Aternos free limits, and the point where free stops being the right answer
Aternos is genuinely free and supports both Java and Bedrock. Its official feature page also lists add-ons, DDoS protection, and Google Drive backups. For many groups it is the correct choice. This page explains the documented constraints so you can distinguish a minor wait from a server model that no longer fits the way your group plays.
Verified August 29, 2026 against the Aternos feature page, its 24/7 hosting explanation, and its maximum server-size documentation.
The four limits that actually matter
| Limit | What it means in practice |
|---|---|
| The server stops when empty | Aternos says its servers are not 24/7 and stop after the last player leaves. No game simulation runs while the process is stopped. |
| Starting can involve a queue | The first player or an authorized friend starts the server and may wait for shared capacity. Queue length varies, so do not plan around a fixed number of minutes. |
| Resources are shared and selected automatically | Aternos allocates resources for the selected software. It is suitable for many small worlds but does not let you buy a guaranteed larger RAM tier within the free service. |
| Server size is capped at 4 GB | The documented maximum includes the generated world and server files. Large explored worlds, modpacks, and plugins can reach it. |
There are ads too, which is a fair trade and not really a functional limit, so we will leave it there.
What free is genuinely good for
Being honest about this matters, because most "Aternos alternative" pages skip straight to selling you something.
- A group that plays together, at arranged times. If four of you get on voice chat and then start the server, the queue is a minor irritation, not a problem. You were all arriving at once anyway.
- Vanilla or a light extension set. The shared allocation can be enough for a modest world. Test the exact software, player count, and explored area rather than assuming a published RAM number.
- Bedrock add-ons. Aternos documents Bedrock add-on installation, making it a useful no-cost test path before paying for BDS.
- Trying an idea out. Testing whether your friends actually want to play a modpack before anyone pays for anything is exactly what a free tier is for.
- Short-lived worlds. If the world is not meant to outlive the month, storage and uptime never become an issue.
The four situations where it stops working
1. People play at different times
This is the big one, and it is a structural mismatch rather than an inconvenience. The moment your group spans time zones or schedules, "the server is only up when someone wakes it" means the second person to log on that day gets an empty world and a queue. Anything that depends on the world continuing while you are gone, which is most of the good parts of Minecraft, simply does not happen.
2. You are running a real modpack
A large modpack may exceed the automatically selected resources, the 4 GB server-size limit, or both. Our modpack sizing guide explains how to test RAM, CPU, generated-world size, and storage with the complete pack. JVM flags cannot compensate for a pack that does not fit, though Aikar's flags can still help a compatible Paper setup.
3. Anything that needs uptime to work
Redstone farms, mob farms, crop growth, villager mechanics, chunk loaders, scheduled backups, a Discord bridge that reports server events. All of it assumes the server is running. On a server that sleeps, these either do nothing or behave unpredictably, and you spend your session re-establishing state instead of playing.
4. You want people to just be able to join
If you are running anything semi-public, or even just a server your friends should be able to hop onto on a whim, "someone has to start it and everyone waits" is the end of casual play. People try once, see a queue, and do not come back.
What always-on actually costs
The honest number is smaller than most people expect, and it is worth knowing before you decide, because the decision often gets framed as free versus expensive when it is really free versus a few dollars.
A vanilla or light-plugin server for a handful of friends sits at the bottom of the market. A mid-size modpack is the middle. A 300-mod pack with a full group is the top. We break the whole range down, including how to work out which tier you actually need, on our Minecraft server cost page, and the short version is that RAM is what you are buying, so sizing it correctly is the entire decision.
The main thing an always-on plan removes is the start/queue dependency. It can also provide fixed resources, more storage, direct file access, and a support path, depending on the provider. Speed is not guaranteed merely because a service is paid.
How to decide, quickly
- Does everyone play at the same time? If yes, free is probably still fine. If no, that alone justifies moving.
- Does the complete pack or explored world approach the 4 GB server-size limit? If yes, plan a move before an update or backup needs more room.
- Does anything need to run while you are away? Farms, growth, automation. If yes, sleep mode is deleting the point of the world.
- Are you waking the server more than once a session? That is the tell that the queue has stopped being background noise.
If you answered no to all four, stay on the free tier. It is doing its job.
Related guides
- How much does a Minecraft server cost?
- Modpack server hardware sizing (ATM, Better MC, RLCraft)
- Aikar's flags: JVM tuning that actually helps
- Fixing server lag
- Installing Bedrock add-ons on BDS
- Minecraft hosting, Realms, Aternos, VPS, and self-hosting compared
Other paths
- Self-host: Mojang provides the Java and Bedrock server software without a hosting fee. Your PC, network, backups, firewall, and uptime become your responsibility.
- Realms: the official Bedrock subscription is $3.99/month for the owner plus two players, or $7.99/month for Realms Plus with the owner plus ten and Marketplace Pass.
- Managed hosting: compare normal monthly price, resources, backups, file access, software support, region, and the ability to export before choosing.
If you land on the "we need it always on" side of that list, Supercraft Minecraft hosting runs on AMD EPYC hardware with NVMe storage, no sleep and no start queue, automated backups, in-place plan upgrades so you can resize when a modpack grows, and a 2-day refund window. Live pricing for your region is on the plan page.