| BarloventoTech | Buenos Aires |
| basement.studio | |
| Baseside | Buenos Aires |
| Baufest | Buenos Aires |
| Baufest | |
| Bayer Sistemas | Buenos Aires |
| BCD | Santa Fe |
| BCNIS | Buenos Aires |
| Bee Web Hosting | Buenos Aires |
| Belo | Buenos Aires |
| BEON Tech Studio | Buenos Aires |
| BEON.tech | Buenos Aires |
| BHDM | Buenos Aires |
| BiblioCAD | Córdoba |
| Big Loop | Buenos Aires |
| Bigital | Buenos Aires |
| BIGSOL Soluciones Empresariales S.R.L. | Buenos Aires |
| BillBit | |
| BiocCo | |
| Biocientifica, S.A. | |
| Biomakers | |
| Bioprofarma Bagó | |
| BIOS Informática | Buenos Aires |
| Biosidus | |
| BioStudio Corporation | Buenos Aires |
| Bit S.A. | Buenos Aires |
| Bitlogic | |
| Bitlogic, S.A. | |
| BKR Argentina, S.A. | |
| Blimop | |
| Blog Automatismos Mar del Plata | Buenos Aires |
| Blog de Notebooks | Buenos Aires |
| Blog de Viajes | Buenos Aires |
| Bloop Agency | |
| Blue Vertigo | Buenos Aires |
| BlueCorp | Buenos Aires |
| BNP PARIBAS Sucursal Buenos Aires | |
| Bombieri | |
| Bonus Communications | Buenos Aires |
| Boom Studio | Buenos Aires |
| BQS Soluciones IT | Buenos Aires |
| Braessas Diseno | Buenos Aires |
| BrainLabs | Buenos Aires |
| Braires QA | Buenos Aires |
| Brandlive | Buenos Aires |
| BrandTrack | Buenos Aires |
| BrosCom S.R.L. | Buenos Aires |
| Brova Digital Group | |
| BS Buffa Sistemas | Buenos Aires |
| BSD Solutions | Buenos Aires |