How Monterail Built the UK's Premium Event Ticketing Platform

Seat Unique needed an MVP fast enough to claim a first-mover advantage in premium live-event ticketing. Over the next eight years, Monterail built a platform that processed 6,000 transactions per month, attracted over 1 million monthly visitors, and helped the company raise £48 million. The work covered three major technology migrations, a custom virtual waiting room for peak-demand events, and a B2B seller tool used by some of the UK's biggest clubs and venues.

The company and product

Since the development of the initial MVP in 2018, Seat Unique has grown into a market leader, securing £48 million in investment to accelerate its transformation of the experiential industry and international expansion.

Seat Unique is now a full-fledged product that transforms the live event industry with an innovative ticketing and hospitality approach. The user-friendly platform seamlessly blends technology to address the key challenges of accessing tickets. The company partners with the UK's biggest and most prestigious clubs and venues.

The platform's success is evident in its 2025 performance, facilitating the sale of over 193,000 premium tickets to more than 56,000 customers and reaching 1M monthly visitors.

Seat Unique's platform received multiple awards and recognitions over the years, including 'Disruptor of the Year 2021', 4th place in the Sifted 100: UK & Ireland 2024 and 5th in the 2024 Deloitte UK Technology Fast 50

Client’s feedback

Phillipa Hicks

Co-Founder w SEAT UNIQUE

Partner, który realnie przekłada się na sukces

Skala talentu, jakim dysponuje Monterail, naprawdę robi wrażenie. To zespół zdeterminowany, pełen pasji i niezwykle zaangażowany w sukces twojej firmy. Monterail nie da się nawet porównać z innymi opcjami, które braliśmy pod uwagę przy tym projekcie, bo pod względem jakości pracy i wartości, jaką daje za te pieniądze, zdecydowanie wyprzedza wszystkich pozostałych.

Scope and Highlights

REACT AND NEXT.JS, Ruby on rails, ELIXIR

2 DEVELOPMENT TEAMS

18 MONTERAIL & CLIENT TEAM MEMBERS

£48M

raised to date

193,000

tickets sold

1M+

VISITORS MONTHLY

The Challenge

Seat Unique entered the market with a bold vision: revolutionizing the outdated, lengthy, and complicated ticket-buying experience. The timing was critical—they needed to rapidly deploy a basic product to establish a first-mover advantage.

The platform's initial success catalyzed its evolution from MVP to a comprehensive ticketing solution. As the business grew, Seat Unique focused on two critical objectives: expanding their partner network to source premium inventory and developing robust API integrations for seamless ticket distribution.

However, rapid growth presented new challenges. The increasing user base and transaction volume demanded significant technical improvements. Achieving high performance in various application parts became challenging–from the event list to checkout, even during the peak sales season (thousands of sales per hour).

Moreover, Seat Unique wanted to expand the offer by adding new partner–theaters, which required developing specialized interfaces.

KEY CHALLENGES INCLUDED

Meeting a tight deadline for MVP release to help the company get to market.

Implementing a continuous UX/UI approach to maintain a competitive advantage.

Optimizing platform performance to handle peak sales periods.

Meeting a tight deadline for MVP release to help the company get to market.

Implementing a continuous UX/UI approach to maintain a competitive advantage.

Optimizing platform performance to handle peak sales periods.

TEAM'S VOICE

Tomasz Kapłon

Tech Lead w Seat Unique

Projekt, który daje dużo satysfakcji

Seat Unique to jeden z tych projektów, które wystawiają cię na próbę i dają mnóstwo satysfakcji jako liderowi technicznemu. Nie stworzyliśmy tylko platformy biletowej, ale rozwiązaliśmy złożone problemy inżynieryjne, które bezpośrednio wpływały na tysiące użytkowników i najważniejsze wydarzenia. Każde udane wydarzenie o dużej skali potwierdzało słuszność naszych decyzji technicznych. Każda optymalizacja wydajności, każde usprawnienie UX i każda nowa funkcja bezpośrednio przekładały się na przychody oraz satysfakcję użytkowników. Kiedy nie tylko piszesz kod, ale realnie wpływasz na sukces firmy, praca daje jeszcze większą satysfakcję.

Seat Unique Application screenshots

The Process

Throughout our eight-year partnership, the collaboration between Seat Unique and Monterail evolved into specialized Business Assurance and Business Development teams, ensuring both technical excellence and strategic growth.

Our MVP leveraged Ruby on Rails, React, and PostgreSQL as the core stack, with Elixir Phoenix integrated specifically for the ticket-selling part. This architecture supported the development of a crucial milestone: our seller tool—a B2B platform built in Ruby that enables rights holders to market premium tickets and hospitality packages directly.

As we scaled beyond the MVP, we modernized frontend architecture and completely rewrote it to Next.js to ensure the website is fast, adapted to current technological standards, and scalable. Alongside this frontend overhaul, we migrated from Google Cloud to AWS to better serve our growing infrastructure needs.

Application reliability was key. We conducted extensive load testing and performance analysis, focusing on high-traffic event scenarios. Given the complex regulatory landscape of UK ticket sales, we implemented regular security audits and enhanced protection measures.

To manage peak demand periods, we developed a virtual waiting room system. This solution maintains user engagement while preventing system overload during major ticket releases.

This is how we made it happen:

Conducting architectural transformation by moving from a basic MVP stack to Next.js for improved frontend performance.
Ensuring the application handles high traffic during peak periods.
Conducting comprehensive load testing and implementing security audits.
Evolving the partnership model for better focus on technical reliability and market growth.

Team’s voice

Łukasz Pawłowski

Project Manager w Seat Unique

Partnerstwo i porozumienie na wielu poziomach

Cieszę się, że mogę być częścią trwającej już osiem lat drogi Seat Unique. To świetny przykład tego, jak skalować produkt cyfrowy od MVP do pozycji lidera rynku. W tym czasie Monterail i Seat Unique stali się jednym zespołem oraz partnerami, których łączy porozumienie na wielu poziomach. Co być może najważniejsze, to nie jest projekt krótkoterminowy. Wspaniale obserwować to wyjątkowe partnerstwo, które trwa.

The Outcome

Seat Unique has earned a reputation for innovation and excellence.

Over eight years, our partnership with Seat Unique evolved into a seamless collaboration, transforming an ambitious MVP into a market-leading ticketing platform. Our integrated team approach enabled us to adapt our technology stack and expertise to support the platform's growth.

Seat Unique has revolutionized the premium live event experience by connecting fans directly with official vendors, offering immediate online access to premium tickets and hospitality packages at competitive prices. Seat Unique now processes 6,000 transactions per month and attracts over one million monthly visitors, with one in five customers coming from overseas.

The success of this project

Successfully launching the MVP within a very short timeframe.

Managing to implement major architectural changes without disrupting ongoing business operations.

Building a long-lasting partnership between Monterail and Seat Unique.