Sierra
Sierra is a conversational AI platform founded in 2023 that helps businesses create, deploy, and manage personalized AI agents for customer service and support. The platform focuses on delivering human-like conversations and action-oriented capabilities, ensuring alignment with brand identity. Sierra's headquarters is in San Francisco, with additional offices in New York, Atlanta, and London. The company has raised $285 million in funding, reflecting strong investor confidence in its approach to enterprise AI. The core offering, AgentOS, allows businesses to build and manage AI agents that integrate seamlessly with existing enterprise systems. Key features include the Experience Manager for designing branded conversations, multi-model AI integration for reliability, and personalized agents capable of handling various customer interactions across multiple channels. Sierra also emphasizes security and compliance, ensuring data privacy and strict access controls. The platform supports 24/7 multilingual assistance and aims to enhance customer experience through continuous improvement and analytics.
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Headcount trend
Sierra went from 70 employees in Jul 2023 to 252 in Jun 2025. Jan to Jun 2025: 100 people joined, 6 left.
Headcount data through Jun 2025
Org structure
Headcount by department
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All salaries82 salary profiles in the US
Most reported roles
Funding
- Sep 2025 · Venture · $350M · ICONIQ Capital, Thrive Capital, Greenoaks Capital Partners
- Oct 2024 · Venture · $175M · Thrive Capital, Greenoaks Capital Partners, IONIQ Group
- Feb 2024 · Venture · $110M · Conviction, Benchmark, Sequoia
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Sierra FAQ
How many employees does Sierra have?
Sierra has about 252 employees, up 15.6% over the 3 months to Jun 2025.
What is Sierra's revenue per employee?
Sierra makes about $397K in revenue per employee, based on $100M annual revenue and 252 employees.
How much does Sierra pay?
6figr has 82 salary profiles for Sierra in the US and 14 in India, with pay broken down by role, level, gender and ethnicity on the Sierra salaries page. See Sierra salaries in the US
How much funding has Sierra raised?
Sierra has raised $635M in total funding.
Data from Company Prospectus, DOL LCA disclosures, WARN notices and 6figr salary profiles.