Cert manager by cert-manager
Automatically provision and manage TLS certificates in Kubernetes
About Cert manager
From the project's README at github.com/cert-manager/cert-manager. Lightly cleaned for readability; for the full source see the upstream repo.
<!-- note that the cert-manager logo in this repo is referred to in other README files in the cert-manager org as well as in Helm charts, etc. if you change its location or name, you'll need to update several other repos too! -->
Health score breakdown
6-dimension composite. See methodology for formula and weights.
Adoption signals
Real-world usage data, pulled from each registry. The bigger the numbers, the more battle-tested the project.
| Signal | Value | Source |
|---|---|---|
| GitHub stars | 14k | github.com/cert-manager/cert-manager |
| GitHub forks | 2.4k | github.com/cert-manager/cert-manager |
Release & maintenance
Is this project actively maintained, or about to die? Check the recency of last commit and last release.
| Project age | 9.0 years | since May 2017 |
| Last commit | 3 days ago | May 4, 2026 |
| Releases shipped | 249 | last: 16 days ago |
| Security policy | SECURITY.md | declared by maintainers |
Self-hosting cost across providers
Detected requirements: 4GB RAM, 40GB disk minimum. Cheapest plan per provider that meets the requirement.
| Provider | Plan | Specs | Monthly | |
|---|---|---|---|---|
| hetzner | CAX11 | 2c · 4GB · 40GB | $4.13 USD | Deploy → |
| vultr | VC2 | 1c · 1GB · 25GB | $5 USD | Deploy → |
| linode | Nanode 1GB | 1c · 1GB · 25GB | $5.12 USD | Deploy → |
| digitalocean | Basic Regular 1GB | 1c · 1GB · 25GB | $6 USD | Deploy → |
Security advisories
CVE-2026-25518. What people say on Hacker News
- Careful upgrading to cert-manager 1.18
- Show HN: Claude plugin to automate Kubebuilder setup
- Show HN: CRD Wizard – A GUI for Kubernetes Custom Resource Definitions
- Generating and using Let's Encrypt wildcard certificates with cert‑manager
- Migrating from Ingress Nginx to Envoy Gateway: Handling Cert-Manager Integration
Ready to self-host Cert manager?
Spin up a hetzner CAX11 (4GB RAM, 40GB disk) for $4.13/mo and follow the project's official install docs.
Data last refreshed May 7, 2026.
Similar open-source projects
Projects in our directory that replace the same SaaS or share topics with Cert manager.