Caplin Systems develops online trading solutions for investment banks, dealers, brokers, exchanges, and ECNs. The company’s technology provides a system for the collection, distribution, and management of market data and trade messaging over intranets, extranets, and the Internet.

Its major product is Caplin Xaqua - a single-dealer platform that integrates with the existing e-commerce trading infrastructure for the creation and assimilation of new tradeable products and instruments. Caplin Xaqua supports a variety of front-end technologies including Ajax, Microsoft Silverlight, Adobe Flex, Java and .NET.

It also offers Caplin Trader, a Caplin Xaqua application, which when combined with Caplin Xaqua becomes an out-of-the box Web trading application that enables firms to build multi-product trading portals in foreign exchange and fixed income. Caplin Trader's drag-and-drop Ajax framework includes product grids, trading panels, trade blotters, trading tickets, product and instrument search, charts, and news displays.

Caplin was founded in 2000 and is based in London, the United Kingdom