private detectives Switzerland

Leuthold & Kostenas Private Investigators in Switzerland have been providing discreet surveillance and investigations for private clients and companies throughout Switzerland since 2001.

Our private detective agency based in Zurich consists of a team of proven specialists who are committed to our clients and their concerns. Professional competence and many years of experience create added value for our clients.

contact us

Telefon   +41 44 201 86 84

Court-approved evidence in the form of photographs, video footage and eyewitness reports from our private investigators help our clients make the right decisions at the right time.

The private detective agency Leuthold & Kostenas can confirm or refute suspected facts.

Contact us for a non-binding consultation. We also speak English, French and Italian and are networked worldwide.


It goes without saying that we treat our clients’ concerns with the utmost confidentiality and discretion.

Private Detectives in Switzerland

Our private detective agency offers private and business clients investigations and surveillance. Our team consists of specialists for background research and surveillance. If required, we have external specialists for forensics and eavesdropping defence at our disposal.

We owe the high success rate of our private detectives to our many years of experience, our modern equipment, and our strong commitment. Discretion and professionalism are our highest priorities.

Assignments are planned individually after discussion with the client, because no two cases are alike. The invoicing is transparent.

Hire a Private Detective for Infidelity

Successful investigations with intelligently deployed investigative ressources are the record of the Zurich detective agency over the past almost twenty-five years. Our detectives in Switzerland have often had the opportunity to prove civil law matters, fraud or embezzlement. A detective can also bring certainty in “matters of the heart“. Let the private detectives of the detective agency Leuthold & Kostenas prove their skills.

Why Hire a Private Detective from Leuthold & Kostenas?

Because complex economic and social issues are not unfamiliar to us. We take the concerns of our clients seriously.

contact us

Telefon   +41 44 201 86 84

private investigators