Sierra acquires YC-backed AI startup Fragment

Sierra, the customer service AI startup founded by Bret Taylor, has acquired Fragment, a YC-backed French startup that helps businesses integrate AI into workflows. This is Sierra's third public acquisition, following the purchases of Opera Tech and Receptive AI in late March. Fragment co-founders Olivier Moindrot and Guillaume Genthial will join Sierra's team, bringing strength to its agent development efforts in France. Terms were not disclosed; PitchBook estimates Fragment raised around $2 million in seed funding. Taylor, also OpenAI's chairman, co-founded Sierra with Clay Bavor after leaving Salesforce in early 2023. The startup counts Casper, Clear, and Brex as customers, has raised over $630 million from investors including Sequoia and Benchmark, and is valued at $10 billion.