Which open-source object storage fits your team
A team that needs S3-compatible storage inside its own infrastructure should shortlist Ceph, MinIO and SeaweedFS, but the choice turns on maintenance status, scale and operating capacity more than on feature lists. The MinIO community repository is archived and source-only, with no further pre-compiled binaries, so MinIO is the option that needs the most justification before it reaches a shortlist. Ceph suits a larger cluster that also needs block (RBD) and file (CephFS) storage on the same RADOS foundation. SeaweedFS suits a smaller team that wants a simpler metadata and volume model and can accept a younger operating profile.
For Ceph, the verdict is conditional on having the capacity to run it. The project's actively maintained releases are Tentacle and Squid, and Squid's estimated end of life is October 31, 2026, so confirm the upgrade path before you deploy. Ceph's hardware recommendations call for a dedicated drive per OSD, enterprise-class SSDs for metadata and bonded network links across two switches, and they advise sizing memory for peak use. Ask your team whether it can absorb that hardware and operating load before choosing Ceph for object storage alone.
MinIO is only defensible where its archived status and AGPLv3 terms are acceptable to your legal and security reviewers. The README points to AIStor for commercial support and an SLA, and community support is best effort. SeaweedFS is Apache-2.0 with a paid Enterprise Edition, so confirm which features your requirements depend on before assuming the community build covers them. Whichever option you choose, test it against your own workload and scale, because the Ceph hardware guidance itself notes that no two clusters are alike.
Which object storage option fits which scenario
This table maps common object storage scenarios to the option that fits best and the condition that makes it fit. Read each row against your own footprint, Kubernetes plans and retention needs, because the right choice depends on what else the team must run and who will operate it.
| Scenario | Best fit | Why |
|---|---|---|
| One cluster for object, block and file storage | Ceph | Ceph provides object (RGW), block (RBD) and file (CephFS) storage on a single RADOS cluster. The fit holds only if the team can staff a multi-daemon cluster and follow the hardware recommendations for dedicated drives per OSD and bonded network links. |
| S3 storage only, with a small operating footprint | SeaweedFS | SeaweedFS exposes S3 through filer servers and stores blobs in append-only volume files with a 16-byte in-memory index per blob. It fits when a smaller component set matters more than block or file storage, and the team should confirm the memory and metadata store sizing for its object count. |
| Already running MinIO and deciding about the archived community repository | Evaluate AIStor or SeaweedFS against your data migration plan | The minio/minio README says the repository is no longer maintained, the community edition is source only, and legacy binaries will not receive updates. Choose AIStor if you want vendor-backed distribution and SLA support, or migrate to an alternative if AGPLv3 obligations or an unmaintained build are unacceptable; confirm both paths with the vendors. |
| Team running Kubernetes | Ceph with Rook, or SeaweedFS with its Helm charts, CSI driver and operator | Rook is the Kubernetes path the cephadm documentation points to, and the CNCF lists Rook as Graduated. SeaweedFS can be deployed on Kubernetes with Helm charts, a CSI driver and an operator. Choose by how much storage platform your Kubernetes team is ready to operate. |
| Apache Iceberg tables on object storage | SeaweedFS | SeaweedFS includes S3 Table Buckets for Apache Iceberg tables with an integrated REST catalog. This fit holds if you need the catalog built in; if you already run a separate catalog service, confirm its compatibility with your query engines. |
| Strict license and paid edition requirements | Ceph | Ceph's source is licensed under LGPL-2.1 or LGPL-3, with some bundled components under other licenses, and the project offers no paid edition. Confirm the bundled component licenses with legal before distribution, and plan for support from a commercial vendor or your own staff. |
| Security controls on the data path | Ceph | Ceph's messenger v2 offers a secure mode that encrypts post-authentication traffic with AES-GCM, and RGW supports Keystone and LDAP authentication, multi-factor authentication and Open Policy Agent integration. Confirm that these settings meet your encryption and identity requirements in your own configuration. |
How Ceph, MinIO and SeaweedFS differ in brief
Ceph, MinIO and SeaweedFS take three different routes to S3-compatible storage. Their licenses, support models and maintenance status differ enough that a deployment plan that works for one can fail for another, so read each card for the decision it forces.
Ceph: unified storage on one cluster
Ceph's source is licensed under LGPL-2.1 or LGPL-3.0, and the project itself sells no paid edition. Your cost is the hardware, the staff who run it and any support contract you buy from a third party. Its defining idea is one RADOS cluster that serves object (RGW), block (RBD) and file (CephFS) storage. Check that your release line fits your upgrade calendar, because Squid's estimated end of life is October 31, 2026. Confirm whether you need all three interfaces before you adopt the full cluster.
