Popular Wedding Industry Website The Knot Selects LimelightSITE

TEMPE, AZ – 15 December 2009 - Limelight Networks, Inc. (NASDAQ: LLNW) today announced that The Knot, the number-one online wedding portal, has selected the LimelightSITE whole-site delivery service for its content delivery network (CDN) needs. The Knot selected Limelight Networks after extensive testing showed the company’s network-based delivery platform would not only support the company’s continued growth, but also deliver the best online experience to any consumer device on any network connection.

LimelightSITE is designed to accelerate whole website delivery. For The Knot, LimelightSITE provides assurances of the highest quality content delivery without the cost of upgrading internal infrastructure, particularly as The Knot looks to expand in the coming months. Prior to making the switch to Limelight Networks, the team from The Knot laid out expectations for a smooth migration with no adverse effects on site visitors. Using Limelight Networks Integration Services, The Knot was able to meet those requirements.

“Limelight Networks brings customer service to a new level,” said Nic Di Iiorio, CTO of The Knot, Inc. “During our very aggressive project to deploy their services, Limelight personnel acted as a seamless extension of our best teams. The Limelight services team was well prepared to ensure a quick and successful project which resulted in a very smooth transition with no negative impact to our Brides.”

Safe-Harbor Statement

This press release contains forward-looking statements concerning the company's operations and use of acquired technology and intellectual property. Forward-looking statements are not guarantees and are subject to a number of risks and uncertainties that could cause actual results to differ materially including, risks associated with the integration of acquired business operations and other risks described in the company’s quarter report on Form 10Q and other periodic reports filed with the Securities and Exchange Commission. The Company assumes no duty or obligation to update or revise any forward-looking statements for any reason

About Limelight Networks, Inc.

Limelight Networks, Inc. (Nasdaq: LLNW) is trusted by the world’s most innovative enterprise, entertainment, technology, and software brands to improve the performance and profitability of web sites and end-user experiences. Our scalable, on-demand managed infrastructure solutions provide global reach and consistently high availability, by routing traffic over a private fiber-optic backbone rather than through the often-congested, unpredictable public Internet. For more information, visit our web site (http://www.limelightnetworks.com), read our blog (http://blog.llnw.com), or follow @llnw on Twitter.

Media Contact:

Paul Alfieri of Limelight Networks, Inc.
+1-917-297-4241
palfieri@llnw.com