iBasis Names Executive To Drive Mergers and Acquisitions, Strategic Investments and Partnerships

Rapidly Growing Internet-based Communications Service Provider Appoints D.J. Long Vice President of Corporate Development

BURLINGTON, Mass., August 28, 2000-iBasis, Inc. (Nasdaq: IBAS), the leader in advanced Internet-based communications, today announced that it has appointed D.J. Long as vice president of Corporate Development. Long will help iBasis continue its rapid growth by identifying and evaluating new opportunities to expand the company's portfolio of next generation, IP-based communications services through mergers and acquisitions and other strategic ventures.

Prior to joining iBasis, Long served as senior vice president of Business Development at i2i, Inc., a business-to-business, ecommerce start-up. Long also led merger and acquisition activity as director of Business Development at Avid Technology, Inc., a leading provider of digital audio and video tools for information and entertainment applications.

"Moving forward, D.J. will spearhead our investment efforts as we seek compelling new IP-based services such as voice-enabled Internet access, content delivery to mobile devices, conferencing, and other advanced telephony services," said Ofer Gneezy, president and CEO of iBasis, Inc. "D.J.'s extensive industry knowledge and proven success in identifying promising strategic investments will enable us to move quickly and capitalize on opportunities to further leverage our carrier-class global IP infrastructure, expand our addressable market and increase service margins."

Long brings 20 years of high tech merger and acquisition and business development experience to iBasis. At Avid Technology, where he was responsible for mergers and acquisitions, strategic partnerships, investments and joint development agreements, Long led the company's successful acquisition of Microsoft's Softimage subsidiary and established and managed the company's strong strategic relationships with Intel, IBM, Sony, Silicon Graphics, Microsoft and others. Prior to Avid, Long held marketing and sales positions at Lotus Development Corporation and Prime Computer, Inc. Long also held senior marketing positions at Servicesoft Corporation and Applix, Inc. Long holds a B.S. in Finance from Boston College.

About iBasis
Founded in 1996, iBasis (Nasdaq: IBAS) is the leader in advanced Internet-based communications. iBasis has built the world's first global IP network that delivers toll quality voice and fax service and other advanced hosted communications solutions, including VoCore, to global tier one carriers and other service providers. The iBasis Network™ is the world's largest international Cisco Powered Network™ for Internet telephony. More than 95 international carriers are iBasis customers, including 11 of the top 12 US international carriers. iBasis is listed in both the Russell 2000® and Russell 3000® Indexes. The company can be reached at its worldwide headquarters in Burlington, Mass., USA at 781-505-7500 or on the Internet at www.ibasis.net.

Except for historical information, all of the expectations, projections and assumptions contained in the foregoing press release constitute forward-looking statements under the Private Securities Litigation Reform Act of 1995 and involve risks and uncertainties. Important factors that could cause actual results to differ materially from such forward-looking statements include, but are not limited to, the considerations described as "Risk Factors" in iBasis' prospectuses dated March 9, 2000, and the company's other SEC filings.