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Accuray Incorporated
Accuray builds and sells radiation therapy machines that hospitals use to treat cancer patients.
Accuray makes the machines that hospitals use to fire precise beams of radiation at tumors. Its two main product lines are the CyberKnife and the Radixact (formerly called TomoTherapy). Both are radiation therapy and radiosurgery systems, which means they treat cancer patients by delivering focused radiation rather than cutting people open.
The CyberKnife is the more distinctive product. It has a robotic arm that moves around the patient and tracks the tumor as the patient breathes, so it can hit hard-to-reach tumors in the brain, spine, lungs, or prostate without a rigid metal frame bolted to the patient's head. The Radixact is a more conventional machine that rotates around the patient and treats a wide range of cancers. Hospitals pay Accuray for the system up front, and then pay for software, service contracts, and replacement parts over the machine's life. So who pays, and why choose Accuray? The customers are hospitals and cancer centers. They choose Accuray when they want to offer advanced, precise treatments that competitors like Varian (owned by Siemens Healthineers) or Elekta also sell. Accuray's pitch is precision and the ability to treat tumors that are moving or hard to reach. The catch is that these machines are expensive, and hospitals often buy them through financing arrangements, so Accuray carries real debt and has struggled at times to grow profitably.
Accuray is headquartered in Sunnyvale, California, and it sells worldwide. The company has spent years trying to turn steady demand for precision radiation into consistent profits, and it uses its cash to develop new software and systems, service its debt, and fund operations. The business is a genuine, established player in cancer care, but it is a small one in a field dominated by bigger rivals, which is why its results swing on how many hospitals decide to buy a new machine each year.
Saved answer · last researched 15 Nov 2026