ATLANTA, GA – (July 10, 2008) – Internap Network Services Corporation (NASDAQ: INAP), a global provider of end-to-end Internet business solutions, announced today its Performance IP™ network and data center colocation services are being used by OpSource™, the leader in Web operations, to power their Software-as-a-Service (SaaS) delivery solutions and European expansion. The Internap services support OpSource’s comprehensive Web operations solution including OpSource On-Demand™, OpSource Billing™, and OpSource Connect™ as well as the company’s growing business in Europe.

OpSource delivers SaaS and Web applications for on-demand businesses worldwide. The company’s global customer growth and geographic expansion in Europe presented an opportunity to expand the services provided by Internap. OpSource originally used Internap’s Performance IP network services as part of the global delivery of its Web operations solution. To meet rising demand from SaaS and Web 2.0 companies in Europe, as well as demand from U.S.-based customers for higher levels of support in Europe, OpSource selected Internap’s London data center to ensure the most dependable and reliable application delivery and network connectivity.

“OpSource needed a reliable network solution to power its applications and a global data center platform to support our growth in Europe. We found both in Internap,” said Don Barlow, senior vice president of operation for OpSource. “Internap’s 100 percent performance service level agreement (SLA) and focus on superior customer service fits perfectly with OpSource’s 100 percent uptime guarantee and 24x7 customer support.”

Internap’s data center colocation and Performance IP network offer businesses a unique, seamlessly integrated, and highly reliable technology infrastructure to run their most demanding and mission critical applications and Web sites. These solutions are based on Internap’s patented MIRO (Managed Internet Routing OptimizerTM) technology and a global network of Private Network Access Points (PNAPs) and enterprise-quality data centers. Internap services are backed by an industry-leading 100 percent uptime service level agreement (SLA). The result is Internap customers like OpSource can provide superior service to their customers for even the most demanding Internet applications.

“Software-as-a-Service or SaaS is one of the most significant developments in the IT industry in the last 10 years and OpSource is at the forefront of this new software delivery model,” said James P. DeBlasio, chief executive officer at Internap. “OpSource provides its customers a turn-key application solution to turn software into a billable service and Internap provides a turn-key network and data center solution to power OpSource.”

About OpSource
OpSource™ delivers Software-as-a-Service (SaaS) and Web applications for on-demand companies, with hundreds of applications, millions of users and billions of transactions supported daily. OpSource On-Demand™, the leading Web operations solution, is defining how Web-based software is delivered. By choosing OpSource as their Web application delivery partner, companies are freed from investing in and managing the complex and costly infrastructure and services necessary to deliver applications over the Web. They can instead focus their resources on developing, marketing and selling their applications and services. Further, by using OpSource Connect™ companies can leverage Web services such as OpSource Billing™, OpSource Analytics™ and OpSource End-User Support™ and integrate their applications with other SaaS applications over the Internet as well as with enterprise applications behind the corporate firewall. OpSource On-Demand is suitable for companies at any stage of growth, with any type of on-demand application. OpSource is the only company to offer Success-Based PricingSM, a unit-based pricing model that allows businesses to begin with a modest minimum commitment and scale expenses as revenues increase.

Headquartered in Santa Clara, CA, OpSource has Web application delivery centers in Virginia, London and Bangalore. For more information about OpSource, visit www.opsource.net.

OpSource, OpSource On-Demand and the OpSource logo are trademarks of OpSource, Inc. Success-Based Pricing is a service mark of OpSource, Inc. All other trademarks and company names mentioned are protected by their respective owners.

About Internap
Internap is a leading Internet solutions company that provides The Ultimate Online Experience™ by managing, delivering and distributing applications and content with unsurpassed performance and reliability. With a global platform of data centers, managed Internet services, a content delivery network (CDN) and content monetization services, Internap frees its customers to innovate their business and create new revenue opportunities. More than 3,000 companies across the globe trust Internap to help them achieve their Internet business goals. For more information, visit www.internap.com.

Internap “Safe Harbor” Statement
Certain information included in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, including, among others, statements regarding the performance of our products, business strategy, projected levels of growth, and projected costs, are forward-looking statements. Those statements include statements regarding the intent, belief or current expectations of Internap and members of our management team, as well as the assumptions on which such statements are based. Forward-looking statements are not guarantees of future performance and involve risks and uncertainties that actual results may differ materially from those contemplated by forward-looking statements. Other important factors that may affect Internap's business, products, results of operations and financial condition include, but are not limited to: our ability to sustain profitability; our ability to respond successfully to technological change; the availability of services from Internet network service providers or network service providers providing network access loops and local loops on favorable terms, or at all; failure of third party suppliers to deliver their products and services on favorable terms, or at all; failures in our network operations centers, network access points or computer systems; the ability to successfully integrate the operations of Internap and VitalStream Holdings, Inc.; and our ability to protect our intellectual property.

Our Annual Report on Form 10-K/A, subsequent Quarterly Reports on Form 10-Q, recent Current Reports on Form 8-K and other Securities and Exchange Commission filings discuss the foregoing risks, as well as other important risk factors that could contribute to such differences or otherwise affect our business, results of operations and financial condition. We undertake no obligation to revise or update any forward-looking statement for any reason.