Companies › Sierra
Sierra logo

Sierra

San Francisco, US · founded 2023 · ~500 employees · Software Publishers · Crunchbase rank #157 · sierra.ai

Sierra AI develops artificial intelligence systems focused on improving customer experience through automated, conversational interactions. Its platform enables businesses to build and deploy AI agents that communicate with users across channels such as chat, voice, email, and messaging, handling both simple inquiries and more complex service tasks. These agents are designed to go beyond basic responses by taking actions within business systems, such as processing requests or managing customer accounts. The company’s technology integrates with existing enterprise tools and data sources, allowing organizations to incorporate AI-driven support into their operations without replacing underlying infrastructure. Overall, Sierra AI operates as a software provider that uses large language models and automation capabilities to support and scale customer service functions for enterprises.

Funding

1
Every round, secondary, debt facility or acquisition involving Sierra that AI Lounge tracks, newest first. Latest: Series E on May 4, 2026.
Sierra logo
GV (lead), Tiger Global (lead) · AI
$950M
val. $15.8B
105× EV/ARR

Timeline · 5

Oct 10, 2026
Signal
Total funding up to $1.6B · from $635M
May 4, 2026
Round
Series E · $950M at $15.8B · GV, Tiger Global
May 4, 2026
Deal

In the news

3
Members see every AI company on AI Lounge with revenue, funding, valuation and investors, searchable and sortable, free.
Create my free account →Log in