I.O Café
the iced coffee, considered among the best in Paris
Small but mighty specialty coffee shop in the Marais district, known for its focus on high-quality beans and minimalist aesthetic. 1 It's a great spot for serious coffee lovers looking for a perfectly brewed cup, often featuring beans from renowned roasters like La Cabra.
In Le Marais, Paris. Easy to fold into a morning or a longer afternoon; there's usually something else worth a stop within a few minutes' walk.
I/O Café (formerly Fondation Café) is a small specialty coffee shop in Paris's 3rd arrondissement (Le Marais area), its name a nod to the on/off buttons of a coffee machine. It is built around an intentional, Danish-inspired minimalist aesthetic softened by books and art, serving coffee in handmade ceramic cups. The menu is deliberately simple: single-origin beans from roasters like La Cabra brewed via V60, pour-over, batch brew, espresso, and cold brew, plus a small curated selection of daily pastries; they also sell retail beans. It has a cult following for what many call the best iced coffee in Paris. The space is very small with limited indoor seating, so it can feel cramped, especially in winter without outdoor seating. Hours are roughly Mon–Fri 8:30am–5:30pm, Sat 9:30am–5:30pm, closed Sundays.