- Advanced Business Consulting Ltd.
- Agency for Social Assistance
- Bulgarian Academy of Sciences
- Bulgarian Air Traffic Services Authority (BULATSA)
- Bulgarian Institute for Legal Initiatives
- Bulgarian Investment Agency
- Bulgarian Water Assosiation
- Center for Inclusive Education
- Center for Regulatory Impact Assessment
- Center for Research and Analysis
- Council of Ministers
- Deaf Unlimited Foundation
- Executive Agency General Labor Inspectorate
- Five Consult
- General Directorate “Fire Safety and Protection of the Population” – Ministry of Interior
- Global Libraries Foundation
- ICF Consulting Services Ltd
- International Social Service – Bulgaria Foundation
- Kaynardzha Municipality
- Maritsa Vegetable Crops Research Institute
- Metis GmBH, Vienna, Austria
- Ministry of Education and Science of Bulgaria
- Ministry of Labour and Social policy
- Ministry of Regional Development and Public Works
- National Center for Addictions
- Overgas Ltd
- Proxima Consult
- REI, USA
- Sandanski Municipality
- Sigma Hat
- State Agency for Child Protection
- Teach for Bulgaria Foundation
- The University of Basel, Switzerland
- Trust for Social Achievement Foundation
- UNICEF