| BlackIP360 | Quebec |
| Blackiron Agency, Inc. | Ontario |
| Blackjet, Inc. | Ontario |
| Blackline Safety Corporation | |
| Blackline Systems | Ontario |
| BlackNova Internet Services | Saskatchewan |
| Blackorchid Media, Inc. | Ontario |
| Blacksea Technologies | Alberta |
| Blacksnow Company, Inc. | |
| Blacksquare, Inc. | |
| BlackSun | Saskatchewan |
| BlackTech Systems, Inc. | Ontario |
| Blackware Technologies | Quebec |
| Blade Automation | |
| Blade Creative Branding | Ontario |
| Blaeberry Solutions, Inc. | British Columbia |
| Blair Technology Solutions, Inc. | Ontario |
| Blanc Labs | Ontario |
| Blank Space Corporation | |
| Blankdvdmedia.com | Quebec |
| BlankMedia | Ontario |
| Blanko | Quebec |
| Blatant Media Corporation | Alberta |
| Blax | Quebec |
| Blaze Studios | New Brunswick |
| Blaze Telecommunications, Inc. | British Columbia |
| Blend360 Communications | Ontario |
| blendAPPS | |
| Blended Perspectives | Ontario |
| Blender Media | British Columbia |
| Blendic Design Studios | Manitoba |
| Bleu Blanc Tech | Quebec |
| Bleu3, Inc. | Quebec |
| Bleuet Design | |
| Bleuoutremer | Quebec |
| Blinco Systems, Inc. | Ontario |
| BlindDrop Design, Inc. | Alberta |
| BLiNQ | Ontario |
| Bliq Photonics | Quebec |
| Blisslogik, Inc. | Alberta |
| Blitz Media | |
| Blitzen | Ontario |
| Blitztream Games | |
| BLKFlame Marketing | |
| Blli & Dave Computer Repair | Ontario |
| Blobstation, Inc. | |
| Block 64 | Ontario |
| Block 64 Corporation | Ontario |
| Block Software | |
| Blockchain Association of Canada | |