| AdrVest | |
| adUP | |
| Advanced Installer | Dolj |
| Advanced Web Ranking | Dolj |
| Advantage Seosem | Prahova |
| ADWIZ | |
| AdWorks! Media | Bucharest |
| Ady Media Design | |
| Agenda Soft | Vâlcea |
| Agensio | |
| Agentia Feather S.R.L. | |
| Agentia Flat Studio S.R.L. | |
| Agentia re7consulting | |
| Agenția Spațială Română | Bucharest |
| Agentia WEB Bucuresti | Bucharest |
| Agentie SEO Bucuresti | |
| AgerMag.rog | Bucharest |
| Agilio Software | Cluj |
| Agis Computer | Bucharest |
| AI Tool Guru | |
| Ajaxmasters | Bucharest |
| Alevla | |
| Alex Berendei | Bucharest |
| AlexTAG | |
| Alfa Developers | |
| Alfa Software | Bucharest |
| Alfa Web | Prahova |
| Algo MediaSOFT | |
| Algorithm | Galați |
| Algotech Solutions | |
| Alkotech Labs | |
| AllNet | Bucharest |
| Altanet | Dolj |
| Altasoft | |
| Alteca Service | Bucharest |
| Altmedia Telecom | |
| Altom Consulting | Cluj |
| Amasoft Expert | Constanța |
| Amber Studio | |
| Ambo Software | |
| AMC Ro Studio | |
| AMEDEO Roumanie | Bucharest |
| Amorphys Design S.R.L. | Bucharest |
| Amplusnet S.R.L. | Mureș |
| AMSimCEL | |
| Analizoare de retea | Bucharest |
| Andonet.ro | Bucharest |
| Andrisoft S.R.L. | Timiș |
| Android Geeks | Argeș |
| Antibiotice S.A. | |