KastellofficialSecurityMonitoringCloud PlatformskastelldevAlicenseAqualityBmaintenanceServer security auditing (413 checks, 29 categories), production hardening, and fleet management. Supports Hetzner, DigitalOcean, Vultr, and Linode. Updated 17 days ago (2026-10-06 00:17 UTC)1780 npm60Apache 2.0