Petra Security

Petra Security

Provides ITDR platform for Microsoft 365

Overview

Petra Security provides an Identity Threat Detection and Response (ITDR) platform for Microsoft 365, designed for MSSPs and organizations. It continuously monitors Microsoft 365 components such as Active Directory, Exchange, SharePoint, and Teams to detect threats like Business Email Compromise and token theft using data science and adaptive fingerprinting. The platform offers rapid onboarding with a two-click integration, quick threat detection, and the ability to lock out attackers without disrupting employee access, plus detailed reporting and security assessments. Petra's goal is to help security teams investigate and shut down Microsoft 365 attacks quickly, improving protection across the Microsoft ecosystem.

YC Company

About Petra Security

Simplify's Rating
Why Petra Security is rated
C+
Rated B on Competitive Edge
Rated B on Growth Potential
Rated D+ on Differentiation

Industries

Data & Analytics

Enterprise Software

Cybersecurity

Company Size

11-50

Company Stage

Seed

Total Funding

$130K

Headquarters

San Francisco, California

Founded

2023

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Simplify's Take

What believers are saying

  • CRN reported on May 28, 2026 that Petra protects 1.5 million users.
  • Petra's July 2026 jobs page listed six openings, including AEs and sales engineers.
  • Ashby's June 2026 posting targets $20M-plus revenue within 12 months.

What critics are saying

  • Petra raised only $500,000 in June 2024; thin capital limits security and sales scale.
  • Huntress ITDR directly targets Petra's Microsoft 365 niche, compressing pricing by 2027.
  • If Microsoft bundles stronger ITDR into Defender, Petra's standalone MSP pitch evaporates.

What makes Petra Security unique

  • Petra's May 2026 behavioral ITDR analyzes 30x more M365 data than location-based rivals.
  • Petra's May 2026 autopsy reconstructs six months of M365 activity within 48 hours.
  • Petra's July 2026 changelog shows cross-tenant phish revocation and direct-send defenses.

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Funding

Total Funding

$130k

Below

Industry Average

Funded Over

1 Rounds

Notable Investors:
Seed funding is usually the first official round after pre-seed, when a startup has a prototype or concept. It’s typically used to develop the product, test the market, and start building the team. Investors here are often angel investors or early-stage venture capitalists.
Seed Funding Comparison
Below Average

Industry standards

$3.3M
$130k
Petra Security
$1.5M
Slack
$2M
Netflix
$2.3M
Instacart
$3M
Robinhood

Benefits

Health Insurance

Dental Insurance

Vision Insurance

Meal Benefits

Commuting Benefits

Equinox discount

Relocation Assistance

Company Equity

Growth & Insights and Company News

Headcount

6 month growth

-12%

1 year growth

-6%

2 year growth

-26%
The Business Journals
Apr 3rd, 2024
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