About Prospex
Prospex helps a Swiss B2B sales team build a list of the companies worth their time, understand why each one is on it, and keep it true as those companies change.
Prospex then watches that list, and tells you the week a company on it is worth calling.
Published Aug. 12, 2026, updated Aug. 12, 2026.
Prospex is a service of Sidorenko Consulting, a Swiss sole proprietorship in Lausanne.
Sidorenko ConsultingSemion Sidorenko
Chemin du Frêne 7
1004 Lausanne
Switzerland
Corrections
If something about your company is wrong here, write to the address above and it will be corrected. Register data is reproduced from the official publication it was read from, and every row links back to that publication so a mistake can be traced to its source.