Reinforcement learning environments for frontier AI labs and enterprise agent workflows
AI📍 New York, NYFounded 2024
Current Valuation
$750M
as of 2026-Q2
PRIVATE
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.
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.
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.
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 · 4 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
6
Attributed to Hugging Face organization "Fleet AI Inc." as of 2026-08-19. Open-weights footprint only — closed-model usage is not publicly measurable. Verify on Hugging Face ↗
Talent Signal
Hiring trend
▲ Hiring uptrend
100% of roles posted in last 30d
Open roles
43
via greenhouse
Product-build share
72%
engineering, research, product, design
Trajectory
expanding
heavy product build — 72% of open roles are product-building functions (engineering/research/product) — 13 of 43 open roles are engineering.
No tracked executive churn; open roles trending up.
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 - MechanicalDirector Network Engineer
Counted from Fleet's live job board as of 2026-08-17; 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.