KastellofficialSecurityMonitoringCloud PlatformskastelldevAlicenseAqualityAmaintenanceServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode. Updated 12 days ago (2026-09-11 00:03 UTC)17180 npm59Apache 2.0