GK AntiCheat vs GuardAC

GK AntiCheat is a Minecraft server plugin that checks players to deter hacked clients from entering a server. Its listed verification flow asks a player to send a random code using a .say command supplied through tellraw. Administration commands cover help, configuration reloads, whitelist changes, and player-record checks. Detection targets include hacked clients and spamming bots, with kicking, automatic bans, and whitelist exclusion listed as enforcement actions; automatic bot kicking is still being tested. The plugin is listed for Spigot and tested on Minecraft versions 1.8 through 1.16, though its native major version is Legacy, below 1.13. Configuration languages include German and Chinese, and compatibility is listed with SkillAPI, other skill plugins, and other anti-cheat plugins. The author says it is mainly for Kit PvP or SkillAPI servers and recommends pairing it with another anti-cheat for survival servers. It has a free plan and paid access from $4.99 one-time. The author also warns that some hacked clients can bypass it and that update time is limited.

GuardAC is a cloud anti-cheat for Minecraft servers that looks for KillAura, aim assist, and unusual combat crosshair movement. It runs server-side, so players install nothing. During fights, the plugin sends a short set of crosshair-movement numbers to the cloud rather than video. The system learns a player's usual mouse movement and can flag changes in that style during a session. Staff receive alerts with a player name and score, and can handle punishment manually or automate it. Configurable thresholds range from alert-only operation to automatic bans. Listed enforcement actions include logs, kicks, bans, broadcasts, console commands, and optional combat suppression; replay analysis is also listed. The plugin supports Paper, Spigot, Purpur, and Folia servers running Minecraft 1.16 or newer. Supported servers require Java 17 or newer; Minecraft 26.1 and 26.2 require Java 25. The service combines a server plugin with a cloud API accessed using an API key. The free plan is listed at free, and a trial key is issued after sign-up without a card.