| 2Keys | Ontario |
| 2kPlus Information Systems Consulting, Inc. | Ontario |
| 2KRS Computer Solutions | Ontario |
| 2Marketing Web Design & SEO Toronto | |
| 2Mtel Communications | Ontario |
| 2nd Age Systems, Inc. | Ontario |
| 2nd Floor Computers, Inc. | Alberta |
| 2nd Millennium Printers & Computers | British Columbia |
| 2P Tech | Ontario |
| 2Paths | British Columbia |
| 2S Water | |
| 2SEO.com | Ontario |
| 2Ship Solutions, Inc. | Ontario |
| 2web.ca | Saskatchewan |
| 3 Heads Media | Quebec |
| 3 tier logic | |
| 3-Way Street Corporation | Ontario |
| 306 Technologies | |
| 310-Geek | Alberta |
| 315 Studio, Inc. | British Columbia |
| 321Growth Academy | Alberta |
| 323 Media | British Columbia |
| 360 Agency | Quebec |
| 360 Computers | Manitoba |
| 360 Visibility, Inc. | Ontario |
| 360Appservices.com | Alberta |
| 360insights.com | |
| 360Winnipeg | Manitoba |
| 365 iT Solutions | Ontario |
| 365 Technologies, Inc. | Manitoba |
| 368 Durham | |
| 37e Avenue | |
| 3AG Systems | |
| 3ALogic, Inc. | Quebec |
| 3CIS | Alberta |
| 3D BioFibR, Inc. | Nova Scotia |
| 3D Cellular | Quebec |
| 3D Network Technology | Ontario |
| 3D Planeta | New Brunswick |
| 3D Technologies | Ontario |
| 3DA Multimedia, Inc. | Ontario |
| 3dEYE, Inc. | Ontario |
| 3DPhacktory | Ontario |
| 3Dponics, Inc. | Ontario |
| 3dverse | Quebec |
| 3e joueur | Quebec |
| 3GL Technology Solutions | |
| 3i-Technologies | Quebec |
| 3iQ Corporation | |
| 3JDataRecovery.com | British Columbia |