Causier, located at 50 Rue de Montreuil, opened in December 2025 and is part of a vibrant neighborhood filled with independent roasteries and cafés. The shop features a La Marzocco machine, serving a range of espresso-based drinks, including espresso for €3 and flat whites for €5.50, alongside options for matcha drinks and a selection of sweet and savory food. Open every day except Thursdays, Causier offers both indoor seating and outdoor seating when weather permits, along with takeaway drinks and plant-based milk alternatives.