Railtech International SA, together with its subsidiaries, researches, develops, and manufactures rail welding equipment and track machinery, rail fastening systems, and urban transit electrification systems.

The company offers aluminothermic and flash butt welding for various types of rail, crossings, and switches; rail equipment for welding and track laying applications; elastic fastening systems, as well as anchoring systems, such as stud bolts, variable thread screws, insulating dowels, and sealing resins for various track applications; and electrification systems, including third rail and aluminum conductor rails, rigid overhead catenary, insulators, and trolleybus and tramways systems for urban transportation.

It also provides a range of products for maintenance and track laying applications. In addition, the company offers technical assistance, welding school, and design services. It serves railway infrastructures worldwide.

The company was incorporated in 1996 and is based in Colombes, France. Railtech International SA operates as a subsidiary of Delachaux SA.