Centralizing BorgBackup usually means hand-creating Unix users, wiring SSH keys, and remembering which machine stopped backing up three weeks ago; BorgWarehouse replaces that terminal work with a dashboard built for exactly this job. Add a repository and it provisions the dedicated user, authorized key, and storage quota for you, then hands back ready-to-paste client commands so a new machine is backing up in minutes. Every repository carries a freshness threshold: when no modification lands within the window you set, its status dot turns red and an alert goes out by SMTP email, through Apprise to Discord, Telegram, Slack, Gotify, or ntfy, or as a signed webhook POST to tools like n8n and Uptime Kuma, rate-limited to one alert per repository per day. Append-only mode is enforced on the server, so even a fully compromised client can add archives but never destroy existing ones, which is the property that keeps ransomware from eating your backup history. The monitoring view tracks storage consumption against each quota, a setup wizard walks new clients through onboarding (with a LAN variant for local transfers), and sign-in can delegate to GitHub, Google, Microsoft, GitLab, or any OIDC provider. A versioned REST API automates provisioning, and your passphrase never reaches the server: backups stay end-to-end encrypted on the clients. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.