| Name | Region |
|---|---|
| Avokaado OÜ | |
| Axmit | |
| BadgeGo | |
| BaIT Partner OÜ | Harju |
| BaltCap | Harju |
| Baltic Computer Systems | Harju |
| Baltronic OÜ | Harju |
| Bamboo Agile | Harju |
| Bamboo Apps | Harju |
| BannerBoo OÜ | |
| Barking | Harju |
| Basis 33 | |
| Bauhub | Harju |
| BDC Consulting | Harju |
| Beamline OÜ | |
| Beast | Harju |
| Beehosting | |
| BeeServer OÜ | Harju |
| Beholder | |
| Benuevo | |
| BestIT OÜ | Harju |
| Better Medicine OÜ | |
| Binalyze | |
| BIND | |
| BioBlends | |
| BiotaTec | |
| Bisly | |
| Bisly | |
| Biteful | |
| Bitlevex | |
| Bitskout OÜ | |
| Black Arrow Biotech OÜ | |
| Black Wing Foundation | Harju |
| Blakitech OÜ | Harju |
| Blakitech OÜ | |
| Blockfrost.io | |
| BlocktradeOperations OÜ | |
| BluCloud Group OÜ | Harju |
| BlueInk OÜ | |
| Bluemoon Interactive | Harju |
| Bolt Technology OÜ | Harju |
| Bondora Capital OÜ | |
| BOST IT OÜ | |
| Botgate AI Technology OÜ | |
| BotGuard OÜ | Harju |
| BotSpace Technologies OÜ | |
| BPW Consulting | Harju |
| Brandner PCB OÜ | |
| Brightside OÜ | |
| Brite Apps |