Looking to Level Up +1 Your Players' Experience?
Try Grim Anticheat For Minecraft Java Edition (1.8-1.21)

Open Source
Rather than relying on bypassable tricks, Grim Anticheat simulates the client and does calculations using
cold, hard math. All the checks run on netty threads, ensuring a seamless and lag-free experience.
Additionally supports Folia & MultiPaper.
What makes Grim different?
Grim accounts for every change across different versions of Minecraft. Supporting all versions from 1.8 to 1.21.
- Asynchronous movement processing
- Real multi-threading
- Efficient world replication through packet compression
- Highly efficient, small performance overhead
- Ground-breakingly precise player movement replication
- Lag compensation for all player interactions
Our advanced system ensures a seamless and lag-free experience, allowing you to scale to any size.
Supported platforms
In addition to supporting Spigot, Paper, and most of its forks, we also support Folia and MultiPaper, with additional support for Fabric and other platforms coming.