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Sierra

Raised $950M, announced 4 May 2026.

Round

Sierra raised $950 million at a $15.8 billion valuation, led by Tiger and GV.

Amount
$950M
Announced
4 May 2026
Leads
Tiger Global, GV
Other investors
Benchmark, Sequoia, Greenoaks
Use of funds
To become the global standard for AI-powered customer experiences and expand its lead over competitors.
Valuation
$15.8B
Checked
Amount and date matched across 3 press sources

Company

Builds AI agents that handle customer service and experience for enterprises.

Based in
San Francisco
Sector
AI
Website
sierra.com ↗

Founders

Sources and links

Sources
Sierra raises $950 million: Bret Taylor’s AI Agent Startup Now Valued at Over $15 Billion - www.trendingtopics news.google.com
Sierra raises $950M at $15.8B valuation, led by Tiger and GV - Quartz news.google.com
Sierra raises $950M as the race to own enterprise AI gets serious - TechCrunch news.google.com
Website
sierra.com ↗
LinkedIn
Bret Taylor ↗, Clay Bavor ↗
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