Certificate lifetimes are collapsing toward 47 days, which turns TLS from a yearly chore into a weekly one, and CertMate is the control plane that makes that schedule boring. It issues and renews certificates from Let's Encrypt, ZeroSSL, Google Trust Services, Actalis, DigiCert, SSL.com, Sectigo, or your own private CA, validating by DNS-01 through 29 DNS providers, HTTP-01, or a CSR whose private key never leaves the device. Renewals run automatically, earlier when a certificate's life is short or the CA moves the date through ARI, and deploy hooks push each renewed certificate where it is actually served, then probe the live endpoint to prove the new certificate answers. Discovery watches hosts and certificate transparency logs for certificates you did not issue, folding them into one inventory of what is served where and when it expires. Certificates rest on local disk or in Azure Key Vault, AWS Secrets Manager, HashiCorp Vault, Infisical, or S3 storage, with encrypted backups copied off-site. Its built-in CA issues client certificates for mTLS with OCSP and CRL, and can serve ACME itself, so certbot, lego, acme.sh, and cert-manager get internal certificates under EAB rules you define. Every action lands in a tamper-evident, hash-chained audit trail you can export and verify independently. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.