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SIWDAY is a private transportation and chauffeur service operating in the Paris area since 2014, with contact details and service locations also listed for Monaco. The company arranges journeys for business and leisure, emphasizing safety, punctuality, comfort, and attentive customer care. Customers can request rides online and choose from options including airport transfers, city tours, corporate travel, nationwide transportation, charter services, and limousine transport for weddings and other special events. SIWDAY also lists experiential tours and transportation for passengers with disabilities among its services.

Its fleet ranges from sedans and limousines to coach buses, and the company states that it can draw on more than 2,500 vehicles to suit different travel needs. SIWDAY highlights professionally trained chauffeurs, clean and well-maintained vehicles, in-house dispatch support, and consistent pricing. The website promotes service across France and describes its office as available around the clock, while published customer-service hours are Monday through Saturday. Reservations can be arranged by route, date, time, and vehicle requirements.