Sierra

Conversational AI platform for enterprises to automate customer service across chat and voice

AI 📍 San Francisco, CA Founded 2023

Current Valuation

$15B

as of 2026-Q2

DECACORN

Sierra is a San Francisco–based enterprise conversational-AI platform co-founded in 2023 by former Salesforce co-CEO Bret Taylor and former Google VP Clay Bavor. It builds custom AI agents that handle customer service across chat and voice for enterprises including SoFi, Ramp, Brex, WeightWatchers, and ADT. In May 2026 it raised a $950M growth round led by Greenoaks at a $15B valuation — up from $10B in September 2025 and $4.5B in October 2024. Sacra estimates 2026 revenue at roughly $150M, with growth of about 400% YoY.

Company Profile

CEO

Bret Taylor

Founded

2023

San Francisco, CA

Employees

~250

Total Raised

$1.6B

Est. Revenue

$150M (2026)

Growth

+400% YoY revenue growth (Sacra); $15B valuation reached May 2026

Last Round

Growth Round — $950M (May 2026) · Lead: Greenoaks Capital

IPO Status

private

Founders & Key People

Bret TaylorClay Bavor

Investors

Greenoaks Capital · Sequoia Capital · Benchmark · ICONIQ Capital · Thrive Capital

Products

Sierra AI Agents (custom conversational agents for enterprises)
Voice AI Channel
Chat AI Channel
Agent Quality & Evaluation Tools

Competitors

Decagon · Cresta · Ada · Forethought · Salesforce Agentforce · Intercom Fin

AIEnterprise AICustomer SupportConversational AIDecacorn