Sierra, the customer service AI startup co-founded by Bret Taylor, announced on Thursday, April 24, 2026, that it has acquired Fragment, a Y Combinator-backed French startup that helps businesses integrate AI into their workflows.
The deal marks Sierra’s third publicly announced acquisition. The company previously purchased Japan-based enterprise AI firm Opera Tech and voice agent company Receptive AI, both announced in late March 2026. Financial terms of the Fragment acquisition were not disclosed. PitchBook estimates Fragment had raised approximately $2 million through its seed round.
Fragment co-founders Olivier Moindrot and Guillaume Genthial will join the Sierra team. In a blog post, Taylor and Sierra co-founder Clay Bavor said the pair will bring “valuable strength” to Sierra’s “agent development efforts in France.”
Taylor co-founded Sierra alongside Bavor, a Google alum, after stepping down as co-CEO of Salesforce in early 2023. Taylor also serves as chairman of the board at OpenAI. Sierra counts Casper, Clear, and Brex among its customers and has raised more than $630 million in total funding from investors including Sequoia and Benchmark, giving it a reported valuation of $10 billion.
The acquisition suggests Sierra may be expanding its presence in Europe, with Fragment’s French founders positioned to support that regional push.
Source: TechCrunch