sslbrain vs. ACME Command-Line Tools
The real alternative to sslbrain is not Certbot. It is the collection of bash scripts, cron jobs, and spreadsheets your team already maintains. Certbot, win-acme and lego are excellent tools. sslbrain handles the ACME protocol against the CA so your servers and network gear get their certificates installed without having to talk to a CA themselves.
Feature Comparison
| Feature | sslbrain | Certbot | win-acme / simple-acme | lego |
|---|---|---|---|---|
| Central management | Yes, web UI | No | No | No |
| Multi-server | Automated fleet-wide | Manual per server | Manual per server | Manual per server |
| Certificate discovery | Network-wide scanning | No | No | No |
| Audit trail | Full RBAC + audit log | Local log per server | Local log per server | Local log per server |
| DNS validation | Auto-DNS and/or DNS API | DNS plugins per provider | DNS plugins per provider | 100+ DNS providers |
| Platform support | All platforms via agents (incl. firewalls, load balancers) | Linux, macOS, Windows | Windows | Linux, macOS, Windows |
| Renewal | Centralized, automatic | Cron per server | Scheduled task per server | Cron per server |
| Setup | Central install, then servers via plan | Per server: client, validation, renewal hook, firewall if needed | Per server: client, validation, renewal hook, firewall if needed | Per server: client, validation, renewal hook, firewall if needed |
| Server and DNS credentials | SSH, REST, WinRM and DNS API credentials in encrypted vault, protected by a cloud key | DNS API keys in plaintext on each server | Passwords in plaintext on each server | API keys in plaintext on each server |
| NIS2 evidence | Central audit log, RBAC, evidence export | Per-server log, no central policy. DNS or SSH credentials live on each server. | Per-server log, no central policy. DNS or admin credentials live on each server. | Per-server log, no central policy. DNS or SSH credentials live on each server. |
| 47-day certificates | Central scheduler renews in batches and retries on failure | 12 renewals per certificate per year, each server renews alone | 12 renewals per certificate per year, each server renews alone | 12 renewals per certificate per year, each server renews alone |
Central management
sslbrain Yes, web UI
Certbot No
win-acme / simple-acme No
lego No
Multi-server
sslbrain Automated fleet-wide
Certbot Manual per server
win-acme / simple-acme Manual per server
lego Manual per server
Certificate discovery
sslbrain Network-wide scanning
Certbot No
win-acme / simple-acme No
lego No
Audit trail
sslbrain Full RBAC + audit log
Certbot Local log per server
win-acme / simple-acme Local log per server
lego Local log per server
DNS validation
sslbrain Auto-DNS and/or DNS API
Certbot DNS plugins per provider
win-acme / simple-acme DNS plugins per provider
lego 100+ DNS providers
Platform support
sslbrain All platforms via agents
Certbot Linux, macOS, Windows
win-acme / simple-acme Windows
lego Linux, macOS, Windows
Renewal
sslbrain Centralized, automatic
Certbot Cron per server
win-acme / simple-acme Scheduled task per server
lego Cron per server
Setup
sslbrain Central install, servers via plan
Certbot Per server: client, validation, hook
win-acme / simple-acme Per server: client, validation, hook
lego Per server: client, validation, hook
Server and DNS credentials
sslbrain Encrypted vault, cloud-key protected
Certbot Plaintext per server
win-acme / simple-acme Plaintext per server
lego Plaintext per server
NIS2 evidence
sslbrain Central audit log + RBAC + evidence export
Certbot Per-server log, distributed credentials
win-acme / simple-acme Per-server log, distributed credentials
lego Per-server log, distributed credentials
47-day certificates
sslbrain Central scheduler with retry
Certbot 12 renewals/cert/year
win-acme / simple-acme 12 renewals/cert/year
lego 12 renewals/cert/year
When to Use What
Use Certbot, win-acme, or lego when:
- You have 1-5 servers with the same OS
- You already manage them via SSH or Ansible
- You run Kubernetes or ephemeral containers (use cert-manager)
- You do not need centralized visibility or audit logging
Use sslbrain when:
- You manage certificates across multiple servers or environments
- You need a mix of free ACME certificates and commercial OV/EV certificates
- You want a central dashboard showing every certificate across your infrastructure
- You want SSH, REST, WinRM and DNS API credentials in a central encrypted vault, not in plaintext on every server
- You want to stop logging into each server to check certificate expiry dates
- You need DNS-01 validation without configuring DNS API credentials on every server
- You install on Kemp, NetScaler, Cisco FDM, FortiGate, Exchange edge in DMZ, Microsoft WAP, Tomcat or Navision
All three approaches solve certificate automation. For a single server, an ACME client is the simplest choice. sslbrain adds value when you have multiple servers, mixed infrastructure or compliance requirements.
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