Sierra
formerly Sierra AIBetter customer experiences. Built on Sierra.
San Francisco, United States · Founded 2023 · $1.6B raised
- Headquarters
- San Francisco, California
- Employees
- 51–200
- Founded
- 2023
- Business Model
- Services
- Website
- sierra.ai
- Total Funding
- $1.6B
- Last Round
- $950.0M Venture RoundMay 2026
- Rounds
- 4
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
About
Sierra is a conversational AI platform that enables enterprises to build and deploy intelligent customer-facing AI agents. Its Agent OS includes tools for declarative development, CI/CD testing, multi-agent orchestration, memory, and deep analytics, helping businesses deliver personalized, empathetic customer experiences at scale.
Summary
Sierra is an Artificial Intelligence company based in San Francisco, United States, founded in 2023. It has raised $1.6B in total across 4 rounds, most recently a $950.0M Venture Round in May 2026. Investors include Greenoaks Capital, Tiger Global and GV.
Tech & App Stack
27 technologies & apps tracked
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Funding History
May 2026
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Funding: Seed through Venture Round. Amounts, valuations, and investors where available.
Investors
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