OGP was launched in 2011 to provide an international platform for domestic reformers committed to making their governments more open, accountable, and responsive to citizens. Since then, OGP has grown from 8 countries to 75 participating countries and 15 subnational governments. In all of these countries, government and civil society are working together to develop and implement ambitious open government reforms.

To become a member in OGP, participating countries must endorse a high-level Open Government Declaration, deliver a country action plan developed with public consultation, and commit to independent reporting on their progress going forward.