ambition: eliminate the manual inefficiencies plaguing its regularly hosted offline events. But the challenges ran deeper:

Slow, manual event processes: Registration, ticketing, and check-in at events were all done by hand, which was inefficient for both customers and staff.
Limited customer data from LINE: LINE, one of Japan’s most popular messaging apps, wasn’t being used well as a data source.
A gap in the brand experience: A standard LINE Official Account wasn’t enough to meet the high expectations of luxury customers.
No personalized communication: Without good data, sending the right message to the right person wasn’t possible.

The Solutions

Instead of quick fixes, the team built a connected digital system with LINE Mini App as the foundation.

A Smooth Event Registration Flow

A new event registration system was built inside the LINE Mini App, covering everything from sign-up to check-in. Customers could register through several easy entry points — push notifications, QR codes, and rich menus — receive a digital ticket, and check in at the venue by scanning a QR code.

The whole process felt easy and natural, while still carrying the feel of a premium brand experience. For the operations team, it meant less manual work, instant registration alerts, and a simple check-in process at the door.

Connecting LINE and Salesforce with API Extension Hub

Linking LINE and Salesforce is not straightforward. The two platforms work differently since they have different data formats and ways of communicating which makes standard integrations hard to rely on.

To solve this, the team built a custom middleware tool called the API Extension Hub. This wasn’t just a bridge between two systems, it became the central point for managing the entire customer experience.

Handling LINE events: Actions from LINE users (taps, messages, and more) are received and directed to the right process based on business needs.
Sending clean data to Salesforce: Data is formatted to work with Salesforce Marketing Cloud and Service Cloud, allowing the team to register contacts, log activity, and trigger customer journeys.
Built to grow: The hub can also connect with other tools like booking systems, POS, and inventory management, making it easy to expand over time.
Security built in: Token checks, data validation, activity logging, and alert systems keep everything running safely at an enterprise level.

This setup gave the brand the flexibility and reliability it needed to serve customers well through every digital channel.

Personalized Greeting Cards Inside the LINE Mini App

One of the most memorable features was a digital greeting card tool built inside the LINE Mini App. It gave customers a fun, personal way to engage with the brand during events and seasonal moments throughout the year.

Customers could pick from branded card templates, choose a message, add personal details like “Dear/From” and a custom note, then send the card to a LINE contact. The steps were simple and easy to follow.

To protect the brand’s image, the system automatically detected and flagged any inappropriate words with a clear error message. And because recipients were encouraged to make their own card for someone else, each greeting naturally spread the brand experience further.

The Results

The impact was clear across both customer experience and day-to-day operations. LINE Official Account registrations grew steadily, and the time spent managing events was significantly reduced.

The biggest win, however, was data. Through the Salesforce integration, the brand could now collect detailed customer behavior data from LINE, something that hadn’t been possible before. With this information, the team can now group customers more accurately and send more relevant, personalized messages on an ongoing basis.

What This Means for Luxury Brands Going Digital

This project is more than a technology story. It shows that luxury brands can go digital without losing what makes them special.

By building the LINE Mini App into the heart of the customer journey and connecting it to Salesforce in a smart way, the brand proved that high-quality service and modern technology can work together. When the technology is set up well, it becomes a way to deliver the same care and personal touch that customers expect just through a screen.

Want to explore how LINE Mini App can improve your brand’s digital experience? Let’s connect.