13 open-source Cybersecurity vendors
Open-source software for Cybersecurity that you can self-host, with auditable source code — regardless of the developer's headquarters.
- vendors scored
- 13
- European
- 11
- last checked
- 11 October 2026
Vendors, scored
Score per vendor: 0 = high exposure, 100 = sovereign
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- Sovereignty score 94 out of 100CrowdSecFrance · EU sovereignFrench open-source collaborative intrusion prevention system
- Sovereignty score 94 out of 100GreenboneGermany · EU sovereignGerman vulnerability management.
- Sovereignty score 94 out of 100InmantaBelgium · Self-hosted / open sourceBelgian platform for network automation and service orchestration for telecom and service providers
- Sovereignty score 94 out of 100MISPLuxembourg · Self-hosted / open sourceEU threat sharing platform; self-host.
- Sovereignty score 94 out of 100NetBirdGermany · EU sovereignEU WireGuard-based ZTNA/VPN control plane.
- Sovereignty score 94 out of 100OpenCTIFrance · EU sovereignFrench threat intelligence platform; self-host.
- Sovereignty score 94 out of 100PadlocGermany · EU sovereignGerman password manager; self-host.
- Sovereignty score 94 out of 100PassboltLuxembourg · Self-hosted / open sourceLuxembourg-based open-source credential manager (AGPL-3.0) by Passbolt SA, aimed at IT and DevOps teams; self-hosted or via Passbolt Cloud with EU hosting
- Sovereignty score 94 out of 100TenzirGermany · Self-hosted / open sourceGerman company offering a security data pipeline platform for telemetry; the core engine is open source.
- Sovereignty score 94 out of 100WireGuardGermany · Self-hosted / open sourceVPN protocol; self-host.
- Sovereignty score 82 out of 100Elastic SecurityNetherlands · EU sovereignDutch open-source SIEM and endpoint security powered by Elasticsearch
- Sovereignty score 61 out of 100WazuhUnited States · Non-EU vendorOpen-source unified XDR and SIEM platform
- Sovereignty score 49 out of 100Let's EncryptUnited States · Non-EU vendorAutomated certificate authority for HTTPS certificates, run by US non-profit ISRG (San Francisco); the CA software is open source.
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