In Forrester's inaugural evaluation of online testing vendors, we researched eight companies across 82 criteria. We found that Adobe and Autonomy lead the pack because of their consistent strength across the full range of capabilities and their support for integration with the Web marketing ecosystem. They are followed by a diverse group of Strong Performers: Amadesa with a broad optimization offering, Maxymiser with its services-centric delivery model, SiteSpect with its tagless technical approach, Vertster with its focus on self-service, and Webtrends with a new and modern user interface. Finally, Google, a Contender in our evaluation, offers a solid basic product offering that is free to all users.