<Page> EXHIBIT 8.1 SUBSIDIARIES <Table> -------------------- SAND TECHNOLOGY INC. CANADA -------------------- | | | ------------------------------------------ 100% | 100% | 100% | | | | | | | --------------- ------------------- --------------- SAND TECHNOLOGY SAND TECHNOLOGY CORPORATION STSI LICENSING, LLC. IRELAND LIMITED DELAWARE NEW JERSEY IRELAND --------------- ------------------- --------------- | | | --------------------- | | 100% | | 100% | | --------------- ----------------------- SAND TECHNOLOGY SAND DEUTSCHLAND TECHNOLOGY GmbH LIMITED Germany (England) --------------- ----------------------- </Table>