| Interimia | |
| Interior Telecom | British Columbia |
| Interkey Solutions | Ontario |
| InterLAN Consulting, Inc. | Ontario |
| Internal I.T. Ltd | |
| Internal Office Solutions, Inc. | Ontario |
| InternAlysis | Ontario |
| International Accreditation Forum, Inc. | |
| International Bar Coding Systems & Consulting, Inc. | British Columbia |
| International Data Engineering, Inc. | Ontario |
| International Data Systems | Ontario |
| International Data Technologies Corporation | Ontario |
| International Datacasting | Ontario |
| International Development Research Centre | Ontario |
| International Electronic Components, Inc. | Ontario |
| International Federation of Biomedical Laboratory Science | |
| International Institute of Communications Canada Chapter | Ontario |
| International Internet Advertising Services, Inc. | British Columbia |
| International Loss Prevention Systems | British Columbia |
| International Payment Solutions | |
| International Research Laboratory – Laboratoire "Frontières Quantiques" | Quebec |
| International Software Products | Ontario |
| International Submarine Engineering Ltd | |
| International Telephone Products Ltd | Ontario |
| International Transaction Systems | Ontario |
| Internet Alberta | Alberta |
| Internet Based Learning Ltd | Ontario |
| Internet Business Solutions Ltd | New Brunswick |
| Internet C.H.Y.L. | Quebec |
| Internet Entrepreneurs | Alberta |
| Internet Infinity | Quebec |
| Internet Kent, Inc. | Ontario |
| Internet Media Solutions.ca | Ontario |
| Internet Security News | Saskatchewan |
| Internet Unlimited Ltd | Alberta |
| Internet-BC | British Columbia |
| InternetAdvisor.ca | Ontario |
| InternetGuys | British Columbia |
| InternetHosting.ca | |
| InternetPro | |
| Internexe Télécommunications | |
| Internic.ca | Ontario |
| InterPC | Ontario |
| Interpix Design, Inc. | Ontario |
| InterPlay Creative Media, Inc. | Ontario |
| Interplex Télécom, Inc. | Quebec |
| Interpool Development | Ontario |
| Interprise Software | Ontario |
| InterQ | Ontario |
| Intersect Business Systems, Inc. | British Columbia |