Calico Commerce Earns Sun Microsystems'Endorsement for New Net Market Alliance Initiative.

Business Editors/High-Tech Writers

SAN JOSE, Calif.--(BUSINESS WIRE)--May 17, 2000

Standards-based Java(TM) Platforms are Key Enablers of Integration

Between Technologies that Meet Diverse Needs of Net Market Makers

Calico Commerce, Inc. (Nasdaq:CLIC), a leading

provider of eBusiness applications that enable companies to sell over the Web, today announced that Sun Microsystems has endorsed its vision behind the Net Markets Alliance, which was introduced at the Net Market Makers Ground Zero Conference in Boston, Mass. The vision behind Calico's Net Market Alliance pulls together the best in class applications and hardware from several different vendors to deliver a robust, standards-based solution set that covers the range of critical functionality necessary to power leading Net Marketplaces.

"Calico's vision and technical direction is aligned with Sun's strategy -- delivering highly scalable E-Commerce applications from the standards-based Java(TM) 2, Standard Edition (J2SE(TM)) and Java 2, Enterprise Edition (J2EE(TM)) platforms. Every day, more Net Marketplaces are becoming successful by building a modular eBusiness infrastructure from solutions that plug into a platform-independent Java architecture," said Shahram Moradpour, group manager, E-Commerce Market Development at Sun Microsystems, Inc. "With today's announcement, Calico and the rest of its Net Markets Alliance demonstrate how Net Market Makers can rapidly deploy solutions that can be easily customized and extended to create a competitive advantage."

"Calico has made a strategic commitment to industry-standards, exemplified by the adoption in our entire suite of applications on Sun's Java and J2EE platforms," said David Cardinal, chief technology officer, Calico Commerce, Inc. "Calico's open architecture enables Net Market Makers to spend less time on integration and more time on building feature-rich digital marketplaces, and generating revenue quickly. Calico's announcement of the Net Markets Alliance is made possible because of other technology leaders who share this common vision and have embraced Sun's Java architecture."

Calico's entire product line is built on the Lightning Architecture, providing companies selling products directly over the Web, through existing channels and in Internet markets a standards-based platform for their eBusiness strategy. The Calico product suite enables companies to rapidly deploy eBusiness solutions that accelerate revenue growth, lower operating costs, improve customer satisfaction and ultimately build competitive advantage. Sun Enterprise(TM) servers and the Solaris(TM) Operating Environment compose Calico's preferred platform for deploying its E-Commerce solutions.

About Calico Commerce, Inc.

Calico Commerce, Inc. provides an eBusiness application suite that enables leading corporations to sell products and services via the Web, through existing channels and in Net Markets. Calico's open-standards eBusiness applications match unique customer needs to products to drive revenue growth, increase customer satisfaction and achieve competitive advantage. Calico customers include leaders in high-technology hardware, manufacturing, telecommunications services, financial services, home furnishings, chemicals, agriculture and retail. Calico Commerce, Inc., headquartered in San Jose, Calif., can be found on the World Wide Web at www.calico.com.

Note to Editors: Sun, Sun Microsystems, the Sun logo, Sun Enterprise, Solaris, Java, J2SE and J2EE are all trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.

Except for the historical information contained herein, the matters discussed in news releases contain forward-looking statements that involve substantial risks and uncertainties that could cause actual results to differ materially from those expressed in or implied by such forward-looking statements. Potential risks and uncertainties are described in detail in public reports filed with the Securities and Exchange Commission such as Calico's Registration Statement on Form S-1 and on Form S-4 in connection with the ConnectInc.com acquisition.