# Certificate Expiry Monitor vs TrustFour T4 Control Plane: side-by-side comparison (2026)

[Certificate Expiry Monitor](https://cybersectools.com/tools/certificate-expiry-monitor) is a free [certificate lifecycle management](https://cybersectools.com/categories/clm) solution. [TrustFour T4 Control Plane](https://cybersectools.com/tools/trustfour-t4-control-plane) is a commercial [certificate lifecycle management](https://cybersectools.com/categories/clm) solution by [TrustFour](https://cybersectools.com/companies/trustfour). Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | Certificate Expiry Monitor | TrustFour T4 Control Plane |
|---|---|---|
| Pricing model | Free | Commercial |
| Category | Certificate Lifecycle Management | Certificate Lifecycle Management |
| Verified | No | No |
| Deployment type | On-Premises | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | 168 | – |
| Last commit | Jun 2022 | – |
| Company | – | TrustFour |
| Headquarters | – | – |

### Use cases and capabilities

| | Certificate Expiry Monitor | TrustFour T4 Control Plane |
|---|---|---|
| Kubernetes | Yes | – |
| TLS | Yes | Yes |
| SSL | Yes | Yes |
| Alerting | Yes | Yes |
| NIST | – | Yes |
| Encryption | – | Yes |
| Configuration Management | – | Yes |
| Anomaly Detection | – | Yes |
| Key Management | – | Yes |
| Crypto | – | Yes |
| Network Monitoring | – | Yes |

### Core features

**Certificate Expiry Monitor**

No features listed.

**TrustFour T4 Control Plane**

10 features listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [Certificate Expiry Monitor](https://cybersectools.com/tools/certificate-expiry-monitor) fits if you need to run it on your own servers, you are a small business, you need a free product and you want an open-source product.
- [TrustFour T4 Control Plane](https://cybersectools.com/tools/trustfour-t4-control-plane) fits if you want a cloud product.

## Certificate Expiry Monitor vs TrustFour T4 Control Plane FAQ

Common questions when comparing Certificate Expiry Monitor vs TrustFour T4 Control Plane for certificate lifecycle management.

### What is the difference between Certificate Expiry Monitor and TrustFour T4 Control Plane?

**Certificate Expiry Monitor**: A Docker-based utility that monitors TLS certificate expiration dates and exposes the data as Prometheus metrics with support for Kubernetes ingress discovery and configurable domain filtering.

**TrustFour T4 Control Plane**: TLS compliance monitoring and management platform aligned to NIST 800-52R2, built by TrustFour.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes Certificate Expiry Monitor and TrustFour T4 Control Plane?

**Certificate Expiry Monitor** is open-source with 168 GitHub stars. **TrustFour T4 Control Plane** is made by TrustFour. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Certificate Expiry Monitor a good alternative to TrustFour T4 Control Plane?

Often, yes. Certificate Expiry Monitor and TrustFour T4 Control Plane are both Certificate Lifecycle Management products, and both cover TLS, SSL, Alerting. Key differences: Certificate Expiry Monitor is Free while TrustFour T4 Control Plane is Commercial, Certificate Expiry Monitor is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Certificate Expiry Monitor vs Evertrust](https://cybersectools.com/compare/certificate-expiry-monitor-vs-evertrust)
- [Certificate Expiry Monitor vs Entrust Certificate Manager](https://cybersectools.com/compare/certificate-expiry-monitor-vs-entrust-certificate-manager)
- [Certificate Expiry Monitor vs Allegro RomCert](https://cybersectools.com/compare/allegro-romcert-vs-certificate-expiry-monitor)
- [TrustFour T4 Control Plane vs Evertrust](https://cybersectools.com/compare/evertrust-vs-trustfour-t4-control-plane)
- [TrustFour T4 Control Plane vs Entrust Certificate Manager](https://cybersectools.com/compare/entrust-certificate-manager-vs-trustfour-t4-control-plane)
- [TrustFour T4 Control Plane vs Allegro RomCert](https://cybersectools.com/compare/allegro-romcert-vs-trustfour-t4-control-plane)

## Alternatives to each

- [See all Certificate Expiry Monitor alternatives](https://cybersectools.com/alternatives/certificate-expiry-monitor)
- [See all TrustFour T4 Control Plane alternatives](https://cybersectools.com/alternatives/trustfour-t4-control-plane)

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Source: https://cybersectools.com/compare/certificate-expiry-monitor-vs-trustfour-t4-control-plane

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/certificate-expiry-monitor.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Certificate Expiry Monitor and TrustFour T4 Control Plane: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md