Company is located in Brno (Czech Republic), which is considered to be the cradle of electron microscopy in Europe.

[3] TESCAN originally manufactured programmable controllers, digitizers for older analog scanning electron microscopes, and other small accessories.

[citation needed] In 2013, TESCAN ORSAY HOLDING was established following the merger of the Czech company TESCAN, a leading global developer and supplier of scanning electron microscopes (SEMs) and focused ion beam (FIB) workstations, and the French company ORSAY PHYSICS, a world leader in customized Focused Ion Beam and Electron Beam technology.

[6] TESCAN ORSAY HOLDING comprises 7 subsidiaries located in Europe, Asia and the Americas that together employ almost 500 people.

TESCAN manufactures about 250 microscopes per year yielding  revenue of approximately US$80 million per annum.