Two startups next week will unveil World Wide Web site tracking and monitoring software that offers customization and real-time access.

Andromedia Inc.'s Aria World Wide Web Recording and Reporting Systems, due to ship next month, enables administrators to capture detailed information about their Web server and deliver statistics to users.

WebThreads, based in Vienna, Va., will ship its namesake product, which can also capture information about visitors to a Web site. WebThreads also enables site managers to track in real time where a user is traveling within a site, and to customize the Web site on the fly.

Andromedia's Aria components bypass traditional Web server log files. Aria.monitor replaces the log file, turning incoming information into C++ objects that can be fed to Aria.recorder. It in turn passes the object to Aria.API and Aria.store; which writ the objects to disk and store them in the cache memory for real-time access, respectively.

Aria.API processes collected objects into six categories, such as domain or content information. Administrators can add categories as well. Aria.reporter taps Aria.store to generate the reports and to deliver the information to users through a Web browser, said officials.

WebThreads allows administrators to customize a Web site on the fly based on the information collected about a specific user.

WebThreads issues a user a Thread ID and attaches itself to a user's browser. From there, WebThreads, which runs as a Common Gateway Interface program, tracks the movements of the specific users to determine areas of interest and customize the site.

For example, after a user clocks three times on hyperlinks about a specific topic, a WebThreads script would automatically change the site to provide him or her with more targeted information.

Pricing for the Aria system starts at $1,800; pricing for WebThreads starts at $895.