rl-list.com
UPDATED 2026.06.07
rl-list.com · Vendors · Fleet AI
#6

Fleet AI

Commercial
medium confidence
www.fleetai.com ↗ · Status: active confirmed · Founded 2024

Fleet AI builds high-fidelity reinforcement-learning training environments ('gyms') that replicate enterprise software such as Salesforce and Excel, plus browser/desktop workflows, so frontier AI labs and large enterprises can train and evaluate computer-use agents. It ships a Python SDK, a platform API, and the open-source 'Harbor' agent-evaluation/RL-environment tooling, pairing simulated environments with human supervision.

Key facts
Headquarters
New York, NY, USAreported cite
Headcount band
11-50reported cite
Total raised
$15Mreported cite
Last round
Reported in talks (not confirmed closed): at least $50M at ~$750M post-money valuation, with Bain Capital Ventures reported as prospective lead, ~April 2026. Prior disclosed: ~$15M seed.reported cite
SOC 2
unknown cite
What they sell
environmentsconfirmed cite
Open source
yesconfirmed cite
Deployment
managed-hosted (platform API + Python SDK); some tooling is self-hostable via OSS reposestimated cite

Scale & velocity

Current headcount
11-50 per LinkedIn public company-size band as of 2026-06-07 (RocketReach ~41 is consistent); an earlier draft figure of ~133 could not be reproduced and appears erroneousreported cite
Headcount growth
unknown
Open roles
unknown cite
Other locations
San Francisco, CA (careers page lists SOMA office, in conflict with NY HQ), Delray Beach / Chelsea-area secondary office (signals conflict: LinkedIn lists Delray Beach, FL; careers page lists New York/Chelsea)reported cite
Distributed / remote
unknown cite

Research depth

Has researchers
yesreported cite
Researcher count
unknown
Backgrounds
Team self-describes prior experience at Anthropic, xAI, Meta Superintelligence, Essential AI, Contextual AI, Mercor, Docker, Citadel, Jane Street, and Cruise, Founder/CEO Nicolai (Nic) Ouporov: ex-founding engineer at Respell (acquired by Salesforce, Jan 2024); prior research at Stanford and Columbia per personal sitereported cite
Papers / benchmarks
'Harbor', open-source framework for agent evaluations and creating/using RL environments (Apache-2.0; published under Fleet AI's GitHub org and a standalone harbor-framework repo)reported cite

Capital

Total raised
~$15M disclosed (seed); a further round of at least $50M was reported in negotiation (~April 2026) but not confirmed closedreported cite
Last round
Reported in talks (not confirmed closed): at least $50M at ~$750M post-money valuation, with Bain Capital Ventures reported as prospective lead, ~April 2026. Prior disclosed: ~$15M seed.reported cite
Investors
Sequoia Capital, Menlo Ventures, SV Angel, Bain Capital Ventures (reported prospective lead of an in-talks round; not confirmed closed)reported cite
Valuation
~$750M reported for an in-talks round (~April 2026, not confirmed closed); prior seed valuation reported under $100Mreported cite
Revenue signals
Reported ~$60M annualized run-rate (~April 2026, computed as latest quarter x4), up from ~$1M annualized end-2025reported cite

Security & compliance

SOC 2
unknown cite
Other certifications
unknown
Security page
unknown cite

Product

What they sell
environmentsconfirmed cite
Open source
yesconfirmed cite
License
Apache-2.0 (for published OSS repos such as fleet-sdk, zeroboot, harbor); core hosted product not open sourceconfirmed cite
Deployment model
managed-hosted (platform API + Python SDK); some tooling is self-hostable via OSS reposestimated cite
Maturity
GAestimated cite
Notable customers
unknown

Buyer analysis

Best fit: A frontier lab or large enterprise that needs bespoke, high-fidelity RL environments simulating real enterprise software (CRM, spreadsheets, browser/desktop) to train and evaluate computer-use agents.

