Sundayapp Raises $21 Million Series B to Expand Restaurant Payments and Guest Experience Platform

Sundayapp, an Atlanta-based restaurant payments and guest experience platform, has raised $21 million in a Series B funding round, strengthening its position as a fast-growing technology provider for the hospitality industry. The funding is set to support continued expansion of its integrated payment and guest engagement platform across the United States and international markets.

The Series B round included participation from DST Global Partners, a global investment firm known for backing high-growth consumer and technology companies. The continued support reflects investor confidence in Sundayapp’s ability to modernize how restaurants manage payments, customer interactions, and data across the entire dining journey.

Founded in 2021 by Christine de Wendel alongside restaurateurs Victor Lugger and Tigrane Seydoux, Sundayapp initially launched as a QR-code-based payment solution aimed at simplifying the checkout process in restaurants. Diners can scan a QR code at the table, pay from their phone, and leave tips or feedback without waiting for a server or payment terminal. Since then, the company has expanded its product into a broader guest experience platform that combines payments, ordering, loyalty, CRM, and feedback tools into a single system.

Sundayapp has seen rapid adoption in a short period of time. The platform is now used by more than 3,000 restaurants and serves over 80 million diners each year, ranging from casual dining venues to fine-dining and Michelin-starred restaurants. Its focus on reducing friction at key moments in the dining experience has resonated with operators looking to improve efficiency while enhancing guest satisfaction.

The newly raised capital will be used to accelerate product development and expand Sundayapp’s geographic footprint, particularly in the U.S. market. The company is rolling out features tailored to different restaurant segments, including smart kiosk solutions for fast-casual restaurants and refined QR workflows for fine dining that preserve ambience while still enabling data capture. Sundayapp emphasizes integration rather than replacement, with the platform currently supporting more than 50 integrations with existing restaurant technology systems.

A core differentiator for Sundayapp is its ability to transform the payment moment into a valuable data and engagement touchpoint. Restaurants using the platform are able to collect significantly more guest feedback and customer contact information compared with traditional payment flows. This data helps operators build stronger relationships with guests through personalized communication, loyalty programs, and improved service insights.

Leadership has played a central role in shaping the company’s direction. Co-founder and U.S. CEO Christine de Wendel has positioned Sundayapp as a “guest intelligence” platform, where payments, ordering, loyalty, and CRM are connected into a single experience. The goal is to help restaurants better understand their guests while simplifying operations for staff, particularly in an industry facing ongoing labor and cost pressures.

Over time, Sundayapp has expanded well beyond its original payments focus. The platform now supports web and mobile ordering, integrated loyalty programs, customer relationship management tools, tipping optimization, and real-time feedback collection. These capabilities allow restaurants to generate incremental revenue, improve operational efficiency, and gain deeper insight into guest behavior.

International expansion is also part of Sundayapp’s growth strategy. In addition to its presence in Europe and North America, the company has identified the Middle East, including the UAE, as a key growth market. By partnering with large restaurant groups in these regions, Sundayapp aims to replicate its adoption model and scale quickly in new geographies.

The Series B round builds on earlier fundraising efforts that helped establish Sundayapp’s global footprint and product roadmap. With cumulative funding exceeding $100 million, the company now has the financial backing to continue investing in innovation and market expansion.

As restaurants increasingly turn to digital tools to enhance guest experiences and improve margins, Sundayapp’s unified approach to payments and engagement positions it as a key player in the evolution of hospitality technology. With fresh capital and growing adoption, the company is poised to further redefine how diners and restaurants interact at every stage of the dining experience.