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Sierra Acquires YC-Backed AI Startup Fragment for Customer Service

Sierra has acquired Fragment, a Y Combinator-backed French AI startup specialising in workflow integration, marking its third acquisition in recent months as it aggressively consolidates capabilities to compete with Zendesk, Intercom, and other customer service platforms. Fragment's multilingual conversational AI technology and engineering team, led by co-founders Olivier Moindrot and Guillaume Genthial, will enhance Sierra's agent development efforts and accelerate deployment across European markets. This acquisition reflects rapid consolidation in the enterprise AI agent space, with Sierra—valued at $10 billion and backed by $630 million in funding—positioning itself to move faster through acquisition than organic product development.