The Cosmic Herald

Our newest addition: CertFu

January 16, 2026

We’re pleased to announce our latest service… CertFu!

CertFu is an ACME-enabled Private CA.

When running modern infrastructure, the goal should be for all services to be protected by TLS. Oftentimes this is more difficult than it looks. Private IPs. Private domain names. IP-only access. Not to mention all those renewals!

Public ACME services likes Let’s Encrypt solve the renewals, but your ACME server needs to handle those private IPs and domains too.

And what about manageability and oversight? As a general rule, ACME servers provide little to no oversight about what certs were issued, when, and by whom.

CertFu solves all of this.

  • ACME - Use modern ACME tooling to fully automate renewals. Once setup, mark cert renewals off your list. Forever.
  • Any domain, any IP - Issue certs for private domains or IPs. Routable or non-routable.
  • Issuance policies - Restrict what certs are allowed to be issued. Authorize by IP, domain, CAA tags, and more.
  • Manageability - Every server/host has its own, unique account key. Authorize and track each host and revoke access when no longer needed.
  • Oversight - Know what certs were issued, when, and by whom.
  • Privacy - Avoid publishing your internal domains and subdomains into public certificate logs.
  • Online root CAs - Use an online root for maximum convenience: CertFu will handle all the intermediate CAs for you.
  • Offline root CAs - Maintain sole control of your root CA and just give CertFu an intermediate CA instead.
  • Multiple directories - Isolate certs (and permissions) for production, staging, QA/tests, etc.

Start a trial, Learn more, or Send us your questions.