| Angola | People’s Movement for the Liberation of Angola (MPLA) |
| Argentina | Socialist Party (PS) |
| Australia | Australian Labor Party (ALP) |
| Austria | Social Democratic Party of Austria (SPÖ) |
| Belarus | Nadzeya |
| Belarus | Belarusian Social-Democratic Party (HRAMADA) |
| Belarus | Fair World |
| Belgium | Socialist Party (PS) |
| Belgium | Socialist Party (SPA) |
| Bolivia | Movement for Socialism (MAS) |
| Bolivia | Movement Without Fear (MSM) |
| Brazil | Workers’ Party (PT) |
| Brazil | Brazilian Socialist Party (PSB) |
| Bulgaria | Bulgarian Socialist Party (BSP) |
| Burkina Faso | Party for Democracy and Progress / Socialist Party (PDP/PS) |
| Cameroun | Social Democratic Front (SDF) |
| Canada | New Democratic Party (NDP) |
| Central African Republic | Movement for the Liberation of the Central African People (MLPC) |
| Chile | Socialist Party of Chile (PS) |
| Chile | Party for Democracy (PPD) |
| Croatia | Social Democratic Party (SDP) |
| Cyprus | Cyprus Movement of Social Democrats (EDEK) |
| Cyprus | Democratic Party (Diko) |
| Cyprus | Republican Turkish Party (CTP) |
| Czech Republic | Czech Social Democratic Party (CSSD) |
| Democratic Republic of Congo | Union for Democracy and Social Progress (UDPS) |
| Denmark | Social Democratic Party |
| Dominican Republic | Modern Revolutionary Party (PRM) |
| Dominican Republic | Dominican Revolutionary Party (PRD) |
| Egypt | Egyptian Social Democratic Party (ESDP) |
| El Salvador | Farabundo Martí National Liberation Front (FMLN) |
| Equatorial Guinea | Convergence for Social Democracy (CPDS) |
| Eritrea | Eritrean People‘s Democratic Party (EPDP) |
| Finland | Finnish Social Democratic Party (SDP) |
| France | Socialist Party (PS) |
| Germany | Social Democratic Party of Germany (SPD) |
| Ghana | National Democratic Congress (NDC) |
| Great Britain | Labour Party |
| Greece | Panhellenic Socialist Movement (PASOK) |
| Grenada | National Democratic Congress (NDC) |
| Guinea | Guinean People‘s Assembly (RPG) |
| Hungary | Hungarian Socialist Party (MSzP) |
| Hungary | Social Democrats (Szocdemek) |
| India | Indian National Congress (INC) |
| India | Association for Democratic Socialism (ADS) |
| Indonesia | Nasdem Party |
| Indonesia | Indonesian Democratic Party of Struggle (PDIP) |
| Iran | Democratic Party of Iranian Kurdistan (PDKI) |
| Iran | Komala Party of Iranian Kurdistan (KPIK) |
| Iran | Komala Party of Kurdistan (KPK) |
| Iraq | Patriotic Union of Kurdistan (PUK) |
| Iraq | Kurdistan Socialist Democratic Party (KSDP) |
| Ireland | Labour Party |
| Israel | Labour Party |
| Israel | Meretz Party |
| Italy | Democratic Party (PD) |
| |
| Jordan | Jordanian Social Democratic Party |
| Kenya | Labour Party of Kenya (LPK) |
| Kyrgyzstan | Social Democratic Party of Kyrgyzstan |
| Latvia | Latvia Concord Social Democratic Party (SDPS) |
| Lebanon | Progressive Socialist Party (PSP) |
| Lithuania | Lithuanian Social Democratic Party (LSDP) |
| Luxemburg | Luxembourg Socialist Workers‘ Party (LSAP) |
| FYR Macedonia | Social Democratic Union of Macedonia (SDUM) |
| Malaysia | Democratic Action Party (DAP) |
| Mauritania | Assembly of Democratic Forces (RFD) |
| Mauritius | Mauritius Militant Movement (MMM) |
| Mexico | Party of Democratic Revolution (PRD) |
| Mexico | Mexico Citizens’ Movement |
| Mongolia | Mongolian People‘s Party (MPP) |
