S3-Compatible Object Storage: MinIO Alternatives and Self-Hosted Storage Options

For years, the answer to “we need our own S3-compatible storage” was one word: MinIO. It was easy to install, widely documented, and it just worked. Then the ground moved. If you are running it today, or were about to start a new project with it, the question has changed from “how do I install it?” to “what should I trust for the next five years?”

This guide walks through the current landscape of self-hosted object storage: what happened to MinIO, which alternatives are worth a serious look, how to choose between them, and how to move data without losing sleep.

What happened to MinIO, briefly

Over 2025 and early 2026, the MinIO community project gradually lost parts of its management interface, stopped shipping prebuilt binaries, entered maintenance mode, and was finally archived as a read-only repository in April 2026. The company’s commercial product continues, and the community source is still available under its open-source license.

The practical meaning is simple. Existing installations keep working, so there is no emergency. But the community edition no longer receives upstream fixes or security updates, and that is a poor foundation for storage that holds important data. Treat this as a planning deadline, not a panic button.

First, what “S3-compatible” really means

S3-compatible storage means a system that speaks the same S3 API that Amazon popularized, so your existing SDKs, tools and applications can talk to it by changing an endpoint. The catch is that “compatible” is a spectrum. Uploading and downloading objects works almost everywhere. Advanced features such as versioning, Object Lock, bucket policies, lifecycle rules and event notifications vary a lot between projects.

That is why the most important step in any evaluation is writing down which S3 features your applications genuinely need.

The alternatives worth knowing

Option	License	Best for	Watch out for
Garage	AGPLv3	Small and mid-size clusters, even spread across several sites	Lighter S3 subset. No versioning, Object Lock or standard bucket policies.
SeaweedFS	Apache 2.0	Large numbers of small files, flexible storage layouts	More moving parts. Check feature coverage against your needs.
Ceph RGW	LGPL	Large clusters needing mature S3 behavior, plus block and file storage	Real operational complexity. Wants several servers and someone who owns it.
RustFS	Apache 2.0	Teams wanting a MinIO-style experience	Newer project. Pilot it and verify maturity before betting production data.

Features and project status change quickly in this space, so confirm details in each project’s current documentation before you commit.

Garage: small, calm and distributed

Garage was built for modest clusters, including nodes in different physical locations connected by ordinary internet links. It ships as a single binary, replicates data across zones, and uses few resources. Its developers are open about trade-offs: it prioritizes simplicity and resilience over raw speed, and it deliberately omits some S3 features. For uploads, media, static assets and many backup workflows, that subset is plenty.

SeaweedFS: flexible and good with small files

SeaweedFS separates volume servers from a metadata layer, which makes it strong for workloads with huge numbers of small objects. It has a long development history and a permissive license. The flexibility comes with more components to understand.

Ceph RGW: the heavyweight

If you need mature, broad S3 behavior at serious scale, Ceph’s object gateway is the established answer. It also provides block and file storage from the same cluster. The honest warning: running Ceph just to obtain an S3 endpoint on one or two servers is overkill. It earns its keep once you have multiple nodes and the staff to operate it.

RustFS: promising, but verify

RustFS aims for a MinIO-like experience under a permissive license. It is newer, so run it in a pilot with copies of your data, keep your existing system and backups until it has proven itself in your environment, and re-check its maturity before production.

How to choose without agonizing

1. List your required S3 features. If you rely on versioning or Object Lock, eliminate options that lack them. Object Lock matters especially for immutable backups against ransomware.
2. Be honest about team capacity. A small team with little spare time should lean toward the simpler systems.
3. Check licensing. AGPLv3 is fine for many internal uses, but legal teams sometimes prefer Apache 2.0 when embedding or redistributing.
4. Estimate data size and growth. A few terabytes on one or two servers is a different problem from hundreds of terabytes.
5. Decide how data should survive failures. Replication across nodes is simple but uses more raw capacity. Erasure coding saves space but adds complexity.
6. Test with your real clients. Run your actual SDKs, backup tools and multipart uploads, then kill a node and watch recovery.

Sizing a private object storage server

Private object storage is mostly a capacity and network question, with a little cleverness on the side:

• Disks: large HDDs give cheap capacity for bulk data. Add NVMe for metadata or hot data where the software supports it.
• Memory and CPU: modest for plain storage, more if you add compression, encryption or heavy listing workloads.
• Network: object storage moves a lot of data. Generous bandwidth and low latency between nodes pay off.
• Failure domains: spread replicas across separate servers, racks or even data centers, never three disks in one box.
• Headroom: do not run pools nearly full. Rebuilds and rebalancing need free space.

Because storage is steady and capacity-driven, flat-rate dedicated servers make costs easy to predict, which pairs nicely with the habits in our FinOps guide to controlling infrastructure costs. BeStarHost offers dedicated servers across locations including Germany, the Netherlands and the United States, and our unmanaged servers give you the control a storage cluster needs. Tell us what you are planning and we can discuss suitable configurations.

Migrating off MinIO safely

1. Inventory. List buckets, object counts, total size, access keys, policies and which applications touch each bucket.
2. Stand up the target and give it the same bucket names and permissions model your apps expect.
3. Copy the data with rclone in a first bulk pass, then repeat to catch changes.
4. Verify. Compare counts and checksums with rclone check rather than trusting a progress bar.
5. Cut over gradually. Move one low-risk application first, watch errors, then continue.
6. Keep the old system read-only for a while as a rollback path, and retire it only after a clean stretch.

Security and protection basics

• Use TLS everywhere and give every application its own keys with least-privilege access.
• Keep admin and cluster ports on a private network. Put a reverse proxy in front of the public S3 endpoint, and see our comparison of Nginx, Caddy and Traefik if you need help choosing.
• Encrypt sensitive data, either on the client or on the disks.
• Remember that replication is not backup. A deleted object or a stolen key can be replicated everywhere with great efficiency, so keep a separate, access-isolated copy.
• Monitor capacity, error rates and rebuild activity. The approach in our OpenTelemetry hosting guide applies to storage clients too.

Common mistakes

• Choosing by benchmark charts instead of testing your own workload.
• Assuming every S3-compatible system supports every S3 feature.
• Running a storage cluster on three disks in one chassis and calling it redundant.
• Skipping verification during migration.
• Leaving the old MinIO instance exposed and unpatched after the move.
• Treating replication as a substitute for backups.

Frequently asked questions

Is MinIO safe to keep running?

Existing installs continue to work, but the community edition no longer gets upstream fixes. Plan a migration, and until then isolate it from the internet and keep good backups.

What is the easiest MinIO alternative?

For small teams, lightweight options like Garage or SeaweedFS are usually simplest to run. The best choice depends on which S3 features you need.

Can I use S3-compatible storage for backups?

Yes, and it is a popular use. Check that your chosen system supports the features your backup tool expects, especially Object Lock if you want immutability.

Final thoughts

The good news about the MinIO shake-up is that the ecosystem is healthier for it. There are several capable, actively developed choices, each with a different personality. Be clear about the S3 features you truly need, pilot with your real tools, verify every migration step, and keep a separate backup. Do that, and your object storage server becomes something you can trust again instead of something you worry about.