The State Agency for National Security (SANS) collaborates with the competent Bulgarian institutions and has established active international cooperation on bilateral and multilateral basis with special services and competent authorities of EU and NATO, and of other countries.

The Agency is a partner of the European Anti-Fraud Office (OLAF).

SANS is a member of the European Partners against Corruption (EPAC) and the European Anti-Corruption Network (EACN).

The Agency supports UN Development Program (UNDP) and UN Office on Drugs and Crime (UNODC) in their campaign “Your NO Counts!” aimed at increasing the public intolerance towards corruption.