How Sierra is Building Better Customer Experiences

Sierra, helping businesses build better, more human customer experiences with AI, led by Bret Taylor and Clay Bavor, has raised $950 million from new and existing investors, led by Tiger Global and GV, at a valuation of over $15 billion. Sierra now has more than $1 billion to invest in becoming the global standard for companies wanting to transform their customer experiences with AI.

Confidence in the opportunity for Sierra and its customers has grown significantly. From just four design partners a few years ago, the platform now serves over 40% of the Fortune 50, with agents powering billions of customer interactions, from refinancing homes and processing insurance claims to handling returns and supporting large-scale fundraising.

An Intelligence Inflection Point

AI has advanced rapidly, expanding both capability and adoption. For Sierra, agents have evolved from handling basic support tasks to powering the full customer lifecycle across industries such as insurance, banking, healthcare, telecom, and retail.

This shift is also accelerating deployment timelines. Companies like Nordstrom, Singtel, and The Cigna Group have launched production-grade agents within weeks, delivering higher efficiency, faster resolution, and improved customer outcomes.

From Digitization to True Transformation

AI agents are moving beyond simple digitization toward real transformation. At Sierra, agents have already digitized the last major analog channel, the telephone, enabling faster, always-available interactions without traditional friction.

The next shift lies in what follows: agents that are personal, proactive, and autonomous. Instead of handling one-off queries, they manage ongoing customer relationships, anticipating needs, resolving issues, and driving outcomes like sales, retention, and loyalty.

This marks a transition from improving existing workflows to fundamentally reshaping customer experience, which Sierra is building for through its platform and partnerships.