Reinforcement learning environments for frontier AI labs and enterprise agent workflows
Fleet builds high-fidelity reinforcement learning environments — practice arenas where AI agents repeatedly attempt multi-step enterprise workflows (claim processing, CRM updates, IDE tasks), fail safely, and learn before deployment. The company's Python SDK exposes versioned, deterministic environments programmatically; its Harbor evaluation framework runs thousands of parallel agent experiments. Annualized revenue jumped from roughly $1M at the end of 2025 to ~$60M by April 2026 on frontier-lab demand for post-training data, and Fleet is in talks to raise ~$50M at a ~$750M valuation led by Bain Capital Ventures with Sequoia, Menlo, and SV Angel participating.
AI📍 New York, NYFounded 2024
Current Valuation
$750M
as of 2026-Q2
PRIVATE
QL Price
$768.91M
+3% vs last round
QuantLogix's current estimate for Fleet, published 2026-10-07 — in line with the last disclosed round of $750M (2026-Q2).
Confidence
medium
Basis
comps led
What backs this price
Last disclosed round
$750M
2026-Q2
weight 0.83
Public-company comparables
$863.4M
2026-Q1
weight 0.17
How this price has held up
No round has priced for Fleet 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, Fleet, 2026-10-07 (3b0ce7a7f90b2831).
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 Fleet going public?
No. Fleet is private and has not filed to go public. There is no S-1 on file.
What is Fleet's valuation in 2026?
Fleet is valued at $750M as of 2026-Q2, set by its Series A (in progress) ($50M, Apr 2026). That is the last confirmed mark, not a live price — private shares do not trade continuously.
Has Fleet filed an S-1?
No public S-1 is on file for Fleet.
Who are Fleet's investors?
Fleet's investors include Bain Capital Ventures, Sequoia Capital, Menlo Ventures, SV Angel.
How much has Fleet raised?
Fleet has raised $15M in total, most recently a Series A (in progress) of $50M in Apr 2026.
Is Fleet publicly traded — can you buy Fleet stock?
No. Fleet 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 Fleet 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
Nicolai Ouporov
Founded
2024
HQ
New York, NY
Employees
~60
Total Raised
$15M
Est. Revenue
$60M (2026-Q1)
Growth
Annualized revenue scaled from ~$1M (2025) to ~$60M (April 2026) on frontier-lab demand for RL training environments
Last Round
Series A (in progress) — $50M (Apr 2026) · Lead: Bain Capital Ventures (in talks)
IPO Status
private
Fundraising Status
Series A (in progress) · $50M · 6 mo ago
privateTotal raised $15M
Latest Funding Round
Round
Amount
Date
Lead Investor
Post-Money
Series A (in progress)
$50M
Apr 2026
Bain Capital Ventures (in talks)
—
Vertical Intelligence — AI / ML
Open models
5
Downloads (30d)
0
across all models
Followers
8
Attributed to Hugging Face organization "Fleet AI Inc." as of 2026-10-04. Open-weights footprint only — closed-model usage is not publicly measurable. Verify on Hugging Face ↗
Talent Signal
Hiring trend
▶ Hiring steady
0% vs 2026-08
Open roles
43
via greenhouse
Product-build share
47%
engineering, research, product, design
Trajectory
steady
product-led hiring — 47% of open roles build product; the rest are go-to-market and G&A.
Actively hiring with no tracked executive churn.
Open roles by month
Open roles by function
■ product-building ■ go-to-market / G&A
Commissioning Senior Manager - ElectricalCommissioning Senior Manager - MechanicalData Center Construction Security ManagerData Center Construction Security ManagerDirector Global Category Management - MechanicalPrincipal Structural Engineer
Counted from Fleet's live job board as of 2026-09-16; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.
Founders & Key People
Nicolai Ouporov
Investors
Bain Capital Ventures · Sequoia Capital · Menlo Ventures · SV Angel
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.