Open source focus

Open Source Alternatives to Bulletproof

19 open source Cybersecurity options similar to Bulletproof, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Umbrasec9
Cybersecurity
Independent defensive security research focused on detection engineering, threat analysis, and open-source tooling for defenders.
Open source
Socket64
Software Supply Chain SecuritySan Francisco, United States$60.0M
Socket is a software supply chain security company that proactively blocks malicious open-source packages and extensions in AI-driven software development.
Open source
Backslash Security56
CybersecurityTel Aviv, Israel$27.0M
Agentic endpoint security for AI coding, providing visibility, governance, and real-time protection.
Open source
ARMO56
EnterpriseTel Aviv, Israel$34.5M
ARMO provides an open-source Kubernetes security platform, Kubescape, for end-to-end security from development to production.
Open source · Self-hostable
OWASP38
CybersecurityRaleigh, USA
A global non-profit foundation dedicated to improving software security through open community collaboration.
Open source · Self-hostable
0sec11
Cybersecurity
An applied cybersecurity research lab using AI agents to autonomously discover, exploit, and verify software vulnerabilities.
Open source · Self-hostable
Snyk76
AI Coding AssistantBoston, United States$488.5M
Snyk is a developer security platform that helps software teams find and fix vulnerabilities in code, open source dependencies, containers, and cloud infrastructure.
Open source · Self-hostable
Falco10
Cybersecurity
Open-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.
Open source · Self-hostable
Chainguard62
CybersecuritySeattle, United States$385.0M
Secures the software supply chain with verifiable builds and open-source security tooling.
Open source · Self-hostable
ORY47
Identity & Access ManagementBerlin, Germany$17.0M
Open-source identity and authorization services for applications, offering composable and scalable IAM solutions.
Open source · Self-hostable
Slauth.io43
EnterpriseAshburn, United States$1.5M
Ark Infotech offers Cybersecurity, AI/ML, Data Analytics, and IT consulting services, including the Slauth.io IAM Policy Copilot.
Open source · Self-hostable
Probo58
SMB SoftwareTel Aviv, Israel$2.5M
Open-source compliance solution for startups to achieve SOC 2, ISO 27001, and HIPAA.
Open source · Self-hostable
Puck52
Endpoint SecurityUnited States
Open-source, AI-driven endpoint investigation tool for security teams.
Open source · Self-hostable
Openthreatgrid8
Cybersecurity
Open honeynet telemetry, responsible threat intelligence sharing, and reproducible security research workflows for defenders and researchers.
Open source
Kryptvakt8
Cybersecurity
Kryptvakt offers a secure, decentralized platform for managing and sharing sensitive data.
Open source
Gako7
Cybersecurity
Open-source, self-hostable secret manager where the server cannot read your secrets.
Open source · Self-hostable
Zsvirt2
Open Source
A production-ready, lightweight open-source virtualization platform for environments from homelabs to hyperscale infrastructure.
Open source
Logz.io63
EnterpriseTel Aviv, Israel$132.0M
Logz.io provides an observability platform for cloud-native businesses, combining open-source tools for monitoring and security.
Open source · Self-hostable
Outshift19
Agentic AI
Cisco's internal incubation engine for emerging technologies like agentic AI and quantum networking.
Open source · Self-hostable

Company	Sector	License	HQ	Funding	Score
UmbrasecIndependent defensive security research focused on detection engineering, threat analysis, and open-source tooling for defenders.	Cybersecurity	Open source	—	—	9
SocketSocket is a software supply chain security company that proactively blocks malicious open-source packages and extensions in AI-driven software development.	Software Supply Chain Security	Open source	San Francisco, United States	$60.0M	64
Backslash SecurityAgentic endpoint security for AI coding, providing visibility, governance, and real-time protection.	Cybersecurity	Open source	Tel Aviv, Israel	$27.0M	56
ARMOARMO provides an open-source Kubernetes security platform, Kubescape, for end-to-end security from development to production.	Enterprise	Open source · Self-hostable	Tel Aviv, Israel	$34.5M	56
OWASPA global non-profit foundation dedicated to improving software security through open community collaboration.	Cybersecurity	Open source · Self-hostable	Raleigh, USA	—	38
0secAn applied cybersecurity research lab using AI agents to autonomously discover, exploit, and verify software vulnerabilities.	Cybersecurity	Open source · Self-hostable	—	—	11
SnykSnyk is a developer security platform that helps software teams find and fix vulnerabilities in code, open source dependencies, containers, and cloud infrastructure.	AI Coding Assistant	Open source · Self-hostable	Boston, United States	$488.5M	76
FalcoOpen-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.	Cybersecurity	Open source · Self-hostable	—	—	10
ChainguardSecures the software supply chain with verifiable builds and open-source security tooling.	Cybersecurity	Open source · Self-hostable	Seattle, United States	$385.0M	62
ORYOpen-source identity and authorization services for applications, offering composable and scalable IAM solutions.	Identity & Access Management	Open source · Self-hostable	Berlin, Germany	$17.0M	47
Slauth.ioArk Infotech offers Cybersecurity, AI/ML, Data Analytics, and IT consulting services, including the Slauth.io IAM Policy Copilot.	Enterprise	Open source · Self-hostable	Ashburn, United States	$1.5M	43
ProboOpen-source compliance solution for startups to achieve SOC 2, ISO 27001, and HIPAA.	SMB Software	Open source · Self-hostable	Tel Aviv, Israel	$2.5M	58
PuckOpen-source, AI-driven endpoint investigation tool for security teams.	Endpoint Security	Open source · Self-hostable	United States	—	52
OpenthreatgridOpen honeynet telemetry, responsible threat intelligence sharing, and reproducible security research workflows for defenders and researchers.	Cybersecurity	Open source	—	—	8
KryptvaktKryptvakt offers a secure, decentralized platform for managing and sharing sensitive data.	Cybersecurity	Open source	—	—	8
GakoOpen-source, self-hostable secret manager where the server cannot read your secrets.	Cybersecurity	Open source · Self-hostable	—	—	7
ZsvirtA production-ready, lightweight open-source virtualization platform for environments from homelabs to hyperscale infrastructure.	Open Source	Open source	—	—	2
Logz.ioLogz.io provides an observability platform for cloud-native businesses, combining open-source tools for monitoring and security.	Enterprise	Open source · Self-hostable	Tel Aviv, Israel	$132.0M	63
OutshiftCisco's internal incubation engine for emerging technologies like agentic AI and quantum networking.	Agentic AI	Open source · Self-hostable	—	—	19