Brett Taylor Sierra buys YC-backed AI startup

Sierra, a customer service startup founded by Brett Taylor, announced Thursday that it has acquired the YC-backed French startup, which helps companies integrate artificial intelligence into their workflow.

This is Sierra’s third public acquisition. It previously acquired Japan-based 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 Genthel will join the Sierra team.

In a blog post, Taylor and his co-founder, Clay Bavur, wrote that Moindrot and Gentil will bring “valuable strength” to Sierra’s “customer development efforts in France.” Terms of the deal were not announced. Pitchbook estimates that Fragment has raised about $2 million through its seed round.

Taylor, who also serves as chairman of OpenAI, co-founded Sierra alongside Google alum Bavor after stepping down as co-CEO of Salesforce in early 2023. The startup claims Casper, Clear, and Brex as clients, and has raised more than $630 million in funding to date, from investors including Sequoia and Benchmark, giving it a $10 billion valuation.