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Lean SuperIntelligence (LSI)

Palo Alto, United States

pre-seedFreshly fundedCybersecurityAI & MLAI Infrastructure

◆ Stage

pre-seed

◆ Location

Palo Alto, United States

◆ Team size

1-10

◆ Links

◆ About Lean SuperIntelligence (LSI)

Palo Alto-based startup building self-improving cybersecurity large language models that run on customers' own infrastructure.

◆ What sets it apart

Self-improving offense and defense security LLMs designed for on-premises, air-gapped, sovereign, or managed deployment, allowing customers to retain control of sensitive code and telemetry.[1][2]

◆ Sectors

CybersecurityAI & MLAI InfrastructureEnterprise Software

◆ Business

ModelSaaS

CustomerSecurity vendors, managed security service providers, selected Fortune 500 enterprises, and government teams.[1][2]

◆ Notable

  • Closed an initial pre-seed financing round on October 9, 2026.[1][2]
  • Launched LSI-Offense-1 and LSI-Defense-1 for limited design-partner access.[1]
  • Reported strong performance on public defense benchmarks at a fraction of the cost of comparable frontier models.[1]

◆ Funding rounds

9 Oct 2026

Led by Fusion Fund

Source ↗

◆ Explore the market

◆ FAQ

What does Lean SuperIntelligence (LSI) do?

Palo Alto-based startup building self-improving cybersecurity large language models that run on customers' own infrastructure.

Where is Lean SuperIntelligence (LSI) based?

Lean SuperIntelligence (LSI) is based in Palo Alto, United States.

Who has invested in Lean SuperIntelligence (LSI)?

Investors in Lean SuperIntelligence (LSI) include Fusion Fund.