SAN FRANCISCO - Feb. 15, 2010 - GroundWork Inc., (www.gwos.com) the leading open platform for
network, application, and cloud monitoring, announced today that it has expanded its partnership with
Neustar (NYSE: NSR), a company that enables trusted communication across networks, applications and
enterprises around the world.

Working together, GroundWork and Neustar answer the critical questions for today’s online businesses:

• Is my IT infrastructure performing at peak efficiency?
• What’s the real online experience my customers are having with my brand?
• Are my SaaS-based partners living up to service level agreements?

The integration of Webmetrics into GroundWork Monitor Enterprise gives GroundWork users the ability to
compare side-by-side dashboards for both internal and external monitoring needs.

Neustar Webmetrics allows you to:

• Externally monitor sites and applications to provide a “true view” of the end user’s experience
• Receive alerts when issues arise, so problems can be solved before customers are impacted
• View trending data and analysis via a real-time dashboard

“For GroundWork Monitor users that rely upon their websites to do business, it is important to have
both external and internal monitoring perspectives under one roof,” said David Dennis, vice president of
Marketing & Business Development at GroundWork. “When you combine Neustar Webmetrics with the
MSP features of GroundWork Monitor and the new cloud features of GroundWork Monitor Enterprise
Cloud, users that are working in industries such as e-commerce, media and online gaming can now
monitor these complex end user-facing data centers.”

“The market for online performance monitoring is exploding,” said Sophie Shiatis, vice president of
marketing at Neustar Webmetrics. “Neustar is excited to bring end-user perspective monitoring to the
GroundWork customers and prospects. The combination of network monitoring and external monitoring is extremely valuable in providing a holistic view of performance.”

Today, GroundWork has over 10,000 installations of GroundWork Monitor. In addition, the GroundWork
platform incorporates Nagios®, the most widely deployed open source monitoring platform in the world.

About GroundWork

GroundWork (http://www.gwos.com) is the leading open platform for systems and network management
software, delivering enterprise-class network, system, application, and cloud monitoring solutions at a
fraction of the cost of proprietary solutions.

GroundWork’s approach gives customers the flexibility to use diverse open source and proprietary
technologies together under a unified web services portal, allowing users to leverage the advantages of
open source while simultaneously preserving existing investments in legacy management tools.

GroundWork Monitor Enterprise Edition powers organizations in more than 50 countries, like Alexza
Pharmaceuticals, Crocs, National Australia Bank, Siemens, Travel Click and World Bank. GroundWork
Monitor Enterprise is available to monitor any environment starting at $49 USD per year.

About Neustar and Neustar Webmetrics Services

Neustar, Inc. (NYSE: NSR) provides market-leading, innovative services that enable trusted
communication across networks, applications, and enterprises around the world. Webmetrics is a Neustar
service that provides collaborative performance management services for complex web ecosystems.
Neustar Webmetrics website testing and monitoring services are used by companies to ensure online
performance, competitive advantage, and a positive end-user experience. Visit www.neustar.biz and
www.webmetrics.com for more information.