Sierra Atlantic
AcquiredBetter customer experiences. Built on Sierra.
San Francisco, United States · Founded 2024 · $635.0M raised
- Headquarters
- San Francisco, California
- Employees
- 201–500
- Founded
- 2024
- Business Model
- B2B
- Website
- sierraatlantic.com
- Total Funding
- $635.0M
- Last Round
- $350.0M Series BSep 2025
- Rounds
- 3
About
Sierra helps businesses build better, more human customer experiences with AI. Founded in 2023 by Bret Taylor, the company develops AI agents for customer service that handle tasks across chat, SMS, WhatsApp, email, voice, and more, with outcome-based pricing.
Summary
Sierra Atlantic is an Artificial Intelligence company based in San Francisco, United States, founded in 2024. It has raised $635.0M in total across 3 rounds, most recently a $350.0M Series B round in Sep 2025. Investors include Greenoaks Capital, Sequoia Capital and Benchmark.
Tech & App Stack
3 technologies & apps tracked
Every product and vendor across these categories, with where each signal came from.
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Funding History
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Sep 2025
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Venture Round through Series B — per-round amounts, valuations, and who invested in each round.
Investors
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