Akamai Expands Relationship with Yahoo! to Enable Customized Ad Delivery

Contacts:
Jeff Young Media Relations Akamai Technologies 617.444.3913 jyoung@akamai.com	--or--	Shannon Altimari Investor Relations Akamai Technologies 617.250.4772 saltimar@akamai.com

Yahoo! continues use of Akamai's scalable content delivery and traffic management services to support global audience growth

CAMBRIDGE, MA, June 27, 2001 - Akamai Technologies, Inc. (Nasdaq: AKAM), the leading provider of distributed application and content delivery services, today announced that Yahoo! Inc. (Nasdaq: YHOO) has extended its service agreement to include Akamai's IP characterization service.

Yahoo!, which has been working with Akamai since early 1999 as a charter customer to optimize delivery of content across the Internet, will take advantage of the Akamai EdgeScape^SM service to enhance Yahoo!'s customized ad serving capabilities. Yahoo!'s ad servers will integrate the Akamai EdgeScape data into its ad serving applications to increase advertising relevance. By providing more effective targeting, Yahoo! continues to enhance its ability to deliver greater value to its clients.

"Yahoo! sets a standard for providing end-users and advertisers the most relevant, personalized and valuable content, in addition to operating one of the most reliable, high-performance sites on the Web, and Akamai is committed to supporting Yahoo! to achieve the best results possible," said Paul Sagan, president of Akamai. "Akamai's EdgeScape characterization service is well-positioned to complement Yahoo!'s innovative approach to meeting the needs of its large client base. We're pleased to be playing a part in Yahoo!'s successful business by providing the intelligence for creating a more exact match between relevant content and users' needs."

"Akamai continues to remain a valued service provider and technology development partner to Yahoo!," said Farzad Nazem, Yahoo!'s chief technology officer. "Akamai's leading-edge services assist us with the performance of our Web properties worldwide, and by adding the unique business intelligence provided by the EdgeScape data, our ad serving and content targeting capabilities will continue to be enhanced."

Akamai's EdgeScape service enables Yahoo! to provide its advertisers with a set of comprehensive reports measuring the effectiveness of individual ad campaigns. For advertisers, this becomes a tangible measurement tool to analyze gross demographic patterns, as well as bandwidth characterization data that becomes invaluable for targeting ads.

Without compromising users' privacy, Akamai correlates geographic and network information to IP addresses, enabling the customization of relevant content. Akamai's integrated service offerings enable the delivery of customized, dynamic content through the construction of Web pages from -component pieces that can be targeted and delivered from locations optimized for each end user. Akamai's content targeting functionality is easily implemented and the data is automatically and continuously updated, ensuring that customers always have access to accurate, up-to-date information. Akamai also leverages relationships with more than 650 network partners to continually enhance the EdgeScape database.

In addition to Akamai's IP characterization service, Yahoo! will continue to work with Akamai for the scalable and reliable delivery of Web content on a global basis, extending its commitment to use Akamai's content delivery and global traffic management services.

About Akamai
Akamai is the leading provider of distributed application and content delivery services. These services enable companies to reduce the complexity and cost of deploying and operating a uniform Web infrastructure while ensuring unmatched performance, reliability, scalability and manageability. Akamai's services give businesses a distinct competitive advantage and provide an unparalleled Internet experience for their customers. Akamai's intelligent edge platform for content, streaming media, and application delivery comprises more than 9,700 servers within 650 networks in more than 56 countries. With headquarters in Cambridge, Massachusetts, Akamai provides services to more than 1,400 companies worldwide. For information on Delivering a Better Internet^SM, visit www.akamai.com.

Akamai Statement Under the Private Securities Litigation Reform Act
The release contains information about future expectations, plans and prospects of Akamai's management that constitute forward-looking statements for purposes of the safe harbor provisions under The Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those indicated by these forward-looking statements as a result of various important factors including, but not limited to, the dependence on Akamai's Internet content delivery service, a failure of its network infrastructure, the complexity of its service and the networks on which the service is deployed, the failure to obtain access to transmission capacity and other factors that are discussed in the Company's Annual Report on Form 10-K and other documents periodically filed with the SEC.