Sierra

Private

San Francisco enterprise conversational AI platform building agents that handle customer experiences end-to-end including refinancing mortgages, processing insurance claims, returns, and fundraising. Customers include 40%+ of Fortune 50, with billions of interactions processed annually. Crossed $150M ARR in early 2026.

Founders Bret Taylor

CEO Bret Taylor

Company

Founded

2023

Headquarters

San Francisco, United States

Financials

Total Funding

$1.6B

Last Valuation

$15.8B

Sectors

Artificial Intelligence SaaS Enterprise Software

sierra.ai

Funding History

4 rounds

Series D May 4, 2026

$950M

Valuation: $15.8B

Tiger Global Management (Lead) GV Benchmark Sequoia Capital Greenoaks Capital Partners

Series C Sep 15, 2025

$350M

Valuation: $10.0B

Greenoaks Capital Partners (Lead) Sequoia Capital Benchmark

Series B Oct 28, 2024

$175M

Valuation: $4.5B

Greenoaks Capital Partners (Lead) Sequoia Capital Benchmark

Series A Feb 13, 2024

$110M

Valuation: $1.0B

Sequoia Capital (Lead) Benchmark

Funding data is compiled from multiple independent sources including company announcements, press coverage, and regulatory filings. While we strive for accuracy, amounts and dates may reflect reported figures at time of announcement.