Synapse, an artisan roastery that opened in May 2023, is located at 2 Rue du Fer à Moulin. This café specializes in espresso-based drinks and slow extraction methods, using their own Synapse beans to ensure quality in every cup. Prices start at €2.50 for an espresso, with options for regional coffee drinks and plant-based milk alternatives. Open seven days a week, Synapse offers both indoor seating and outdoor options, situated amidst the vibrant student energy and historic bookshops of the Latin Quarter.