Real-time voice AI infrastructure powered by state space models
Cartesia builds real-time voice AI infrastructure for conversational agents, anchored on state space model (SSM) research from co-founder Albert Gu (the author of Mamba) and Karan Goel. The company's Sonic-3 model targets sub-100ms latency at production scale, putting it head-to-head with ElevenLabs in the booming voice-agent market. Cartesia raised $100M in late 2025 led by Kleiner Perkins to expand into enterprise voice agents and ship lower-latency turn-taking.
AI📍 San Francisco, CAFounded 2024
Current Valuation
Private
as of 2025-Q4
PRIVATE
IPO Outlookprivate
Is Cartesia going public?
No. Cartesia is private and has not filed to go public. There is no S-1 on file.
What is Cartesia's valuation in 2026?
No confirmed valuation is on record for Cartesia. The roster shows funding and investors where they are public; it does not estimate a mark.
Has Cartesia filed an S-1?
No public S-1 is on file for Cartesia.
Who are Cartesia's investors?
Cartesia's investors include Kleiner Perkins, Lightspeed, Index Ventures, A* Capital, Conviction.
How much has Cartesia raised?
Cartesia has raised $191M in total, most recently a Series B of $100M in Nov 2025.
Is Cartesia publicly traded — can you buy Cartesia stock?
No. Cartesia 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 Cartesia 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
Karan Goel
Founded
2024
HQ
San Francisco, CA
Employees
~50
Total Raised
$191M
Growth
Series B growth-stage
Last Round
Series B — $100M (Nov 2025) · Lead: Kleiner Perkins
IPO Status
private
Fundraising Status
Series B · $100M · 11 mo ago
privateTotal raised $191M
Secondary Market
Implied price / share
$18.67
Last round price / share
$18.67
vs last round
0.0%
Open interest
1
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
Series B
$100M
Nov 2025
Kleiner Perkins
—
Vertical Intelligence — Defense / Aerospace
No name-verified federal prime awards for Cartesia in the last 36 months on USASpending.gov — revenue may be classified, flow through subcontracts, or be non-US. Absence of a registry match is reported as-is.
Checked usaspending.gov as of 2026-10-05. Re-checked weekly.
Talent Signal
Hiring trend
▶ Hiring steady
-9% vs 2026-08
Open roles
31
via ashby
Product-build share
65%
engineering, research, product, design
Trajectory
steady
heavy product build — 65% of open roles are product-building functions (engineering/research/product) — 10 of 31 open roles are engineering.
Counted from Cartesia's live job board as of 2026-09-14; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.
Founders & Key People
Karan GoelAlbert Gu
Investors
Kleiner Perkins · Lightspeed · Index Ventures · A* Capital · Conviction
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2025-Q4. Refreshed quarterly.