| Pronine Electronics Design | British Columbia |
| Pronk Graphics | Ontario |
| ProntoForms Corporation | Ontario |
| Proof Data Technology | Yukon |
| Propaganda Design | Quebec |
| Propaganda Haus | British Columbia |
| Propage | Quebec |
| Propel | New Brunswick |
| Propel Guru | |
| Propel Holdings | |
| Propel Holdings, Inc. | |
| Propel Internet Marketing | Ontario |
| Propel Solutions Ltd | |
| Propel Technology Solutions | |
| Propelion Internet Solutions, Inc. | Quebec |
| Proper | Ontario |
| ProperSoft | Ontario |
| Property Vista Software, Inc. | |
| Propertybase | |
| Propet Software, Inc. | |
| Propheo | Quebec |
| Prophet Business Group | Manitoba |
| Prophetic Software | Quebec |
| Prophix | Ontario |
| Propmedia | British Columbia |
| Proposify, Inc. | Nova Scotia |
| Proprio Expert | |
| Proptech Collective | |
| Propulia Capital | |
| Propulsion Québec | Quebec |
| Propulsion technologies, Inc. | |
| PropulsionPME | Quebec |
| Propulso | |
| Propulsoft | |
| Prosar | Ontario |
| ProServeIT | |
| ProShop | British Columbia |
| Prositeweb, Inc. | Quebec |
| ProSoft Solutions, Inc. | British Columbia |
| ProSoftXP | Ontario |
| Prospect | |
| Prospection, Inc. | Quebec |
| Prospects Software, Inc. | Quebec |
| Prospek | Quebec |
| Prospre Nutrition, Inc. | |
| Protegra | Manitoba |
| Protegra, Inc. | |
| Protein Industries Canada | Saskatchewan |
| ProteinQure, Inc. | |
| Protelcom | Quebec |