Sierra, a San Francisco, CA–based AI startup, has raised $950 million in funding, valuing the company at over $15 billion post-money.
Investors
The round was led by Tiger Global and GV, with participation from additional undisclosed investors.
Tiger Global is a research-driven investment firm that pursues a long-term approach to partnering with high-quality, innovative companies across different stages of their lifecycle. The firm focuses on backing high-growth companies across public equities and private markets in the technology, internet, software, and fintech sectors, investing in both early-stage startups and large publicly traded companies worldwide.
Founded in 2009, GV is the corporate venture capital arm of Alphabet. Based in San Francisco, California, it invests in enterprise, life sciences, consumer, and frontier technology sectors. The firm has additional offices in Cambridge, London, and New York. GV manages over $10 billion in assets under management (AUM) and has a portfolio of more than 400 active companies.
Sierra Use of Funds
The company will use the funds to expand its AI platform, scale enterprise adoption, and position itself as the global standard for AI-driven customer experiences.
About Sierra
Founded by Bret Taylor and Clay Bavor, Sierra is an enterprise AI company focused on building AI-powered agents that handle customer interactions across industries. Its platform enables businesses to automate complex workflows such as mortgage refinancing, insurance claims processing, returns management, and nonprofit fundraising. Sierra’s agent-as-a-service tool, Ghostwriter, enables businesses to generate custom AI agents from natural language. The company has offices in New York, Atlanta, London, Singapore, Tokyo, Paris, Madrid, Toronto, and San Francisco.
Funding Details
Company: Sierra
Raised: $950.0M
Round: Unknown
Funding Date: May 2026
Lead Investors: Tiger Global, GV
Additional Investors:
Company Website: https://sierra.ai/
Software Category: Enterprise AI / Customer Experience AI
Source: https://techcrunch.com/2026/05/04/sierra-raises-950m-as-the-race-to-own-enterprise-ai-gets-serious/