OneTicket is a Sri Lankan online ticketing and event-hosting platform designed to help people discover events and manage ticket sales in one place. It features a range of event types, including concerts, festivals, sports events, and conferences, and supports both attendees and event organizers. Customers can browse available events and buy tickets through a convenient online checkout, while organizers can use the platform to host events, sell tickets, and manage ticketing.

OneTicket describes its service as a cutting-edge solution for public, private, and corporate events, with an emphasis on making the ticketing experience straightforward. The business is identified as an intellectual property of Spemai (PVT) Ltd, a company incorporated and registered under Sri Lankan law. The site also states that the company is governed by the Central Bank of Sri Lanka. OneTicket lists its office in Nugegoda, Sri Lanka, and provides telephone and email contact options for customer and organizer inquiries.