| Mongolia | Mongolian People’s Revolutionary Party (MPRP) |
| Montenegro | Social Democratic Party of Montenegro (SDP) |
| Montenegro | Democratic Party of Socialists of Montenegro (DPS) |
| Morocco | Socialist Union of Popular Forces (USFP) |
| Myanmar | National League for Democracy (NLP) |
| Myanmar | Democratic Party for New Society |
| Nepal | Nepali Congress Party |
| Netherlands | Labour Party (PvdA) |
| New Zealand | New Zealand Labor Party (NZLP) |
| Niger | Nigerien Party for Democracy and Socialism (PNDS) |
| Norway | Norwegian Labour Party (DNA) |
| Pakistan | Awami Party |
| Pakistan | National Party Pakistan |
| Palestine | Fatah |
| Palestine | Palestinian National Initiative (PNI) |
| Paraguay | Guasú Front(FG) |
| Philippines | Citizens‘ Action Party (Akbayan) |
| Poland | Democratic Left Alliance (SLD) |
| Portugal | Socialist Party (PS) |
| Republic of the Congo | Convergence Citoyenne (CC) |
| Republic of the Congo | Pan-African Union for Social Democracy (UPADS) |
| Republic of Moldova | Democratic Party (PDM) |
| Romania | Social Democratic Party (PSD) |
| Sao Tome and Principe | Movement for the Liberation of São Tomé and Príncipe/Social Democratic Party (MLSTP-PSD) |
| Senegal | Socialist Party (PS) |
| Serbia | Democratic Party (DS) |
| Serbia | Social Democratic Party (SDS) |
| Slovenia | Social Democrats (SD) |
| Somalia | Somali Social Unity Party (SSUP) |
| South Korea | Democratic United Party (DUP) |
| Spain | Spanish Socialist Workers‘ Party (PSOE) |
| Saint Lucia | Labour Party |
| Swaziland | People’s United Democratic Movement (PUDEMO) |
| Swaziland | Swazi Democratic Party (SWADEPA) |
| Sweden | Swedish Social Democratic Party (SAP) |
| Switzerland | Social Democratic Party of Switzerland (SP) |
| Syria | Syrian Democratic People’s Party |
| Tanzania | Chama Cha Mapinduzi (CCM) |
| Timor Leste | Revolutionary Front for an Independent East Timor (FRETILIN) |
| Tunisia | Democratic Forum for Labour and Freedoms (Ettakatol) |
| Tunisia | Tunisian Labour Party (TLP) |
| Turkey | Republican People‘s Party (CHP) |
| Uruguay | Socialist Party of Uruguay (PSU) |
| USA | Democratic Party |
| Venezuela | Cambiemos |
| Venezuela | Instituto Progresista |
| Venezuela | Movimiento al Socialismo (MAS) |
| Western Sahara | Polisario Front |
| Yemen | Yemeni Socialist Party (YSP) |
| Zimbabwe | Movement for Democratic Change (MDC Renewal) |
| Socialist International Women (SIW) |
| International Union of Socialist Youth (IUSY) |
| Group of the Progressive Alliance of Socialists & Democrats in the European Parliament (S&D) |
| Party of European Socialist (PES) |
| Party of European Socialist Women (PES Women) |
| Young European Socialists (YES) |
| Network of Social Democracy in Asia (SOCDEM) |
| Arab Social Democratic Forum (ASDF) |
| Central African Progressive Alliance (APAC) |
| International Trade Union Confederation (ITUC) |
| Trade Union Confederation of the Americas (CSA) |
| Trade Union Advisory Committee to the OECD (TUAC) |
| Industrial Global Union |
| Solidar |
| Global Progressive Forum |
| CEE Network |
| Just Jobs Network |
| Center for American Progress (CAP) |
| Foundation for European Progressive Studies (FEPS) |
| Foundation Jean Jaurès |
| Foundation João Mangabeira |
| Friedrich Ebert Foundation (FES) |
| Olof Palme International Center (OPIC) |
| |