What they do:
The control plane for AI agents.
Quick facts:
HQ: San Francisco, CA, United States
Top Cybersecurity Startups in California
This list has 132 startups and was last updated on Oct 15, 2026. 35 of them are hiring right now. Biggest hubs: San Francisco (125), Los Angeles (2), and Palo Alto (2). Largest teams: Vanta, TRM Labs, and Teleport. Latest round: Autonomous Cyber raised $2.55M (Apr 21, 2026).
132 startupsPage 3 of 4
What they do:
Real time intelligence for law enforcement & security teams.
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Security for agents that self-improves
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Your personal context, securely portable across every AI app.
Quick facts:
HQ: San Francisco, CA, United States
What they do:
CrowdStrike for AI Agents
Quick facts:
HQ: San Francisco, CA, United States
What they do:
The world's frontier hacker of AI agents.
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Training company-specific models that approve AI actions.
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Agentic AI Security and Governance
Quick facts:
HQ: San Francisco, CA, United States
What they do:
The Authorization Layer for AI Agents
Quick facts:
HQ: San Francisco, CA, United States
What they do:
AI that finds and fixes OS-level vulnerabilities across device fleets
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Catch wrong LLM answers before your customers do
Quick facts:
HQ: San Francisco, CA, United States
What they do:
Always-on AI security engineer
Quick facts:
HQ: San Francisco, CA, United States
What they do:
We make Privacy Software for SMBs.
Quick facts:
HQ: San Francisco, CA, United States
Sqreen
Acquired
What they do:
Sqreen is the application security platform for the modern enterprise
Quick facts:
HQ: San Francisco, CA, United States
Quick facts:
HQ: Palo Alto, CA, United States
Funding:
$14.8M · Equity · Mar 2026
Quick facts:
HQ: Sunnyvale, CA, United States
Incorporated: 2021
Funding:
$7.5M · Equity · Feb 2026
Quick facts:
HQ: Palo Alto, CA, United States
Incorporated: 2022
Funding:
$5.23M · Debt · Jan 2026
Quick facts:
HQ: Sacramento, CA, United States
Incorporated: 2022
Funding:
$2.55M · SAFE · Apr 2026
Proxy
Acquired
What they do:
Smart ring digital wallet
Quick facts:
HQ: San Francisco, CA, United States
Cognito
Acquired
What they do:
Frictionless, modern identity verification that starts with just a…
Quick facts:
HQ: San Francisco, CA, United States
Authy
Acquired
What they do:
Authy is a Two-Factor Authentication platform for developers
Quick facts:
HQ: San Francisco, CA, United States
SafeBase
Acquired
What they do:
Trust Center platform that scales customer security reviews
Quick facts:
HQ: San Francisco, CA, United States
Optery
Acquired
What they do:
Opt out software that removes your private info from the internet
Quick facts:
HQ: San Francisco, CA, United States
AeroFS
Acquired
What they do:
Secure Enterprise Collaboration.
Quick facts:
HQ: San Francisco, CA, United States
Berbix
Acquired
What they do:
Convert more verified users. Instantly & accurately validate user IDs.
Quick facts:
HQ: San Francisco, CA, United States
Clickfacts
Acquired
What they do:
ClickFacts is a Malware Software Solutions company for buyers and sellers of online media. Its automated plug and play malware discovery solution tests online…
Quick facts:
HQ: San Francisco, CA, United States
Kuna Systems
Acquired
What they do:
We're making a smart, front door camera with intercom that lets you…
Quick facts:
HQ: San Francisco, CA, United States
Final
Acquired
What they do:
A credit card that drastically reduces payment fraud and gives…
Quick facts:
HQ: San Francisco, CA, United States
Smyte
Acquired
What they do:
Smyte stops bad actors on social networks and marketplaces.
Quick facts:
HQ: San Francisco, CA, United States
Templarbit
Acquired
What they do:
Protecting applications from malicious activity
Quick facts:
HQ: San Francisco, CA, United States
Foxpass
Acquired
What they do:
Making enterprise security practices available for all companies.
Quick facts:
HQ: San Francisco, CA, United States
Vectrix
Acquired
What they do:
Scan your SaaS apps and instantly identify security issues
Quick facts:
HQ: San Francisco, CA, United States
Telivy
Acquired
What they do:
Automate your cyber security risk assessments
Quick facts:
HQ: San Francisco, CA, United States
Keyri
Acquired
What they do:
Secure fraud prevention and authentication platform for developers
Quick facts:
HQ: San Francisco, CA, United States
EdgeBit
Acquired
What they do:
Autofix your software dependencies
Quick facts:
HQ: San Francisco, CA, United States
Meldium
Acquired
What they do:
Simple password & identity management for teams. Acquired by LogMeIn…
Quick facts:
HQ: San Francisco, CA, United States