KastellofficialSecurityMonitoringCloud PlatformskastelldevAlicenseAqualityAmaintenanceServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode. Updated 6 days ago (2026-09-28 23:58 UTC)17353 npm59Apache 2.0