| Balkan Services | |
| Balkanhackathon.eu | Sofia |
| BankSoft | Plovdiv |
| BB Media Ltd | Sofia |
| BCS Bulgaria Ltd | Sofia |
| Bedigital Ltd | Sofia |
| Belayer | Sofia |
| Belvek | Sofia |
| Besco | Sofia |
| Beta Peak | Sofia |
| Betahaus BG | Sofia |
| BG Office | Sofia |
| BG Service Ltd | Sofia |
| BG Solutions | Sofia |
| BGOcloud | Sofia |
| BGOUG | Sofia |
| BGPages.com | Sofia |
| BGpro Media | Sofia |
| bgRuse.com | Ruse |
| BGWebHosting | Sofia |
| BGZone.com | Sofia |
| Bica | Sofia |
| Biizey | |
| Bilex-LP | Plovdiv |
| Biodit Global Technology | Sofia |
| Biomyc Ltd | |
| BioSeek JSC | Sofia |
| Bioteam Software Ltd | Sofia |
| BIX.BG | Sofia |
| BizLink Solutions | Sofia |
| BlackPeak Capital | Sofia |
| BLG Design | Blagoevgrad |
| Blisstool Ltd | Blagoevgrad |
| Board of European Students of Technology Sofia | Sofia |
| Bosch.IO Sofia | Sofia |
| Brand New Ideas | Sofia |
| Brand New Vision | Sofia |
| BRIGHT | Sofia |
| BrightCap Ventures | Sofia |
| British Bulgarian Business Association | Sofia |
| Browswave | |
| Browswave JSC | Sofia |
| BSH Ltd | Sofia |
| BTS One | Varna |
| Bulbera | Sofia |
| Bulcode | Sofia |
| Buldocs | Sofia |
| Bulgaria Innovation Hub | |
| Bulgaria Webdesign | Sofia |
| Bulgarian Association of Software Companies | Sofia |