Simply Hardcore is a straight up Minecraft hardcore server for players who want a real challenge.
It is true hardcore survival with simple rules and no pay to win stuff. The moderation is active and fair so it feels competitive but not toxic.
The community is pretty active with over 100 people in the Discord and it can hit up to 20 players online at once. If you want hardcore without extra gimmicks this one keeps it simple.
No Frills Hardcore Survival Challenge
GG.MINEWIND.NET New Server IPUltoSMP 1.21.11 Join Before It Spreads
I found UltoSMP and it is running on 1.21.11 for Java and Bedrock.
It feels like a server where you should join early and gear up fast. The post makes it sound like something is going to start spreading so getting ready before that happens is the whole vibe.GG.MINEWIND.NET New Server IP