DataMirror Corporation Named To Software Magazine's 19th Annual Software 500.

Business Editors

TORONTO--(BUSINESS WIRE)--July 25, 2001

Software Magazine Recognizes DataMirror as One of World's

Leading Software Companies

DataMirror Corporation (Nasdaq:DMCX) (TSE:DMC.), a leading provider of enterprise application integration and resiliency solutions, today announced that it has been recognized for the third consecutive year in Software Magazine's annual Software 500 as one of the world's leading software companies.

"Ranking in the Software 500 further demonstrates our leadership in the EAI and resiliency software market," said Nigel Stokes, Chairman, President and CEO of DataMirror Corporation. "We are committed to helping customers integrate data across their enterprise. Over 1400 companies from across the industry spectrum use DataMirror solutions for business insight and competitive advantage. Our strong 2000 revenues and over 34% revenue growth rate from 1999 reflect the ever-increasing need for companies to find effective solutions for managing their most valuable asset, their data."

The Software 500 encompasses both public and private companies that develop business software and services and is a comprehensive look at the enterprise software landscape. The financial information for the Software 500 ranking is based on the calendar year and is gathered from Software Magazine's vendor survey, public documents and industry analysts.

"Despite all the dot-com casualties, the Internet continues to change the way we do business and software plays a critical role," says John Desmond, Software Magazine's editorial director. "The CIOs, senior IT and e-business managers who read Software Magazine value this yearly benchmark of the standing of their product and service partners. Each year as suppliers consolidate and new markets emerge, the composition of the Software 500 ranking reflects those changes."

About Software Magazine

Software Magazine reaches 72,000 CIOs and senior IT managers in mid- to large-size organizations. Editorially the magazine is focused on the top 10 business priorities of its audience as determined by leading industry research firms. The magazine is a field guide to the products and services available to help its readers create a short list of vendors to consider for solving business problems. The BPA-audited magazine has a controlled print circulation of 72,000. A complete list of this year's Software 500 financial ranking and alphabetical list can be found at www.softwaremag.com.

About DataMirror Corporation

DataMirror (Nasdaq: DMCX; TSE: DMC) delivers solutions that let customers integrate their data across their enterprises. DataMirror's comprehensive family of products unlocks the experience of now(TM) by providing advanced real-time capture, transform and flow (CTF) technology that gives customers the instant access, integration and availability they demand today across all computers in their business.

Over 1,400 companies use DataMirror to integrate their data. Real-time data drives all business. DataMirror is headquartered in Toronto, Canada, and has offices worldwide. DataMirror has been ranked in the Deloitte and Touche Fast 500 as one of the fastest growing technology companies in North America. For more information, call 1-800-362-5955 or visit the DataMirror web site at www.datamirror.com.

"Safe Harbor" Statement under the United States Private Securities Litigation Reform Act of 1995: Forward-looking statements in this press release, including statements regarding DataMirror Corporation's business which are not historical facts, are made pursuant to the "safe harbor" provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements of plans, objectives, strategies and expectations. The words "anticipate", "believe", "estimate" and "expect" and similar expressions are intended to identify forward-looking statements. Numerous important factors affect DataMirror's operating results and could cause DataMirror's actual results to differ materially from the results indicated by this press release or by any forward-looking statements made by, or on behalf of, DataMirror, and there can be no assurance that future results will meet expectations, estimates or projections. These factors include, but are not limited to, the following: variability of quarterly operating results; dependence upon on the continued growth and success of DataMirror's software products; competition; rapid technological change and new product introductions; dependence upon continued growth in the database and enterprise data integration markets; dependence upon relationships with complementary vendors and distribution channels; the ability to recruit and retain key personnel; risks of international operations, including currency exchange rate fluctuations and global economic conditions; possible software errors or defects; possible infringement claims by third parties; and other factors discussed in the Company's Annual Information Form and other periodic filings with the United States Securities and Exchange Commission and other regulatory authorities. Should one or more of these risks or uncertainties materialize, or should assumptions underlying the forward-looking statements prove incorrect, actual results may vary materially from those indicated in any forward-looking statements. The Company disclaims and does not assume any obligation to update these forward-looking statements.

Copyright 2001 DataMirror Corporation. All rights reserved. DataMirror, Transformation Server and The experience of now are trademarks or registered trademarks of DataMirror Corporation. All other brand or product names are trademarks or registered trademarks of their respective companies.