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SwissTo12 SA is a private Swiss geostationary communications satellite manufacturer headquartered in Renens, Switzerland. It was founded in 2011 by Chief Executive Officer Emile di Rijk.

The company develops RF components and subsystems as well as small GEO satellites for telecommunication operators. The company focuses on the use of 3D printing. The product includes waveguides, filters and antennae, with more than 1000 components currently operating in space.

SWISSto12 partnered with ESA in 2021 to develop the first protoflight satellite model.

In 2023, SwissTo12 signed a contract with Thales to develop and supply the Ka-band Solid-State Power Amplifiers (SSPAs) that will be a key component of the antenna link between Earth and SWISSto12’s HummingSat satellites.

HummingSat
With a mass of around 800-1000kg, SwissTo12's HummingSat platform is a class of satellites positioned in the "small" category of geostationary satellites.