Sierra, the AI customer service agent startup co-founded by Bret Taylor, announced on Thursday, April 23, 2026, that it has acquired Fragment, a French startup backed by Y Combinator that helps businesses integrate AI into workflows.
The acquisition marks Sierra’s third public deal in 2026. The company previously announced two other acquisitions in late March: Opera Tech, a Japan-based enterprise AI solutions company, and Receptive AI, a voice agent company. Fragment co-founders Olivier Moindrot and Guillaume Genthial will join the Sierra team. Financial terms were not disclosed. PitchBook estimates Fragment raised approximately $2 million through its seed round.
In a blog post, Taylor and his co-founder Clay Bavor said Moindrot and Genthial 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 funding from investors including Sequoia and Benchmark, giving it a reported valuation of $10 billion.
The acquisition of Fragment, with its French roots and focus on AI workflow integration, suggests Sierra may be expanding its operational presence in Europe.
Source: TechCrunch