Start with ownership: where the software runs, who patches it, how you recover it and whether the license covers the features your environment needs. This collection helps technical teams identify open-source candidates without treating a public repository as proof of production readiness.
For developers, platform engineers, SREs, sysadmins and security teams evaluating software they may need to operate themselves.
Shortlist by workload and failure mode first. Then compare release cadence, upgrade path, observability, backup support, authentication and the availability of commercial support.
Directory fields in this matrix were refreshed through October 3, 2026. Follow each source link for current vendor information.
| Tool | Deployment | Source model | API | Pricing model | Primary source |
|---|---|---|---|---|---|
| Zabbix | Self-hosted | Open source | Available | open source | Official source ↗ |
| ZeroTier | Self-hosted | Open source | Available | freemium | Official source ↗ |
| Zitadel | Self-hosted | Open source | Available | open source | Official source ↗ |
| zrok | Self-hosted | Open source | Available | freemium | Official source ↗ |
ZabbixMonitoring & ObservabilityZabbix monitors servers, network devices, applications and cloud services using agents, SNMP, and other collection methods, with built-in alerting, templates, and high-availability clustering.
ZeroTier creates encrypted, software-defined virtual networks that let devices in different locations join the same virtual LAN, with a free tier for small networks and paid plans for larger ones.
ZitadelIdentity & Access ManagementZitadel is an open-source identity and access management platform with passwordless auth, multi-tenancy, and custom workflows. It's free up to 100 daily active users, with cloud Pro plans from $100/month and a self-hosted deployment option.
zrok shares local services, files, and network resources over the internet without opening firewall ports. Built on OpenZiti's zero-trust networking fabric. Fully self-hostable ngrok alternative.