Sierra's website includes a 'Chat With Us' feature that may connect shoppers to an automated virtual assistant, though Sierra has not publicly confirmed whether the system is AI-powered, rule-based, or staffed by human agents. The nature of the chat system cannot be determined from Sierra's public-facing website or any official disclosure.

The chat feature appears in sierra.com's customer service section and is triggered through JavaScript, a common technical pattern for third-party chat platforms. No chat platform vendor was identifiable from the site's publicly accessible code. A third-party consumer review site, PissedConsumer, characterizes the feature as a 'virtual assistant,' but this label may reflect that site's own generic categorization rather than confirmed technical detail. Sierra itself does not describe the feature's underlying technology in any public-facing documentation found.