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Horizon3.ai Raises $250M at $2B Valuation for Autonomous Pentesting

WireByte Staff · August 3, 2026

Horizon3.ai, a startup specializing in autonomous pentesting, has raised $250 million in a Series E round, valuing the company at over $2 billion. The funding will be used to expand its sales operation and enter new markets in Australia and Singapore. The company's NodeZero platform has seen significant growth, with over 6,500 organizations using the service, including the US National Security Agency and Fortune 10 companies.

Key points

  • Horizon3.ai, a US-based autonomous pentesting startup, has raised $250 million in a Series E funding round, valuing the company at over $2 billion.
  • The funding will be used to expand the company's sales operation and enter new markets in Australia and Singapore.
  • Horizon3.ai's NodeZero platform has seen significant growth, with over 6,500 organizations using the service, including the US National Security Agency and Fortune 10 companies.
  • The platform has run over 300,000 pentests in production, generating a large volume of attack data that the company considers a valuable asset.
  • Annual recurring revenue grew 120% year-over-year, indicating strong demand for the company's services.

Horizon3.ai, a US-based startup, has made significant strides in the field of autonomous pentesting. The company's NodeZero platform uses artificial intelligence to simulate real-world attacks on customers' networks, providing valuable insights into potential security vulnerabilities. With over 6,500 organizations using the service, including the US National Security Agency and Fortune 10 companies, Horizon3.ai has established itself as a leader in the industry.

The company's recent Series E funding round has valued Horizon3.ai at over $2 billion, a significant increase from its previous valuation of $650 million. The $250 million raised will be used to expand the company's sales operation and enter new markets in Australia and Singapore.

Horizon3.ai's growth can be attributed to the increasing demand for autonomous pentesting services. The company's platform has run over 300,000 pentests in production, generating a large volume of attack data that the company considers a valuable asset. Annual recurring revenue grew 120% year-over-year, indicating strong demand for the company's services.

As the cybersecurity landscape continues to evolve, Horizon3.ai is well-positioned to capitalize on the growing demand for autonomous pentesting services. With its strong growth trajectory and significant funding, the company is likely to remain a major player in the industry.

Sources

WireByte Staff — Editorial Team

The WireByte editorial team synthesises technology news from multiple primary sources, verifies the facts, and links every source. Articles are produced with AI assistance and reviewed under our editorial policy.