Companies Team Together to Meet Communication Demands of Small and Mid-Sized Businesses Worldwide

SAN FRANCISCO and BOSTON (April 17, 2000) - Critical Path, Inc. (Nasdaq: CPTH), the dominant global provider of business-to-business Internet messaging and collaboration solutions, and Intranets.com, an idealab! venture and developer of the world's first free intranet portals, today announced a multi-year agreement under which Critical Path will provide advanced Web-based email services to Intranets.com, allowing Intranets.com to offer superior Internet messaging to business users worldwide.

Effective communication and collaboration is the lifeblood of doing business in today's global environment with intranets and email are rapidly becoming the glue that binds businesses together. Intranets.com offers this communication convenience to small- and medium-size businesses and organizations. Intranets.com's free intranet solution provides users with reliable, secure communication and collaboration tools that are accessible anywhere, anytime. As part of its commitment to meet the needs of its users, Intranets.com will now offer hosted email from Critical Path.

"Providing scalable and secure Web-based email to businesses worldwide is a key component of Intranets.com's product strategy of empowering our customers with improved communication and collaboration," said Karen Leavitt, director of product marketing, Intranets.com. "Critical Path's advanced Internet messaging solutions enable our customers to focus on their core business with the confidence of knowing their communication and collaboration needs are met securely and reliably by an industry leader."

With nearly 200,000 businesses and organizations already signed up for the service, Intranets.com's user base is expected to grow dramatically as the company moves into the fast growing Asian and European markets. Critical Path's ability to provide localized support, coupled with its strong overseas presence will play a key role in addressing the communication and collaboration needs of businesses worldwide.

"Email is the most vital form of communication that businesses use today, surpassing even the telephone," said Dave Thatcher, president of Critical Path. "In order to compete on a global scale, a company needs to have complete confidence that its email is secure and can scale to meet the demands of its users. As the brand-behind -the-brand, Critical Path provides Intranets.com with the most advanced Internet message solutions available, enabling their customers to leverage the power of the Internet for improved communication and collaboration." About Intranets.com

Intranets.com delivers the world's first free intranet portals for small and medium-sized businesses and organizations. With free hosting and custom URLs for all organizations, Intranets.com provides users with everything they need at their fingertips -- from must-have collaboration applications to industry news, to vendor services. Intranets.com helps thousands of organizations worldwide improve collaboration and increase efficiencies. Privately-held Intranets.com is one of the most recent businesses to spawn from idealab!, the nation's leading Internet incubator. Intranets.com is based in Woburn, Massachusetts with European headquarters in the Netherlands. For more information, visit www.intranets.com, e-mail webmaster@intranets.com, or call 888-932-2600 or 781-932-0960.

About Critical Path, Inc.
Critical Path, Inc. (Nasdaq: CPTH) is the dominant global provider of complete end-to-end Internet messaging and collaboration solutions for wireless, Internet-centric, telecommunication and corporate businesses. Through its allsourcing strategy, Critical Path is the only advanced messaging provider to offer businesses the flexibility to outsource, midsource or insource all or part of their messaging and collaboration applications. Critical Path has built an industry-leading global infrastructure with data centers connected to key Internet exchange points. Critical Path's technology currently reaches more than 55 million end-users through its customer relationships and more than 20 million wireless devices. Critical Path provides reliable, secure, and scalable e-mail and a flexible suite of enhanced messaging services to partners such as E*TRADE, CompuServe, Network Solutions, U S West, Sprint, France Telecom, British Telecommunications, and ICQ. Critical Path is headquartered in San Francisco, with offices in locations nationwide and in Germany, England, Ireland, France, Denmark, Italy, Switzerland, Brazil and Argentina. More information on Critical Path can be found at www.cp.net.

About Intranets.com
Intranets.com is the world's leading provider of on-demand collaboration services for small businesses or departments and groups inside large organizations. The company serves more than 350,000 users across 10,000 companies worldwide and offers a secure, web-based collaboration suite to share critical business information quickly and easily at any time from anywhere. Privately held and profitable, Intranets.com is led by an experienced team of software industry professionals who are committed to providing a secure, customizable, easy-to-deploy intranet solution supported by world-class customer service. Intranets.com is a PC Magazine "Editor's Choice" winner and is rated one of the world's "Top 25" leading service providers by ASPNews. The company has also been ranked by the Boston Business Journal as one of the fastest growing private companies in Massachusetts for two consecutive years. For more information or to take a FREE 30-day test drive, visit http://www.intranets.com/pr, e-mail corpsales@intranets.com or call 888-932-2600 or 781-565-6000.

About idealab!
idealab! (www.idealab.com ) identifies, creates and operates Internet businesses. Founded in March 1996 by Bill Gross, idealab! currently has approximately 50 businesses in various stages of development. idealab! generates ideas for new Internet businesses and creates, capitalizes and operates a separate company to conduct each new business. Actively participating in the on-going operations of its network companies through board representation, information sharing and facilitating collaboration among the companies, idealab! also recruits management to oversee the day-to-day operations allowing senior management to concentrate on executing the business plan. Additionally, idealab! provides each operating company with a full range of operational support services including office space and the accompanying network infrastructure, technology, graphic design, marketing, competitive research, legal, accounting and business development services. idealab! public companies include eToys (Nasdaq: ETYS), GoTo.com (Nasdaq: GOTO), CitySearch (TMCS), NetZero (Nasdaq: NZRO) and Tickets.com (Nasdaq: TIXX).

Critical Path is a service mark and the Critical Path logo is a trademark of Critical Path, Inc.

The statements in this press release relating to matters that are not historical are forward-looking statements. Actual results could differ materially from these forward-looking statements. Risks and uncertainties facing Critical Path are described in its prospectus dated June 1, 1999 and with its periodic filings with the Securities and Exchange Commission (www.sec.gov).

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Press Contact:

Colin Smith
Director of Public Relations
408.566.5694

For Reporters and Analysts:
Tom Birkeland
(415) 808-8773
tbirkeland@cp.net


For Investors:
Stefanie Elkins
(415) 344-5503
selkins@cp.net

Intranets.com is a trademark of Intranets.com, Inc. idealab! is a registered trademark of idealab!, Inc. Inc.com and Click of Approval are trademarks of the Goldhirsh Group, Inc. Other product and company names herein may be trademarks of their respective owners.