Railteam B.V. is a closed company with limited liability (B.V.) based in Amsterdam, the Netherlands. It operates as an alliance of European railway companies in the field of international high-speed rail in Europe, modelled on the airline alliances and was founded in Brussels on 2 July 2007.

Taken together, the Railteam alliance has more than 1000 high-speed trains and 44 lounges. With the members of the Railteam alliance, passengers can reach over 100 European destinations on high-speed trains.

Any railway company in Europe that meets the criteria of the alliance can become a member.

There are full members of Railteam who hold shares in the company, as well as associate members. All participating railways act as strategic partners within the Railteam alliance and remain entrepreneurially independent. By this alliance, trains are seen as high-speed when they reach a minimum speed of 230 km/h: Intercity Express, TGV inOui, Eurostar, TGV Lyria, and Railjet. The transport network of the long-distance trains offered in Railteam covers about 100 cities in seven countries (Belgium, Germany, France, United Kingdom, the Netherlands, Austria and Switzerland), which are connected by a network of about 15,000 kilometres.

The full members include the following companies:

The associate members include:

The main hubs of the route network are Brussels-South, Lille/Lille Europe, Paris, Cologne Hbf, Frankfurt Hbf, Stuttgart, Basel and Zurich.

Europe's high-speed railways create added value for passengers by joining forces and continuously working to increase the capacity of the high-speed network and upgrade routes. The aim is to offer passengers seamless travel chains between many European cities, with shorter journey times and more frequent connections, as well as uniform service and quality standards. The development of a common network should thus offer a competitive alternative to car and plane for destinations within Europe.