Open source focus

Open Source Alternatives to Cerbera

24 open source Cybersecurity options similar to Cerbera, 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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Backslash Security56
CybersecurityTel Aviv, Israel$27.0M
Agentic endpoint security for AI coding, providing visibility, governance, and real-time protection.
Open source
Puck52
Endpoint SecurityUnited States
Open-source, AI-driven endpoint investigation tool for security teams.
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
Falco10
Cybersecurity
Open-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.
Open source · Self-hostable
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
Canonical61
Open SourceLondon, United Kingdom$348K
Canonical develops and supports Ubuntu, a leading open-source operating system for cloud, servers, and edge devices.
Open source · Self-hostable
CIQ59
Artificial IntelligenceReno, United States$26.0M
Sponsors of OpenWALDO, a community-driven initiative for open-source AI training data, and provider of enterprise Linux, HPC, and AI infrastructure software.
Open source
Fleet Device Management55
CybersecuritySan Francisco, USA$32.0M
Autonomous endpoint management platform to counter AI-accelerated exploits.
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
I3
i313
Software Development
A highly configurable and efficient tiling window manager for X11.
Open source · Self-hostable
Umbrasec9
Cybersecurity
Independent defensive security research focused on detection engineering, threat analysis, and open-source tooling for defenders.
Open source
Openthreatgrid8
Cybersecurity
Open honeynet telemetry, responsible threat intelligence sharing, and reproducible security research workflows for defenders and researchers.
Open source
GrapheneOS
Operating SystemToronto, Canada
A privacy and security-focused mobile operating system based on Android.
Open source · Self-hostable
Polars47
Data Manipulation$21.0M
An open-source, high-performance DataFrame library for Rust and Python, designed for efficient data manipulation and analysis.
Open source · Self-hostable
SmythOS45
Agentic AISan Francisco, United States
Open-source AI operating system for launching and scaling specialized AI agent networks.
Open source · Self-hostable
Node.js26
Software Development
An open-source, cross-platform JavaScript runtime environment.
Open source · Self-hostable
Realnas19
Open Source
Open-source Network Attached Storage (NAS) operating system based on FreeBSD, managing ZFS, SMB, NFS, users, snapshots, and boot environments.
Open source · Self-hostable
Linuxed19
Enterprise Software
Linuxed provides an AI-powered platform for Linux system administration, automation, and infrastructure management.
Open source · Self-hostable
Whonix9
Operating System
A free, open-source, and hardened Linux distribution for advanced anonymity and security online.
Open source
KubeVirt9
Cloud Computing
Container-native virtualization for Kubernetes, enabling VMs and containers to run side-by-side.
Open source · Self-hostable
Swindex7
Database
Microsecond multi-hop graph queries with a source-available Rust crate.
Open source
TypeScript7
Developer ToolsRedmond, United States
A strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.
Open source
Cadenceos6
Operating System
CadenceOS is an open-source operating system designed for web-based applications and cloud-native environments, offering a secure and flexible platform.
Open source · Self-hostable
RU
Rubish
Software Development
A UNIX shell written entirely in Ruby, offering deep integration with Ruby code.
Open source

Company	Sector	License	HQ	Funding	Score
Backslash SecurityAgentic endpoint security for AI coding, providing visibility, governance, and real-time protection.	Cybersecurity	Open source	Tel Aviv, Israel	$27.0M	56
PuckOpen-source, AI-driven endpoint investigation tool for security teams.	Endpoint Security	Open source · Self-hostable	United States	—	52
0secAn applied cybersecurity research lab using AI agents to autonomously discover, exploit, and verify software vulnerabilities.	Cybersecurity	Open source · Self-hostable	—	—	11
FalcoOpen-source, cloud-native runtime security tool for detecting anomalous application behavior across hosts, containers, and Kubernetes.	Cybersecurity	Open source · Self-hostable	—	—	10
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
CanonicalCanonical develops and supports Ubuntu, a leading open-source operating system for cloud, servers, and edge devices.	Open Source	Open source · Self-hostable	London, United Kingdom	$348K	61
CIQSponsors of OpenWALDO, a community-driven initiative for open-source AI training data, and provider of enterprise Linux, HPC, and AI infrastructure software.	Artificial Intelligence	Open source	Reno, United States	$26.0M	59
Fleet Device ManagementAutonomous endpoint management platform to counter AI-accelerated exploits.	Cybersecurity	Open source · Self-hostable	San Francisco, USA	$32.0M	55
OWASPA global non-profit foundation dedicated to improving software security through open community collaboration.	Cybersecurity	Open source · Self-hostable	Raleigh, USA	—	38
I3i3A highly configurable and efficient tiling window manager for X11.	Software Development	Open source · Self-hostable	—	—	13
UmbrasecIndependent defensive security research focused on detection engineering, threat analysis, and open-source tooling for defenders.	Cybersecurity	Open source	—	—	9
OpenthreatgridOpen honeynet telemetry, responsible threat intelligence sharing, and reproducible security research workflows for defenders and researchers.	Cybersecurity	Open source	—	—	8
GrapheneOSA privacy and security-focused mobile operating system based on Android.	Operating System	Open source · Self-hostable	Toronto, Canada	—	—
PolarsAn open-source, high-performance DataFrame library for Rust and Python, designed for efficient data manipulation and analysis.	Data Manipulation	Open source · Self-hostable	—	$21.0M	47
SmythOSOpen-source AI operating system for launching and scaling specialized AI agent networks.	Agentic AI	Open source · Self-hostable	San Francisco, United States	—	45
Node.jsAn open-source, cross-platform JavaScript runtime environment.	Software Development	Open source · Self-hostable	—	—	26
RealnasOpen-source Network Attached Storage (NAS) operating system based on FreeBSD, managing ZFS, SMB, NFS, users, snapshots, and boot environments.	Open Source	Open source · Self-hostable	—	—	19
LinuxedLinuxed provides an AI-powered platform for Linux system administration, automation, and infrastructure management.	Enterprise Software	Open source · Self-hostable	—	—	19
WhonixA free, open-source, and hardened Linux distribution for advanced anonymity and security online.	Operating System	Open source	—	—	9
KubeVirtContainer-native virtualization for Kubernetes, enabling VMs and containers to run side-by-side.	Cloud Computing	Open source · Self-hostable	—	—	9
SwindexMicrosecond multi-hop graph queries with a source-available Rust crate.	Database	Open source	—	—	7
TypeScriptA strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.	Developer Tools	Open source	Redmond, United States	—	7
CadenceosCadenceOS is an open-source operating system designed for web-based applications and cloud-native environments, offering a secure and flexible platform.	Operating System	Open source · Self-hostable	—	—	6
RURubishA UNIX shell written entirely in Ruby, offering deep integration with Ruby code.	Software Development	Open source	—	—	—