| Budget Electronics | |
| Budgethost, Inc. | Ontario |
| Budgeto | Quebec |
| Buf Technologies, Inc. | |
| Bug-Track.com | Quebec |
| BugSeq | British Columbia |
| Build Marketing | Ontario |
| Build Studio | Alberta |
| Build The Vision, Inc. | Ontario |
| Build Ventures | Nova Scotia |
| Build-Your-Own-Computer.net | British Columbia |
| Builder Lynx | Ontario |
| Builder Software Tools, Inc. | Ontario |
| BuildIT Systems Corporation | |
| Builtbymike.ca IT Services | Ontario |
| Bulkley Valley Credit Union | British Columbia |
| Bull Bitcoin | |
| Bull Moose Capital Ltd | |
| Bulldozer | Quebec |
| Bulletproof | Prince Edward Island |
| Bulletproof | New Brunswick |
| Bulletproof Infotech | Alberta |
| Bulletproof Your PC | Ontario |
| Bulloch Technologies | |
| Bullrun Capital, Inc. | |
| Bullseye Digital Marketing | |
| Bumble Bees Venture Capital, Inc. | Ontario |
| Bundu Technology Ltd | British Columbia |
| Bunji | |
| Bunz, Inc. | Ontario |
| Buoyancy Works Software Corporation | |
| Burden Marketing Company | |
| Bureautech Laurentides, Inc. | Quebec |
| Bureautique Expert | Quebec |
| Bureautique FTI | Quebec |
| Bureautique Reno, Inc. | Quebec |
| Burke & Burke | Nova Scotia |
| Burl-Oak Systems | Ontario |
| Burli Software, Inc. | British Columbia |
| Burlington Computer Clinic | Ontario |
| Burlington Network Services | Ontario |
| Burlington SEO Services, Web Design & Internet Marketing | Ontario |
| Burman University | Alberta |
| BurningThumb Studios | British Columbia |
| Burr Oak Software | Ontario |
| Burr Oak Software, Inc. | Ontario |
| Bush Marketing | |
| Business + Higher Education Roundtable | |
| Business Analytics Consulting Group Canada Ltd | Ontario |
| Business Clinic | |