Sierra acquires Fragment to strengthen AI customer service platform

Sierra, the AI customer service agent startup founded by Bret Taylor, announced the acquisition of Fragment, a YC-backed French startup. Financial terms were not disclosed.

Fragment builds AI tools that understand and respond to customer support questions across multiple languages and channels. By integrating Fragment's technology, Sierra can now handle customer conversations in more languages and contexts without requiring as much manual training.

For businesses using Sierra to automate their support teams, this means fewer tickets getting routed to human agents because the AI can resolve more customer issues end-to-end—directly cutting support costs and reducing response time for customers waiting for help.