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cert-manager

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Kubernetes add-on for certificates

Free, no paid tier
FreeDevOpsSecurityCloud & Infrastructure
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Reviews onG2
78 reviews tracked

The Bottom Line

Price
Free, no paid tier. Compare plans

Key facts

  • cert-manager is a Kubernetes add-on that automates TLS certificate management
  • It issues and renews certificates from Let's Encrypt and other issuers automatically
  • Completely free and open-source

Pros

  • Kubernetes cert automation
  • Let's Encrypt integration
  • Multiple issuers
  • Active development
  • CNCF project

Cons

  • Kubernetes only
  • Learning curve
  • Debugging complex
  • Documentation dense
  • Configuration tricky

What is cert-manager?

Editorial review
cert-manager automates TLS certificate management for Kubernetes. Request certificates from Let's Encrypt or other CAs, and cert-manager handles issuance, renewal, and secret management automatically. Annotations on Ingress resources trigger certificate creation. Renewal happens before expiration. Multiple issuers support different CAs. Kubernetes operators consider cert-manager essential infrastructure for automated certificate lifecycle management.
how we evaluateSourcecert-manager.io ↗

Ratings Across the Web

4.6(78 reviews)

cert-manager holds an aggregate rating of 4.6 out of 5 from 78 reviews across G2, last checked July 22, 2026.

G278 reviews
4.6/5

Ratings aggregated from independent review platforms. Learn more

Key Features

  • Certificate management
  • Kubernetes native
  • Let's Encrypt
  • Auto-renewal
  • Multiple issuers
  • Open source

Pricing Plans

Pricing checked Oct 1, 2026

cert-manager plans and prices, checked October 2026
PlanPriceDetails
Open SourcePopular

$0

Self-hosted

  • K8s certificates
  • Let's Encrypt
  • Auto-renewal
+1 more
  • Apache 2.0
View full pricing

Is cert-manager worth the price?

Great value

The pricing for cert-manager is exceptionally fair and generous, as the core product is entirely open source and free.

This makes it an outstanding value for any organization needing Kubernetes certificate management without direct cost. It's best for all Kubernetes users, from small startups to large enterprises, who are comfortable with self-hosting and managing open-source solutions.

Reviews

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4.6/5

Across 78 verified user reviews on G2

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Best cert-manager Alternatives

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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cert-manager FAQ

How does cert-manager automate certificate management within Kubernetes?

cert-manager automates TLS certificate management for Kubernetes by handling the issuance, renewal, and secret management of certificates. It triggers certificate creation based on annotations on Ingress resources and ensures renewal occurs before expiration.

What kind of user benefits most from using cert-manager?

cert-manager is primarily beneficial for Kubernetes operators and DevOps teams who need automated certificate lifecycle management. It simplifies the process of securing applications running within a Kubernetes environment.

How is cert-manager priced?

cert-manager is free to use, as it is an open-source project and does not require a paid plan. It is a CNCF project, indicating its community-driven development.

Can cert-manager integrate with various Certificate Authorities?

Yes, cert-manager supports multiple issuers, allowing it to request certificates from various Certificate Authorities, including Let's Encrypt. This flexibility enables users to choose their preferred CA.

What are the main limitations to consider when adopting cert-manager?

A primary limitation of cert-manager is that it is designed exclusively for Kubernetes environments. Users should also be aware of a learning curve, potentially dense documentation, and tricky configuration.

How does cert-manager compare to a tool like Doppler for managing secrets?

cert-manager focuses specifically on automating TLS certificate management within Kubernetes, including issuance and renewal. In contrast, Doppler is a general-purpose secrets management tool that handles various types of secrets across different environments.

Source: cert-manager.io

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