Open source focus

Open Source Alternatives to F Secure

6 open source Cybersecurity options similar to F Secure, 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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Bitwarden57
CybersecuritySanta Barbara, United States$130.0M
Open-source password manager for individuals, teams, and businesses.
Open source · Self-hostable
Backslash Security56
CybersecurityTel Aviv, Israel$27.0M
Agentic endpoint security for AI coding, providing visibility, governance, and real-time protection.
Open source
Fleet Device Management55
CybersecuritySan Francisco, USA$32.0M
Autonomous endpoint management platform to counter AI-accelerated exploits.
Open source · Self-hostable
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

Company	Sector	License	HQ	Funding	Score
BitwardenOpen-source password manager for individuals, teams, and businesses.	Cybersecurity	Open source · Self-hostable	Santa Barbara, United States	$130.0M	57
Backslash SecurityAgentic endpoint security for AI coding, providing visibility, governance, and real-time protection.	Cybersecurity	Open source	Tel Aviv, Israel	$27.0M	56
Fleet Device ManagementAutonomous endpoint management platform to counter AI-accelerated exploits.	Cybersecurity	Open source · Self-hostable	San Francisco, USA	$32.0M	55
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