| Backlash Studio | Ontario |
| Backlit Media | Ontario |
| Backstreet Creative | Alberta |
| Bad Math, Inc. | Ontario |
| Bader Lab Computational Network Biology | Ontario |
| Badhouse Ventures | British Columbia |
| Baffin Phones | |
| baie2 | Quebec |
| Baily Creative | Ontario |
| Bajai, Inc. | Ontario |
| Baka Communications, Inc. | Ontario |
| Bako Design | |
| Balance | |
| Balance Media Ltd | Alberta |
| Bali Creative Source | Ontario |
| Baliz, Inc. | Quebec |
| BallaMedia | Ontario |
| Ballard Power Systems | |
| Balluff Canada Ltd | Ontario |
| Balsillie School of International Affairs | |
| BAM Internet Services | Ontario |
| Bambookit | British Columbia |
| Bambou Communication Marketing | Quebec |
| Ban Partners, Inc. | Ontario |
| Banchmark Data Solutions | Alberta |
| Banff International Research Station | Alberta |
| Banfield Agency | Ontario |
| Bang Marketing | Quebec |
| BANG! Creative | Ontario |
| Banjologo | British Columbia |
| Bank of Canada | Ontario |
| Bank of Montréal | Quebec |
| Bankeo | |
| Bankert Marketing, Inc. | Manitoba |
| Bankside Chase | Ontario |
| Bannersmall.com | Ontario |
| Banque de développement du Canada | |
| Banque Laurentienne du Canada | |
| Banque Nationale du Canada | |
| Banter | |
| Bar Code Applications Ltd | British Columbia |
| Baracci Solutions, Inc. | Quebec |
| Baracci Solutions, Inc. | |
| Baragar Systems | British Columbia |
| Barco Visual Solutions, Inc. | Ontario |
| Barcodes, Inc. | Alberta |
| Barcodesoft, Inc. | Ontario |
| Barctic Technology | |
| Bard & Gage | Ontario |
| Barefoot Creative | Ontario |