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

Sierra, the customer service startup founded by Bret Taylor, announced Thursday that it has acquired the company YC-backed French startup Fragmentallowing companies to integrate AI into workflows.

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

In a blog post, Taylor and his co-founder, Clay Bavor, wrote that Moindrot and Genthial will add “valuable strength” to Sierra’s “agent development efforts in France.” Terms of the deal were not disclosed. PitchBook estimates that Fragment raised about $2 million in its seed round.

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