| AlfaBit Ltd | Sofia |
| Alfeeli International Ltd | Sofia |
| Alle.bg | Sofia |
| Allterco JSCo | Sofia |
| AllWeb Agency | |
| Alpha Best | Sofia |
| Alpha Grissin Infotech BG AD | Sofia |
| Alpha Intellect | Sofia |
| Alpha Source Ltd | Sofia |
| Alphavision.bg | Varna |
| Alpo Web Design Studio | Sofia |
| ALSO Bulgaria Ltd | Sofia |
| Altech Online Store | Sofia |
| AMATAS | |
| American University in Bulgaria | Blagoevgrad |
| Amexis | Sofia |
| Amigo Style | Sofia |
| Ampeco | Sofia |
| AMT.BG | Sofia |
| Anakatech | Sofia |
| ANDI | Plovdiv |
| Android България | Sofia |
| Anthill | Sofia |
| Antipodes | Sofia |
| Antivirus.bg | Sofia |
| ApiHawk Ltd | |
| Apollo Digital | Sofia |
| App Streams Ltd | |
| Appolica | Sofia |
| Appzio | Sofia |
| Ardes.bg | Sofia |
| ARGO-CONTAR | Sofia |
| ArtDesign Creative Studio | Sofia |
| Artery Team Ltd | Sofia |
| Arya Finance | Pernik |
| ASBISc Enterprises Plc | Sofia |
| Ask Net | Sofia |
| ASPhostBG Software | Sofia |
| Association of Software Engineers | Sofia |
| Astea Solutions AD | |
| Asysta Ltd | Sofia |
| Atlantis BG Ltd | Sofia |
| ATM Electronics Ltd | Sofia |
| Atom Solutions | Sofia |
| AVG Bulgaria | Sofia |
| Axis.bg | Plovdiv |
| AzonMedia | Sofia |
| BAIT | Sofia |
| Balkan Blockchain Association | Sofia |
| Balkan Internet Exchange | Sofia |