| Dal Innovates | Nova Scotia |
| DAlberts Computer Consultation Services | British Columbia |
| DalCor Pharmaceuticals | |
| Daleena Technologies, Inc. | Ontario |
| Dalen Design | |
| Daley Progress, Inc. | Nova Scotia |
| Dalhousie University | Nova Scotia |
| Dalhousie University - Department of Mathematics and Statistics | Nova Scotia |
| Dalhousie University - Faculty of Computer Science | Nova Scotia |
| Dalhousie University - Institute for Big Data Analytics | Nova Scotia |
| Dali Wireless (Canada), Inc. | British Columbia |
| Dalian Enterprises, Inc. | Ontario |
| Dalikoo | Ontario |
| Dallmann Computers | Alberta |
| Dalriada Drug Discovery | Ontario |
| DAM IT Comuting | |
| Dan Bader | British Columbia |
| Dan Bobyn Engineering Ltd | Alberta |
| Dan Eagleton | Ontario |
| Dana TM4, Inc. | |
| Danavation Technologies Corporation | Ontario |
| Dandelion Digital | Nova Scotia |
| Dandelion Web Design | Ontario |
| Dandly, Inc. | |
| Danesh Electronics | Quebec |
| Danger Dynamite | |
| Dani Master | Quebec |
| Danic Technology, Inc. | Ontario |
| Daniel Ferkul | Ontario |
| Daniel James Media | |
| Daniel Lemire | Quebec |
| Daniel Litt | |
| Daniel R. Shea & Associates Systems Group, Inc. | Ontario |
| DANIMA Technologies, Inc. | Ontario |
| Danmax | Northwest Territories |
| Danny Kronstrom | Quebec |
| Danory Digital Consulting | |
| Danslenuage.quebec | Quebec |
| Dantech | Quebec |
| Dapasoft | Ontario |
| DAPL Accounting Systems, Inc. | Ontario |
| dapphaus | |
| Dara Skolnick | Ontario |
| Darby Sieben | Alberta |
| Dare Instruments, Inc. | Alberta |
| Daring Eagle | |
| DARIT Technologies | |
| Dark Horse Communications | Saskatchewan |
| Dark Horse Consulting | Ontario |
| Darkhorse Analytics | Alberta |