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Petra Security

Total raised$5.0M
Hiring pace7 roles / 90d
Founded2023
Team size11-50
HQSan Francisco, California
IndustriesCybersecurity

About Petra Security

Petra Security is an AI-powered cybersecurity company that specializes in identity threat detection and response for Microsoft 365 environments, with a mission to stop the most dominant cyberattacks on the planet. Founded by Y Combinator W24 alumni with backgrounds at industry leaders like Abnormal Security, Palo Alto Networks, and Bridgewater, the company has achieved remarkable growth—scaling from its first customer in January 2025 to mid-seven-figures in annual recurring revenue within a year while protecting over 1.6 million users across more than 10,000 businesses. Positioned as a secret weapon for high-growth managed service providers, Petra wins over 90% of head-to-head competitive evaluations and maintains premium pricing with extremely low customer churn. The lean, fast-growing team of around 15 people is based in the San Francisco Bay Area and is targeting 20 million dollars in revenue within the next 12 months.

Open positions · 10

Company at a glance

Location
San Francisco, United States
Websitepetrasecurity.com
LinkedInLinkedIn

Location

About the Team

Team Distribution

  • Engineering43%
  • Sales & Business Development29%
  • Leadership29%

Where the Team Studied

  1. 1.Duke University
  2. 2.University of California, Berkeley
  3. 3.Northeastern University

Team Worked At

  • Palo Alto Networks
  • Abnormal AI
  • Bridgewater Associates
  • Meta
  • Anduril Industries

Culture & values

Feedback-first culture: people are direct, give feedback constantly, and expect the same in return.

Collaborative environment with youthful energy, with the team mostly in their early-to-mid 20s.

People take their work seriously but don't take themselves too seriously.

High-output, fast-moving startup where everyone contributes to building from zero to one.

In-office energy: Bay Area team members are in the San Francisco office five days a week, fostering tight collaboration.

Small, high-performing team building something extraordinary.

Zero-to-one building: you'll be shaping processes, tools, and strategy alongside the founding team, not inheriting a rigid playbook.

Life at Petra Security

Frequently asked questions

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