Founders: Bret Taylor (CEO), Clay Bavor
Launched: 2023
Headquarters: San Francisco
Funding: $1.5 billion
Valuation: $15.8 billion
Key Technologies: Generative AI
Industry: Enterprise technology
Previous appearances on Disruptor 50 list: 1 (No. 48 in 2025)
Long heralded as one of the major players in the agentic AI space, Sierra has ramped up large-scale adoption of its enterprise chatbot product.
Driven by its focus on enterprise businesses, the company sees potential for AI to replace call centers and bots in order to create a better customer experience. Sectors including retail, media, telecom, financial services, and healthcare use its technology. ADT, Rocket Mortgage, GAP, SiriusXM, fellow Disruptor Ramp and Wayfair are among companies using Sierra's AI agents, which process millions of interactions every month.
"The atomic user of an AI system is actually a process," Sierra CEO Brett Taylor told CNBC at Davos 2026. "It might be, say, helping you fix your DirecTV receive, which one of our agents might do. Or it might be onboarding a vendor to your supply chain, and that spans departments. That spans systems of record."
Sierra hit its first $50 million revenue quarter last year, and has posted eight consecutive quarters of over $150 million in annual recurring revenue. Taylor says that growth timeline shows "intense demand in the market."
In November 2025, Sierra introduced its Agent Data Platform, which acts as a brain for its systems to give its AI agents a memory. The feature can recall customers' names and remember prior conversations. This also allows it to take initiative on the user's behalf, letting them know when something is up for renewal or flagging potential issues — and creating a solution before something goes amiss. It also launched Agent Studio 2.0, a no-code app for non-technical employees to help them build customer facing AI agents. Its Insights 2.0 product lets companies research customer interactions, while its Expert Answers can embed employee call center knowledge into AI agents' solutions.
In keeping with the appetite from investors for enterprise AI plays, Sierra's market cap is growing quickly. Earlier this month, it announced a nearly $1 billion funding round valuing the company at close to $16 billion led by Tiger and Google's GV. That followed a $350 million financing round led by Greenoaks Capital last September which valued the company at $10 billion.
With the infusion of funds, it plans to invest more in its platform and expand domestically and internationally. Sierra doubled its headcount last year, and expanded internationally with new offices in France, Japan, and Singapore.
Part of what helps Sierra expand is its emphasis on strategic integrations like OpenAI's ChatGPT (Taylor is OpenAI chairman). This could potentially give the system the ability to operate in other environments and expand its footprint, rather than remain an isolated system. However, with other competitors like fellow Disruptor Decagon, PolyAI and Kore.ai also in the space, it's quickly become a crowded one.
"There's a really big addressable market and immediate opportunity," Taylor told CNBC this month. "We've sort of digitized the last remaining analog channel, which is the telephone line — it's a better experience. You don't need to wait on hold. These agents are naturally multilingual."
While customer service chatbots often escalate more complex tasks to human agents, the rise of agentic AI is itself escalating the focus by companies on how to provide a better customer experience through the rapidly accelerating technology.
"It takes a while for the infrastructure to be built out," Taylor told CNBC. "It takes a while for companies to adopt. The regulatory landscape needs to evolve."
Taylor estimates that of the $400 billion spent annually on customer service, a big part of it is going to move to AI agents.
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