Press Release

FOR IMMEDIATE RELEASE

MEDIAPLEX AND OTP SOFTWARE TEAM UP TO IMPLEMENT MEDIAPLEX'S MOJO TECHNOLOGY FOR E-COMMERCE CUSTOMERS

SAN FRANCISCO, September 27, 1999 - Mediaplex, Inc., a leading eBusiness marketing and technology company, and OTP Software, Inc., a leading IT integration organization, today announced that they have joined forces to promote Mediaplex's proprietary mobile Java objects technology, MOJO, to help e-commerce companies optimize Internet advertising by using corporate business data to deliver more effective sales and brand-building messages in real time.

OTP Software develops, implements and administers packaged Enterprise Planning Resources (ERP), Customer Relationship Management (CRM) and e-commerce applications, databases and Internet-based information systems. Mediaplex provides a full range of online advertising services from strategic media planning to ad serving to tracking and analysis. In addition, the Company now offers an exclusive capability which enables advertisers to integrate enterprise information, such as product pricing and availability, with online advertising in real time to increase their return on advertising expenditures.

"We are extremely pleased to have OTP Software as one of our key system integrators," said Ken Kucera, Medipalex's vice president of strategic business development. "OTP's expertise in the integration of enterprise systems such as Oracle, J.D. Edwards OneWorld, SAP, PeopleSoft, and BAAN Subsystems applications, combined with Mediaplex's exclusive MOJO technology, will help our joint e-commerce businesses maximize their online advertising investments."

Mediaplex's MOJO technology uses sophisticated customer profiling, ROI analysis and key product information to adjust and optimize Internet advertising campaigns without altering or compromising a company's business system. Based on predetermined guidelines regarding the campaign's target customer profiles and actual business data such as inventory and pricing, Mediaplex's MOJO technology can be used to automatically modify advertisements in real time to deliver the most relevant message to a specific Web site visitor. This technology was designed to improve the effectiveness of online ad messages in order to increase the number of click-throughs and conversions for an advertising campaign.

"We are very excited about the A to Z Internet selling solution that the OTP and Mediaplex partnership can offer e-commerce businesses," said Peter Liljegren, OTP Sofware's managing partner. "With Mediaplex's MOJO solution, online advertising initiatives can be seamlessly integrated with our enterprise systems in real time, allowing our customers to optimize their online advertising programs and their investments in enterprise information. We believe that the overall combination of our integration and support services with Mediaplex's experience in online advertising, as well as its MOJO technology, enables varied and rapid application deployments for our customers."

Along with Mediaplex's MOJO solution, OTP will provide "out-of-the-box" and custom interfaces as well as configuration services that couple MOJO with proven front office e-sales systems and back-end ERP systems from Oracle.

Companies interested in learning more about the joint Mediaplex and OTP Software solution should contact Ken Kucera at 415.808.1960.


About OTP Software
OTP Software, Inc., a member of the OTP Group, develops, implements and administers packaged ERP, CRM, and E-Commerce applications, databases, and internet- based information systems. The company's competencies include the delivery of functional and technical solutions as well as the development, implementation and support of EAI products. OTP Software's rapidly growing consulting practice has over 120 consultants and eight business development professionals based out of offices in the San Francisco Bay Area, Southern California and New York City. The company's primary architectural platforms include Oracle, SUN and IBM. To accelerate access to leading edge technologies, OTP Software builds strategic relationships with "high potential" private companies and Internet start-ups. Founded more than 10 years ago, OTP Group is an IT management, implementation and product development firm. For more information please call toll free, 1-877-324-4700 or email, amigo@otpsoft.com

About Mediaplex
Mediaplex (www.mediaplex.com) is a leading provider of eBusiness marketing and technology solutions that enable companies to optimize Internet advertising for sales, direct marketing and brand building. Mediaplex's proprietary technology platform delivers real-time advertising messaging based on enterprise information. In addition, Mediaplex provides comprehensive online campaign services. Mediaplex clients include DATEK Online Brokerage Services, Corp., OfficeMax, ShopNow.com, Strong Funds, and advertising agencies including McCann-Erickson and Publicis & Hal Riney using Mediaplex's services on behalf of their clients such as Hewlett-Packard, Siebel Systems, Silicon Graphics, Inc., and Sprint PCS. Mediaplex is headquartered in San Francisco, with offices in New York, the Silicon Valley and Hamburg, Germany. Mediaplex anticipates opening offices in London, Paris, Stockholm and Tokyo later this year. Mediaplex can be contacted at 415.808.1900.