Conversational AI platform for enterprises to automate customer service across chat and voice
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.
AI📍 San Francisco, CAFounded 2023
Current Valuation
$15B
as of 2026-Q2
DECACORN
QL Price
$12B
-21% vs last round
QuantLogix's current estimate for Sierra, published 2026-10-07 — below the last disclosed round of $15B (2026-Q2).
Confidence
medium
Basis
blended
What backs this price
Last disclosed round
$15B
2026-Q2
weight 0.83
Secondary market print
$12B
2026-06-27
weight 0.54
Public-company comparables
$2.2B
2026
weight 0.27
How this price has held up
No round has priced for Sierra since QuantLogix began publishing a price for it, so there is nothing to grade yet. The claim above is on the record from 2026-10-07 and will be graded against the next priced round. See the full accuracy record →
Which publicly-traded funds already hold it, what $10,000 buys, and whether any route is open to you.
Cite this price as QuantLogix QL Price, Sierra, 2026-10-07 (6637da8905b241aa).
The id pins this exact claim, so a citation stays checkable after the price moves.
Model estimate for research — not a quote, target price, or investment advice.
IPO Outlookprivate
Is Sierra going public?
No. Sierra is private and has not filed to go public. There is no S-1 on file.
What is Sierra's valuation in 2026?
Sierra is valued at $15B as of 2026-Q2, set by its Growth Round ($950M, May 2026). That is the last confirmed mark, not a live price — private shares do not trade continuously.
Sierra has raised $1.6B in total, most recently a Growth Round of $950M in May 2026.
Is Sierra publicly traded — can you buy Sierra stock?
No. Sierra is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Sierra on its Pre-IPO Access Desk.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
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 · 5 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
—
Vertical Intelligence — AI / ML
No verified Hugging Face organization found for Sierra — no attributable open-model footprint. Closed-weights labs are common; this is a distribution signal, not a capability judgment.
Checked huggingface.co as of 2026-10-04. Re-checked weekly.
Talent Signal
Hiring trend
▶ Hiring steady
+9% vs 2026-08
Open roles
209
via ashby
Product-build share
41%
engineering, research, product, design
Trajectory
strengthening
balanced build + GTM — 41% builders vs 59% go-to-market/G&A — scaling both sides.
Recent senior hires: 2 senior hires (CEO, CFO).
Open roles by month
Open roles by function
■ product-building ■ go-to-market / G&A
Key Executive Moves
INDan JablonskyCEO · 2026-09-07
INJulia Brau DonnellyCFO · 2026-09-07
From trusted-source news extraction (deep-enrich pipeline); dates approximate publication, not effective date.
Software Engineer, PlatformProduct Manager, Agent Data PlatformProduct Manager, Agent DevelopmentSoftware Engineer, AgentProduct DesignerProduct Manager, Agent Development (German speaking)
Counted from Sierra's live job board as of 2026-09-15; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.
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 AI
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.