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Sierra

AI Native
AI Classification
AI is foundational, and the product wouldn't exist without it.

Bret Taylor's customer service AI startup raises $175M at $4.5B valuation

Total Funding

$350M

Founded

2023

Headquarters

San Francisco, United States

Industry Vertical

Enterprise Software

Technology Segments

AI AgentsCustomer Support Automation

About

Sierra is an enterprise software company specializing in developing and deploying AI-powered agents for customer service. Founded by Bret Taylor and Clay Bavor, Sierra's platform allows organizations in financial services, healthcare, telecommunications, retail, and consumer services to build and implement autonomous agents capable of managing a broad spectrum of customer support tasks. The technology is designed to improve scale, reliability, and experience in customer interactions by automating complex workflows while maintaining high compliance and operational standards.

Sierra serves a global clientele, including numerous Fortune 500 firms.

Funding Rounds

1
DateRoundAmount
2025-09-04$350M

Investors

5
Greenoaks CapitalICONIQThrive CapitalSequoia CapitalBenchmark

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