Squire.ai
Shut down
What they do:
Never code alone.
Quick facts:
HQ: San Francisco, CA, United States
Top Cybersecurity Startups in San Francisco
This list has 125 startups and was last updated on Oct 15, 2026. 34 of them are hiring right now. Largest teams: Vanta, TRM Labs, and Teleport. Latest round: ZeroPath raised $7.03M (Mar 23, 2026).
125 startupsPage 4 of 4
Tesseral
Shut down
What they do:
The open source platform for managing identity in business software
Quick facts:
HQ: San Francisco, CA, United States
Visual One
Shut down
What they do:
AI for security cameras
Quick facts:
HQ: San Francisco, CA, United States
Bifrost
Shut down
What they do:
Wills and Estate Management for Crypto
Quick facts:
HQ: San Francisco, CA, United States
Bannerman
Shut down
What they do:
Security Guard Company Marketplace
Quick facts:
HQ: San Francisco, CA, United States
SlashAuth
Shut down
What they do:
The solution for fine-grained access control in web3
Quick facts:
HQ: San Francisco, CA, United States
Notebook Labs
Shut down
What they do:
Decentralized, anonymous, and accountable identity on Web3.
Quick facts:
HQ: San Francisco, CA, United States
Patchwork Security
Shut down
What they do:
Security patch notifications for servers. Build it, deploy it, and…
Quick facts:
HQ: San Francisco, CA, United States
Metapacket
Shut down
What they do:
Metapacket is the first selective web gateway that stops malware by…
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HQ: San Francisco, CA, United States
EnvKey
Shut down
What they do:
End-to-end encrypted configuration and secrets management
Quick facts:
HQ: San Francisco, CA, United States
Federacy
Shut down
What they do:
Penetration testing and bug bounty platform.
Quick facts:
HQ: San Francisco, CA, United States
Preclusio
Shut down
What they do:
We help companies comply with privacy laws like GDPR. Many of these…
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HQ: San Francisco, CA, United States
Blyss
Shut down
What they do:
End-to-end encrypted AI.
Quick facts:
HQ: San Francisco, CA, United States
Vizly
Shut down
What they do:
Data to insights in seconds
Quick facts:
HQ: San Francisco, CA, United States
Aedilic
Shut down
What they do:
Open-Source AI-generated image/deepfake detection
Quick facts:
HQ: San Francisco, CA, United States
Traversal Networks
Shut down
What they do:
Enterprise Threat Detection: Tuning, Triage, and Analysis by Experts.
Quick facts:
HQ: San Francisco, CA, United States
Documents.Me
Shut down
What they do:
Client-side encryption for your devices and the cloud.
Quick facts:
HQ: San Francisco, CA, United States
YC W12Early stage