| Karoll Capital Management | |
| KAV Design | Sofia |
| Keisiem | |
| KEIT Ltd | Sofia |
| Keith Devens PHP Calendar | Sofia |
| Kibertron Ltd | Sofia |
| kobo90 | Sofia |
| Kodar EOOD | Plovdiv |
| Kontrax | Sofia |
| Konversa | Sofia |
| KupiSait | Sofia |
| Laptop.bg JSC | Sofia |
| Laptop1.eu | Sofia |
| LAUNCHHub Ventures | Sofia |
| launchlabs Sofia | Sofia |
| Law and Internet Foundation | |
| Legaltech | Sofia |
| Legaltrek | Sofia |
| Lemon.bg | Varna |
| LIBRe Foundation | |
| LimeChain | Sofia |
| Linux Users Group - Bulgaria | Sofia |
| Linux-BG | Sofia |
| Lirex | |
| Lirex.com | Sofia |
| Loaris | Sofia |
| Locals | Sofia |
| LockTrip | Sofia |
| Login Technology | Varna |
| Loren Networks | |
| Loyal Consult | Plovdiv |
| Lozenec-lan.net | Sofia |
| Lucrat | Sofia |
| Ludizain | Plovdiv |
| Lukanet Ltd | |
| Lyra Software | Sofia |
| M&G Development Ltd | Varna |
| m+w MediaNetworks ЕООД | Plovdiv |
| Magazin-online.net | Varna |
| Magic Creative | Sofia |
| Mail.bg | Sofia |
| MAP marketing research | |
| Marins International Ltd | Sofia |
| Marmax Computers | Sofia |
| Mastermind Event | |
| Masterplan | Sofia |
| Maxcart | Sofia |
| MaxSoft | Sofia |
| MClimate | Sofia |
| MediaHub | |