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San Francisco Security 54 startups

"Security" Startups in San Francisco

Every active San Francisco startup we index that carries the "Security" tag.

All startups in San Francisco → "Security" startups nationwide →

Last updated

2026-09-02

Hiring right now 6% 3 of 54

Open roles 132

City San Francisco

Our index currently lists 54 tech startups in San Francisco tagged "Security" — a city×tag slice of the live directory, not every "Security" company nationwide and not every San Francisco startup regardless of tag. 6% of this slice is hiring right now (3 of 54). Apply links on each profile go to the company's own site; we don't act as a middleman. "Security" startups in San Francisco include Vanta, AeroFS, Ambient.ai, Anjuna, and Apozy. Categories represented here: Security, AI / ML, and Infrastructure. YC batches in this slice: S26, S21, W18, and Sp25, among others. Widen the view anytime: all San Francisco startups at /startups/location/san-francisco, or every "Security" company nationwide at /startups/tag/security.

Vanta—the proven leader in automated compliance helping startups…

B2BComplianceSecurity

Secure Enterprise Collaboration.

CollaborationSecurityEnterprise

AI company transforming enterprise physical security to prevent…

Artificial IntelligenceComputer VisionSecurity

Anjuna enabled organizations to trust any infrastructure

Cloud Workload ProtectionSecurity

Apozy makes every website safe to browse

Authy is a Two-Factor Authentication platform for developers

The authentication framework for TypeScript

Developer ToolsSecurityOpen Source

Guarantee your agents use the right evidence before they act.

SaaSComplianceSecurity

Block bots & bad behavior

Developer ToolsSaaSSecurity

The Authorization Layer for AI Agents

Artificial IntelligenceSecurityOpen Source

Cloud and Container Security Platform

Cloud Workload ProtectionDevSecOpsIdentity

Least cost routing system to reduce 80%+ token spend

Artificial IntelligenceDeveloper ToolsB2B

Corgea finds, and fixes insecure code and packages autonomously.

Developer ToolsSaaSSecurity

AI Agents for Security Operations Teams

SaaSComplianceSecurity

Cyble - World’s First Intelligence-Driven, AI-Native Security…

Dyneti Technologies

Reduce payment fraud

PaymentsSecurity

Autofix your software dependencies

DevSecOpsB2BSecurity

A credit card that drastically reduces payment fraud and gives…

PaymentsSecurity

Easiest way to set up Zero Trust Access for your team

DevSecOpsNext-gen Network SecurityB2B

Fuzzing as a Service

SecurityCybersecurity

Agentic AI Security and Governance

Artificial IntelligenceDeveloper ToolsSecurity

AI-powered Application Control

Behavioral intelligence infrastructure for anti-fraud

Unified platform for secrets, certs, and privileged access management

Developer ToolsSaaSB2B

Secure fraud prevention and authentication platform for developers

SaaSB2BSecurity

We're making a smart, front door camera with intercom that lets you…

Smart Home AssistantsIoTSecurity

The sensitive data redaction layer for AI

Artificial IntelligenceB2BCompliance

Secure Collaboration for Technical Teams

DevSecOpsCollaborationSecurity

Simple password & identity management for teams. Acquired by LogMeIn…

SecurityEnterprise

Nebula Security

Autonomous AI defense system for cyber attack

B2BSecurityCybersecurity

Give every employee a secured, sandboxed pro assistant agent

B2BSecurityOpen Source

Opt out software that removes your private info from the internet

SaaSConsumerSecurity

LLM Security and Compliance

Generative AISecurityCybersecurity

Security auditing for Web3

Crypto / Web3Security

Risotto auto-solves IT support requests using AI

Artificial IntelligenceB2BCompliance

AI-native on-call and incident response carefully crafted to help…

AIOpsDeveloper ToolsSaaS

Security for agents that self-improves

Developer ToolsSecurityCybersecurity

Smyte stops bad actors on social networks and marketplaces.

SecurityFraud Detection

Sqreen is the application security platform for the modern enterprise

DevSecOpsB2BSecurity

Security for AI-native developers

Artificial IntelligenceSecurityOpen Source

The guardrail for AI on every device

SaaSB2BCompliance

Automate your cyber security risk assessments

SecurityCybersecurity

Protecting applications from malicious activity

Encrypted AI with verifiable privacy

Artificial IntelligenceDeveloper ToolsSecurity

Tolmo is the AI security platform that secures every layer of cloud…

DevSecOpsSecurityAI

Securing AI native apps directly on devices

Artificial IntelligenceSaaSSecurity

Autonomous offensive security agents. The best defense is offense

Artificial IntelligenceSecurityCybersecurity

Continuous compliance and governance for agents on sensitive systems

B2BComplianceSecurity

Showing 48 of 54 Filter the directory by this slice →

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2 of 4 similar companies are hiring right now · most common: Engineering

Software development platform.

Open SourceDevOpsEnterprise Software

Open source alternative to Auth0 / AWS Cognito / Firebase Auth

Developer ToolsSaaSB2B

Document AI. One API Call.

Artificial IntelligenceComputer VisionFinance

Build in a weekend. Scale to millions.

Developer ToolsOpen SourceBig Data

All startups in San FranciscoEvery tag "Security" startups nationwideEvery city "Artificial Intelligence" startups in San Francisco606 startups "AI" startups in San Francisco572 startups "B2B" startups in San Francisco520 startups "SaaS" startups in San Francisco428 startups "Developer Tools" startups in San Francisco307 startups "Fintech" startups in San Francisco180 startups "Generative AI" startups in San Francisco137 startups "Consumer" startups in San Francisco120 startups

Frequently asked questions

How many "Security" startups are in San Francisco?

Our index currently tracks 54 active tech startups in San Francisco tagged "Security". Counts move as scrapers discover new companies and flag shutdowns inactive.

Which "Security" startups are based in San Francisco?

Companies on this page include Vanta, AeroFS, and Ambient.ai, plus 51 more below. Each profile links to the company's site and any open roles we scrape.

How is this different from the San Francisco startups page or the "Security" tag page?

/startups/location/san-francisco lists every indexed startup in San Francisco across tags. /startups/tag/security lists every "Security" startup nationwide. This page is the intersection — only companies that resolve to both San Francisco and "Security".

Are these San Francisco "Security" startups hiring?

3 of the 54 companies on this page currently have open roles in our jobs index.

How often is this list updated?

Automated scrapers refresh on the same daily cadence as the rest of the directory. The last index update was 2026-09-02.