Sierra Atlantic
AcquiredBetter customer experiences. Built on Sierra.
- 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.
Tech & App Stack
Tech & App Stack is available on paid plans
Upgrade to Silver or higher to reveal the full technology and app stack for any company.
View pricingSign up to view funding chart
Create a free account to see funding visualizations and detailed round data.
Create Free AccountFunding History
Sep 2025
Oct 2024
Jan 2024
Investors
Sign up to view investors
Create a free account to see which investors have funded this company.
Create Free AccountSimilar Companies
OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artifi...
Anthropic is an AI research company that builds reliable, interpretable, and steerable AI systems.
xAI is an AI platform for accelerating human scientific discovery.
Waymo is an autonomous driving technology company with a mission to make it safe and easy for peo...
Anduril Industries is a defense technology company with a mission to transform US and allied mili...
Databricks is the pioneer of the data lakehouse, a unified platform for data science, machine lea...