MARINA DEL REY, Calif.–(BUSINESS WIRE)–Aug. 18, 2003–

— BA Venture Partners Leads Round, Sierra Ventures

Returns as Investor —

— Funds Earmarked for International Expansion and

Additional Data Centers–

FrontBridge Technologies Inc., a market-leading provider of email security and message management services, today announced it has closed an $8 million Series C round of funding. Outpacing even the rising demand for email security services, FrontBridge has generated revenue growth of more than 700 percent on a year over year basis. In order to capitalize on the enormous demand for its services, FrontBridge will use the new funds to significantly expand its addressable market by scaling both international and domestic sales, as well as opening additional data centers. This oversubscribed round was led by BA Venture Partners, with a follow on investment by Sierra Ventures, the lead in the company’s December 2002 Series B round.

“BA Venture Partners has had a great deal of success working with subscription-based service businesses, and FrontBridge fits our strategy of investing in high-growth companies with this proven business model,” said Rory O’Driscoll, managing director of BA Venture Partners. “Corporate IT departments don’t want more boxes to manage, which is why managed services are becoming so popular in the email security space. FrontBridge represents a compelling investment because email filtering is becoming a requirement for corporations as spam and email-borne viruses detract from the effectiveness of email as a tool for communication.”

Contributing to the growing demand for FrontBridge services is the relentless proliferation of spam. Spam is a business burden that grows more severe on a daily basis, clogging email servers, consuming network bandwidth, diverting valuable IT resources, and costing enterprises millions of dollars annually in lost productivity. Today, FrontBridge estimates that more than 65 percent of all email is spam, representing an alarming rise from the 16 percent spam rate seen in January 2002. Moreover, spammers have become more sophisticated over the past 18 months by creating multiple ways to bypass corporate security measures.

In order to combat this enormous problem, FrontBridge employs several unique spam filtering techniques, including custom blacklists, proprietary fingerprinting, and adaptive, rules-based scoring. The FrontBridge TrueProtect(TM) service not only eliminates up to 95 percent of spam, but also offers an unmatched “false positive guarantee,” assuring less than one in a million legitimate messages may be mistaken for spam. Moreover, FrontBridge leads the industry in reliability, having experienced zero downtime on its network since service inception in 2001. As a result, FrontBridge is the only vendor that can also guarantee 99.999 percent up time and ensure message delivery.

This powerful value proposition is reflected by the hundreds of recently signed customers who rely on FrontBridge to keep their employees’ inboxes clean. Some of these market-leading customers include Sony, Toshiba, Harman, LPL Financial, Meredith and Sybase. FrontBridge now provides security and protection services for more than 2,500 email domains globally. This dramatic increase in market penetration during the past six months was one of the primary reasons returning investor Sierra Ventures chose to participate in this round.

According to Jeff Drazan, general partner at Sierra Ventures, “Since our initial investment, FrontBridge has achieved or exceeded all of its business milestones. Given the accelerating customer adoption we’ve recently seen, we definitely wanted to maintain our position by investing in this round.”

In addition to supporting sales, marketing and research and development, the funding allows FrontBridge to open additional data centers, including a London-based data center that will further enhance FrontBridge’s protection against globally distributed spamming ploys.

According to Steve Jillings, president and chief executive officer of FrontBridge, “In a market evolving as rapidly as email security, FrontBridge has the model, the infrastructure, the technology and the domain expertise necessary to stay ahead of the competition. As a result, we’re capturing market share, as well as delivering valuable services and immediate cost savings to a rapidly growing customer base. This new funding enables us to aggressively scale the company in the second half of this year.”

About BA Venture Partners

BA Venture Partners, a venture capital partnership, leads start-up to expansion stage investments in networking, semiconductor, software, medical technology and biotechnology companies. The firm closed BA Venture Partners VI, a $500 million fund, in 2000. BA Venture Partners’ sole limited partner is Bank of America. Visit their Web site at www.BAVenturePartners.com.

About Sierra Ventures

Sierra Ventures is a $1 billion venture capital organization headquartered at 2884 Sand Hill Road in Menlo Park, California (www.sierraventures.com). The firm invests in early stage and emerging growth technology companies with a special focus in three areas: networking and telecommunications, mission critical enterprise software and Internet infrastructure. Since its founding in 1982, Sierra Ventures has successfully invested in numerous early stage technology companies including ConvergeNet (purchased by Dell), Evolve Software (Nasdaq:EVLV), Intuit (Nasdaq:INTU, MicroMuse (Nasdaq:MUSE), OnLink (purchased by Siebel), Quinta (purchased by Seagate), StrataCom (purchased by Cisco), and Vina Technology (Nasdaq:VINA).

About FrontBridge Technologies

FrontBridge Technologies, Inc. is the market-leading provider of enterprise-class email security and message management services. FrontBridge TrueProtect Message Management Suite protects corporations from spam, viruses, and malicious email-borne attacks with unmatched security, performance, and reliability. FrontBridge offers the industry’s most comprehensive service level guarantees, including guaranteed uptime of 99.999 percent and guaranteed messaged delivery. Now in its fourth year of operation, FrontBridge manages email security for over 2,500 corporate email domains globally and is headquartered in Marina del Rey, Calif. Visit us on the Web at www.frontbridge.com or call 877-301-8232.