- Linxtelecom Estonia OÜ
- Telia Eesti AS
- Elisa Eesti AS
- Tele2 Eesti AS
- Relacom Poland
- Leonhard Weiss Energy AS
- KH-Energia-Konsult AS
- Empower AS
- Rito Elektritööd AS
- AS Elektritsentrum
- Telegrupp AS
- Optimus Systems AS
- Nordecon AS
- Bauschmidt OÜ
- AS Merko Infra
- Tallinna Teede AS
- Lemminkäinen Eesti AS
- AS Teede REV-2
- TREF Nord AS
- RTS Infraehitus OÜ
- InfraRoad OÜ
- Viamer Grupp OÜ
- AS Tallinna Lennujaam
- Lennuliiklusteeninduse AS
- Tallinna Sadam AS
- Swedbank AS
- AS SEB Pank
- Eesti Krediidipank AS
- Eesti Pank
- Elektroskandia Baltics OÜ
- SLO Eesti AS
- Energo Veritas OÜ
- Lansyst OÜ
- Baltronic OÜ
- Astrec Baltic OÜ
- Geoplan Eesti OÜ
- AS EXACT Geomark