Americas & Oceania
- Argentina — Central Nacional de Inteligenzia (CNI)
- Australia — Australian Security Intelligence Organisation (ASIO); Australian Secret Intelligence Service (ASIS); Defence Signals Directorate (DSD)
- Brazil — Agência Brasileira de Inteligência (ABIN)
- Canada — Canadian Security Intelligence Service (CSIS); Communications Security Establishment (CSE)
- Colombia — Departamento Administrativo de Seguridad (DAS)
- Cuba — Directorate General of Intelligence (DGI)
- New Zealand — Government Communications Security Bureau; Security Intelligence Service
Europe
- Belgium — Veiligheid van de Staat (SV) / Sureté de l'État (SE)
- Czech Republic — Bezpecnostni informacni sluzba (BIS); UZSI
- Denmark — Politiets Efterretningstjeneste (PET); Forsvarets Efterretningstjeneste (FE)
- Finland — Suojelupoliisi (Supo)
- France — Direction Générale de la Sécurité Extérieure (DGSE); Secretariat General de la Defense Nationale (SGDN)
- Germany — Bundesamt für Verfassungsschutz (BfV); Bundesnachrichtendienst (BND); Militärischer Abschirmdienst (MAD)
- Nazi Germany — Abwehr; Gestapo; Sicherheitsdienst (SD)
- East Germany — State Security Service (Stasi/SSD); Hauptverwaltung Aufklärung (HVA)
- Greece — Hellenic National Intelligence Service (NIS)
- Hungary — Nemzetbiztonsági Hivatal (NBH)
- Italy — SISDE; SISMI
- Netherlands — Algemene Inlichtingen- en Veiligheidsdienst (AIVD)
- Norway — Politiets Sikkerhetstjeneste (PST)
- Poland — Urzad Ochrony Panstwa (UOP)
- Romania — Serviciul Român de Informatii (SRI); Serviciul de Informatii Externe (SIE)
- Spain — Centro Nacional de Inteligencia (CNI)
- Sweden — Säkerhetspolisen (SäPO)
- Switzerland — Nachrichtendienst (SND)
Middle East, Africa & Asia
- China — Ministry of State Security (MSS)
- Egypt — General Directorate of State Security Service
- India — Central Bureau of Investigation (CBI); Intelligence Bureau (IB); Research and Analysis Wing (RAW)
- Iran — SAVAK (defunct); Ministry of Intelligence and Security
- Iraq — General Intelligence Directorate; Special Security Service
- Israel — ha-Mossad le-Modiin ule-Tafkidim Meyuhadim (Mossad); Sherut ha-Bitachon ha-Klali (Shin Bet)
- Japan — Public Security Investigation Agency (PSIA)
- Pakistan — Directorate for Inter-Service Intelligence (ISI)
- South Africa — National Intelligence Agency; South African Secret Service
- South Korea — National Intelligence Service (NIS)
- Turkey — Milli Istihbarat Teskilati (MIT)
Russia / USSR
- Federalnaya Sluzhba Bezopasnosti (FSB, successor of KGB)
- Glavnoye Razvedyvatelnoye Upravlenie (GRU)
- Sluzhba Vneshney Razvedki (SVR)
- Cheka (1917–1922)
- GPU (1922–1923)
- OGPU (1923–1934)
- NKVD (1934–1946)
- MVD (1946–1954)
- MGB (1943–1953)
- KGB (1954–1991)
United Kingdom & United States
United Kingdom
- Government Communications Headquarters (GCHQ)
- Joint Intelligence Committee (JIC)
- Secret Intelligence Service (SIS/MI6)
- Security Service (MI5)
- Special Operations Executive (SOE, World War II)
- Department of Naval Intelligence
United States
- Central Intelligence Agency (CIA)
- Defense Intelligence Agency (DIA)
- Department of Homeland Security
- Federal Bureau of Investigation (FBI)
- National Imagery and Mapping Agency (NIMA)
- National Reconnaissance Office (NRO)
- National Security Agency (NSA)
- Office of Strategic Services (OSS, forerunner of CIA)
- United States Secret Service
- Air Intelligence Agency (AIA)