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DefDex
depthfirst logo

Startup · United States

depthfirst

HQ San FranciscoFounded 202411-50 employees

AI-native security that thinks like an elite security research team and works across your code, dependencies, infrastructure, and live environment.

Website

Funding2 rounds · $120M

Equity raised
$120M
Latest
$80.0MSeries B · Mar 31, 2026
Last valuation
$580M?Basis not stated · Series B · Mar 31, 2026
Cumulative raised$120M
Jan 14, 2026Mar 31, 2026

Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.

Systems7

Agentic Pentester

Depthfirst software for testing running applications to assess reported vulnerabilities.

Maturity not rated

Code Scanner

Depthfirst software for analyzing code, business logic, and data flows for potential vulnerabilities.

Maturity not rated

Dependency Firewall

Depthfirst software for inspecting software packages for potentially malicious behavior.

Maturity not rated

dfs-large1

A security model for vulnerability discovery and validation across enterprise repositories.

Maturity not rated

Secrets & Sensitive Data

Depthfirst module for identifying credentials and sensitive data in code and development environments.

Maturity not rated

Security Reviewer

Depthfirst software for reviewing code changes for security issues and proposing fixes.

Maturity not rated
View all 7 systems →

Newest unveiled first. Open a system for its milestone timeline, components and sources.

Hiring Observations10 observed listings

  • Account Executive ↗

    San Francisco, On Site · Full Time · Commercial

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Analytics & GTM Operations Lead ↗

    San Francisco, On Site · Full Time · Other

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Backend Engineer ↗

    San Francisco, On Site · Full Time · Engineering

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Designer (Product + Brand) ↗

    San Francisco, On Site · Full Time · Other

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Forward-Deployed Security Engineer ↗

    San Francisco, On Site · Full Time · Engineering

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • GTM Engineer ↗

    San Francisco, On Site · Full Time · Engineering

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Product Engineer ↗

    San Francisco, On Site · Full Time · Engineering

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Product Manager ↗

    San Francisco, On Site · Full Time · Other

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Product Marketing Lead ↗

    San Francisco, On Site · Full Time · Commercial

    Open when checked · Company careers page

    Checked Oct 13, 2026

  • Recruiter ↗

    San Francisco, On Site · Full Time · Other

    Open when checked · Company careers page

    Checked Oct 13, 2026

A sample of observed listings, not a total vacancy count. Availability may have changed since collection. Categories are inferred from job titles.

Sources11

Show all 11 sources and supporting evidence

Profile3

  1. 1

    PitchBook · Supports Organization · employee range, Organization · founded year, Organization · linkedin url, Organization · x url

    “employee_range: 11-50 (profile: 25)”
  2. 2

    Sixth-Domain · Supports Organization · country, Organization · kind

    “{"country": "USA", "hq_iso2": "US", "id": "78d40b7c-a8ed-45ae-b0e9-031a317b1d13"}”
  3. 3

    LinkedIn · Supports Organization · hq city, Organization · linkedin url

    “hq_city: San Francisco”

Systems2

  1. 4

    depthfirst · Supports Organization · description, Organization · name, Organization · website, System

    “AI-native security that thinks like an elite security research team and works across your code, dependencies, infrastructure, and live environment.”
  2. 5

    depthfirst · Supports System

    “dfs-large1 is our most capable model to date, designed for vulnerability discovery and validation across large enterprise repositories.”

Funding4

  1. 6

    depthfirst · Mar 31, 2026 · Supports Funding round, Funding round · amount, Organization · ownership

    “emerged from stealth with $40M in Series A funding”
  2. 7

    Forbes · Mar 31, 2026 · Supports Funding round · post money valuation usd

    “announced an $80 million raise at a $580 million valuation”
  3. 8

    depthfirst · Jan 14, 2026 · Supports Funding round · amount

    “depthfirst, an applied AI lab shaping the future of software security, today announced its $40M Series A round, led by Accel with participation from Alt Capital, BoxGroup, Liquid 2 Ventures, Mantis VC, SV Angel, and notable angel investors including Jeff Dean, Kirsten Green, Colin Evans, Logan Kilpatrick, and Julian Schrittwieser.”
  4. 9

    TechCrunch · Jan 14, 2026 · Supports Funding round, Funding round · amount

    “the company raised the round from Accel Partners, which led the investment, with participation from SV Angel, Mantis VC, and Alt Capital”

People1

  1. 10

    Crunchbase · Supports Organization · employee range, Organization · hq city, Organization · linkedin url, Organization · x url, Role

    “employee_range: 11-50 (profile: 11-50)”

Other1

  1. 11

    Supports Job posting

    “Technical Account Manager Sales, San Francisco, On Site, Full Time”

Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.