Sierra, the customer service agent startup founded by Bret Taylor, has acquired the Y Combinator-backed French company Fragment. The deal, announced on Thursday, marks Sierra's third public acquisition. Earlier this year, the company purchased Japan-based enterprise AI firm Opera Tech and voice agent developer Receptive AI in late March. This series of moves underscores Sierra's aggressive expansion into specialized AI capabilities. Fragment specializes in helping businesses integrate artificial intelligence directly into their existing workflows. The acquisition brings co-founders Olivier Moindrot and Guillaume Genthial to the Sierra team. In a blog post, Taylor and Sierra co-founder Clay Bavor stated that the new hires will provide valuable strength to the company's agent development efforts in France. While specific financial terms were not disclosed, industry data from PitchBook indicates that Fragment had raised approximately $2 million during its seed funding round. Taylor, who currently serves as chairman of the board at OpenAI, co-founded Sierra after stepping down as co-CEO of Salesforce in early 2023. Working alongside Bavor, a former Google executive, Taylor built the company into a significant player in the enterprise AI space. Sierra has secured more than $630 million in funding from prominent investors, including Sequoia and Benchmark. These investments have valued the company at $10 billion. Major clients of Sierra include Casper, Clear, and Brex, highlighting the startup's rapid traction in the market. The acquisition of Fragment adds to Sierra's growing portfolio of tools designed to automate customer interactions. By integrating Fragment's workflow solutions with Sierra's existing agent platform, the company aims to enhance the depth of automation it can offer to enterprises. The addition of the French founders is expected to bolster Sierra's presence in the European market while accelerating the development of new agent technologies. Sierra's strategy of acquiring specialized teams allows it to quickly ingest new technologies rather than building them from scratch. The previous purchases of Opera Tech and Receptive AI followed a similar pattern, targeting specific niches in AI and voice technology. This approach positions Sierra to offer a more comprehensive suite of products to its large customer base. The integration of Fragment's technology is expected to begin immediately as the new leadership settles into their roles. The broader context of these acquisitions reflects a competitive landscape where large tech players and well-funded startups are rapidly expanding their artificial intelligence offerings. With a valuation of $10 billion and a roster of high-profile customers, Sierra is well-positioned to continue its growth trajectory. The inclusion of French talent further diversifies the company's development capabilities, potentially opening new avenues for innovation in agent creation and deployment. As Sierra continues to evolve, the focus remains on delivering efficient, scalable AI solutions that meet the complex needs of modern businesses.