In 2025, SAXON Q demonstrated a 4-qubit quantum computer running at room temperature in Germany. 2 years later, the startup opened orders for 128-qubit and 512-qubit systems that fit inside ordinary server racks

A quantum computer that sits at room temperature sounds almost wrong. For years, the field has been associated with giant refrigeration systems, elaborate laboratories and temperatures hovering just above absolute zero. Now a Leipzig startup says customers can order diamond-based machines that run without that infrastructure. But the most important number on these computers may not be the number printed on the front of the machine. SAXON Q’s new SXQ128 and SXQ512 are advertised as 128- and 512-qubit systems, yet their architecture reveals a more complicated story about what those qubits can actually do.

SAXON Q is selling a very different kind of quantum computer