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Sierra
Sierra is the conversational AI platform for businesses. We help companies elevate their customer experience with AI.
Sierra
Sierra is the conversational AI platform for businesses. We help companies elevate their customer experience with AI.
TL;DR
Company: Sierra — conversational AI platform for enterprise customer experience
Founders: Bret Taylor and Clay Bavor
Recent funding: $950M round (May 2026) led by Tiger Global and GV; post-money valuation reported above $15B
Product focus: Agent OS (Agent Studio, Ghostwriter) and multichannel AI agents for chat, voice, email, SMS, WhatsApp, ChatGPT
Company Overview
Problem Domain
Customer experience automation and conversational AI for enterprises
Industry
Software Development
Funding Track Record
110000000
Reported earlier financing of roughly $110M in 2024
350000000
Round reported Sep 4, 2025 valuing company at about $10B
950000000
Round reported May 4, 2026, reported post-money valuation above $15B
Investor Signal
“Raised large strategic rounds with participation from top-tier investors (Tiger Global, GV, Greenoaks, Sequoia, Benchmark)”
Founders
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