eco was founded in 1995 and currently numbers more than 500 members. Its fields of activity include:
- Infrastructure - technical issues from backbone to outlet, such as WLAN, VoIP, peering, data retention, the German telecommunication monitoring regulation etc
- Applications - anti-spam and security technologies, e-payment systems, Cloud Computing
- Content - self regulation and data protection, copyright, online marketing
- Services - legal aid, the white list project "Certified Senders Alliance" (CSA), datacenter audit and others
eco fosters extensive knowledge sharing among its members by organizing various thematic events such as working groups, forums, LocalTalks, roadshows, trade show appearances and cooperation.