Conversational AI platform for enterprises to automate customer service across chat and voice
AI📍 San Francisco, CAFounded 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
HQ
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
Fundraising Status
Growth Round · $950M · 3 mo ago
privateTotal raised $1.6B
Secondary Market
Implied price / share
$65.31
Last round price / share
$81.52
vs last round
-19.9%
Open interest
8
Last round price vs secondary price
Secondary price return by period
Implied per-share price from private secondary transactions, as of Jun 2026. This is a point estimate, not a quote — the feed carries no bid, ask or spread, and a secondary print is evidence of what someone paid on that date rather than a live market. Compare across every tracked name →
Latest Funding Round
Round
Amount
Date
Lead Investor
Post-Money
Growth Round
$950M
May 2026
Greenoaks Capital
—
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
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-Q2. Refreshed quarterly.