This article concerns the networks of European national human rights institutions (NHRIs). It examines how the sharing of best practices takes place through networks and how NHRIs achieve cooperation at both the international and regional levels. The article also analyses NHRI cooperation within three organisations: the United Nations, the Council of Europe and the EU. While cooperation at the international level facilitates their accreditation according to their compliance with the Paris Principles and enables them to participate in the sessions of the Human Rights Council, cooperation at the European level allows them to exchange information on issues of common concern and strengthens their relationship with regional bodies. In Europe, NHRIs cooperate with the Commissioner for Human Rights of the Council of Europe and might also do so with the recently established Fundamental Rights Agency of the EU.