How we verified this

Confirmed Fleet AI (fleetai.com / GitHub fleet-ai / team@fleet.so / LinkedIn 'fleet-so') is the correct 'enterprise agent environments' company building RL training gyms (Salesforce/Excel/browser/desktop replicas) for frontier labs, matches the directory note; no wrong same-named entity. Biggest corrections: (1) headcount is 11-50 per LinkedIn, not the draft's 133-derived 51-200 band; (2) the company IS open source (Apache-2.0 fleet-sdk, zeroboot, harbor, harbor-train), reversing the draft's 'no'; (3) the $50M+/~$750M/BCV round is only IN TALKS, not closed, only Sequoia, Menlo, and SV Angel are confirmed investors on the official site, so BCV is labeled a prospective lead. Funding/valuation/revenue figures all rest on press (KuCoin/Phemex/The Information, the latter paywalled) plus Sacra, so kept at 'reported'. No customers are third-party-verified (only frontier-lab/enterprise buyer CATEGORY is cited), kept empty/unknown. No SOC 2 or trust page exists; security page 404s, kept unknown. founded_year 2024 and active status corroborated. Self-described team backgrounds and distributed/remote inference downgraded. Overall confidence: medium.

Related vendors

Mechanize CommercialAfterQuery CommercialDeeptune CommercialBespoke Labs Commercial

Sources

  1. www.fleetai.com/ · 2026-06-07, Official homepage, mission, status page (All Systems Operational).
  2. www.fleetai.com/about · 2026-06-07, Official about page, founder, team backgrounds (Anthropic, xAI, Meta Superintelligence, Docker, Jane Street, Cruise), 'training gyms for agents', investors.
  3. www.fleetai.com/careers · 2026-06-07, Careers page, lists SF (SOMA) HQ and NYC (Chelsea) satellite office; no numeric open-role count.
  4. www.fleetai.com/security · 2026-06-07, Returned HTTP 404, no security/trust page found.
  5. sacra.com/c/fleet/ · 2026-06-07, Third-party profile, revenue ($60M annualized Apr 2026 from $1M 2025), seed $15M, pending $50M+ at ~$750M, HQ New York, Harbor eval framework, 99.993% uptime.
  6. www.kucoin.com/news/flash/ai-training-firm-fleet-eyes-750m-valuation-ami · 2026-06-07, Press, founded 2024, founder Nic Ouporov (ex-Respell), $50M+ round, $750M valuation, Bain Capital Ventures lead, seed under $100M valuation.
  7. www.theinformation.com/newsletters/ai-agenda/reinforcement-learning-gym- · 2026-06-07, The Information article (paywalled, not circumvented), headline confirms $750M valuation RL-gym startup.
  8. www.nicolas.info/ · 2026-06-07, Founder personal site, background (Respell/Salesforce, Stanford Robotics, Columbia Creative Machines), 'applied AI & product lab. Simulations for testing & training agents.'
  9. www.linkedin.com/company/fleet-so · 2026-06-07, Public LinkedIn company snippet, ~133 employees, New York NY HQ, 'Gym Environments for Frontier Agents', Software Development industry.
  10. rocketreach.co/fleet-ai-management_b6f95050c628d05e · 2026-06-07, Third-party, ~41 employees (conflicts with LinkedIn).
  11. www.crunchbase.com/organization/fleet-6338 · 2026-06-07, Crunchbase profile, returned HTTP 403 (not accessible).
  12. sapphireventures.com/blog/reinforcement-learning-environments-ai-agents/ · 2026-06-07, VC market overview, Fleet positioned alongside Habitat and Matrices building enterprise-software/web RL environments; frontier labs (Anthropic/OpenAI/Google) as buyer category.
  13. newsletter.semianalysis.com/p/rl-environments-and-rl-for-science · 2026-06-07, Market context on RL environments / data foundries.
Last updated 2026-06-07 · Every quantitative field carries a source and a confidence tag. Fields we could not source publicly are marked unknown, never estimated. See the methodology.