Brett Taylor’s Sierra buys YC-backed AI startup Fragment

Sierra, the customer service startup founded by Brett Taylor, announced Thursday that it has acquired YC-backed French startup Fragment, which helps businesses integrate AI into workflows.

This is Sierra’s third public acquisition. It previously bought Japan-based enterprise AI solutions company Opera Tech (which it acquired in late March) and voice agent company Receptive AI (which it also announced it acquired in late March). Fragment co-founders Olivier Moindrot and Guillaume Genthail will join the Sierra team.

In a blog post, Taylor and his co-founder, Clay Bavor, wrote that Moindrot and Genthail will bring « valuable strength » to Sierra’s « agent development efforts in France. » Terms of the deal were not disclosed. Pitchbook estimates that Fragment has raised about $2 million through its seed round.

Taylor, who is also OpenAI’s board chairman, co-founded Sierra with Google Fellow Bavor after stepping down as Salesforce co-CEO in early 2023. The startup claims Casper, Clear and Brex as customers and has so far raised more than $630 million in funding from investors including Sequoia and Benchmark, giving it a $10 billion valuation.