3S SOT was established in 1993 by some of the greatest professionals in the security business in Bulgaria.

The first name of the company – “Three S” comes from the short for Satellite Security Systems.

1996 is the beginning of the territorial development of 3S SOT Ltd. On April 4, 1996 our first filial – 3S SOT Plovdiv Ltd. was established. With the help of 3S SOT AD another 40 companies have been founded all over Bulgaria between 1996 and 2006.

2007 – 21 Trade Companies take the decision to join 3S SOT AD.

At the moment, 3S SOT has 50 000 clients, 53 offices, more than 200 automobiles, and more than 2600 employees. We are the only company in Bulgaria which can provide all types of security services on the territory of the whole country.