Quantum Coffee Roasters
Quantum Coffee Roasters
The Home of Tiger Bay Coffee
Quantum Coffee Roasters is an independent Cardiff coffee company built on passion, community and seriously good coffee.
Founded by Katia and Dimitri, Quantum began as a shared dream — and today it’s one of the Bay’s most loved specialty coffee spots. Real human connections, a welcoming atmosphere and a genuine love for the craft are at the heart of everything they do.
Specialty Coffee, Roasted in Cardiff
Quantum is more than just a coffee shop.
They source, roast and brew their own beans, with careful attention paid to origin, processing and flavour. Their signature Tiger Bay Espresso Blend has become a local favourite, while rotating single-origin coffees are available for those who enjoy a V60 or something a little different.
For non-coffee drinkers, the 100% dark hot chocolate is a standout.
A Proper Community Café
Quantum isn’t just about great coffee — it’s about good vibes.
Expect friendly chats at the bar, locally sourced cakes and a community atmosphere that keeps customers coming back. Over the years, they’ve built a loyal following across Cardiff thanks to their quirkiness, warmth and genuine passion for what they do.
We Source. We Roast. We Brew. You Enjoy!
From bean selection to final brew, every step matters. Quantum embraces experimentation and craftsmanship — because great coffee deserves attention at every stage.