MinIO community: archived source only
The MinIO community server is licensed under AGPL v3.0, and its README says the repository is no longer maintained. The community edition is now distributed as source code only, with no further pre-compiled binaries, and legacy binaries will not receive updates. The last tagged community release is RELEASE.2025-10-15T17-29-55Z, published October 16, 2025, and the minio/minio, minio/operator and minio/mc repositories are archived. Its design is an S3-compatible object store that you build yourself, so treat the maintenance status as the first decision.
AIStor Free and Enterprise
AIStor is MinIO's commercial line, and the README names two products. AIStor Free is a standalone edition under a free license, and AIStor Enterprise is a distributed edition with commercial support. Neither is open source under the OSI definition, so do not assume the AGPLv3 community terms carry over to them. Confirm the terms of AIStor Free with the vendor before you rely on it, including what production use it permits and what support it includes. The README says SLA-backed support is available only through AIStor, so ask for that in writing.
SeaweedFS: Apache-2.0 with a paid tier
SeaweedFS is licensed under Apache-2.0 and has a paid Enterprise Edition that its README says adds data recovery and self-healing storage. Its defining idea is separate master, volume and filer roles: master servers track volume locations, volume servers store blobs in append-only volume files, and filer servers manage directories and files. Each blob carries a 16-byte in-memory index, so size memory for your blob count. Decide early whether your recovery requirements fall within the community edition or the paid tier.
Side-by-side capability and maintenance status
This table compares Ceph, MinIO and SeaweedFS on licensing, support, maintenance status, protocols, security controls and deployment path. Read the maintenance and release rows first, because MinIO's community repositories are archived while Ceph and SeaweedFS have current releases. Where a capability is not covered by the sources we reviewed, the cell tells you what to confirm with the project before you commit.
| Capability | Ceph | MinIO | SeaweedFS |
|---|---|---|---|
| License | LGPL-2.1 or LGPL-3.0 for most of the source, with some bundled components under other licenses | AGPL-3.0 for the community server | Apache-2.0 |
| Paid edition | No paid edition from the project itself; commercial support comes from third parties | AIStor Free and AIStor Enterprise, both from MinIO | Paid Enterprise Edition that adds data recovery and self-healing storage |
| Maintenance status | Actively maintained with periodic backports and security fixes on Tentacle and Squid | Repositories archived and read-only; README says the repository is no longer maintained | Actively developed; release 4.48 followed 4.47 on September 14, 2026 |
| Latest supplied release | Tentacle 20.2.4 (line first released November 18, 2025); Squid 19.2.7 | RELEASE.2025-10-15T17-29-55Z, the last tagged community release | Release 4.48, published September 28, 2026 |
| Estimated end of life | Tentacle: June 1, 2027. Squid: October 31, 2026 | Not applicable; no further community updates are planned in the sources reviewed | Confirm the support window for each release line with the SeaweedFS project |
| S3 API | Yes, through the Ceph Object Gateway (RGW) | Yes, S3-compatible object storage | Yes, through filer servers |
| Other protocols | Swift (RGW), block (RBD) and file (CephFS) on one RADOS cluster | Embedded web console and mc command-line client; confirm any other protocols with MinIO | HTTP, WebDAV, SFTP and FUSE through filer servers |
| Metadata store options | Managed within the Ceph cluster; confirm tuning options with the project | Confirm with MinIO; not covered in the sources reviewed | LevelDB, RocksDB, SQLite, MySQL, PostgreSQL, Cassandra, MongoDB, Redis, Elasticsearch, etcd, TiKV and FoundationDB |
| Erasure coding | Supported for object storage; confirm the profile for your pools | Supported, with erasure coding documentation in the README | Supported for warm data |
| Encryption at rest | Confirm the RGW and OSD options for your version with the Ceph project | Confirm with MinIO before relying on it | AES256-GCM encryption at rest |
| TLS or mTLS | Messenger v2 secure mode encrypts post-authentication traffic with AES-GCM and adds integrity checks | Confirm TLS configuration with MinIO for your deployment | TLS or mTLS supported |
| Kubernetes deployment path | Rook, which the CNCF lists as a Graduated project; cephadm points to Rook for Kubernetes | MinIO Operator, listed in the README (repository archived) | Helm charts, a CSI driver and an operator |
| Identity integration | RGW supports Keystone and LDAP authentication, multi-factor authentication and Open Policy Agent; Dashboard supports SAML 2.0 and OAuth2 under cephadm | Confirm supported identity providers with MinIO | Confirm identity options with the SeaweedFS project |
| Source of support | Community and third-party vendors; no project-run paid support tier | Best-effort community support through GitHub and Slack; SLA-backed support only through AIStor | Community and the Enterprise Edition vendor; confirm terms before purchase |
What MinIO's archived community edition means for your plan
The MinIO community repositories are archived and read-only, and the README says the community server is no longer maintained. The community edition is distributed as source code only, with no further pre-compiled binary releases, and legacy binaries will not receive updates. The last tagged community release on GitHub is RELEASE.2025-10-15T17-29-55Z, published October 16, 2025. Support for the AGPLv3 community software is best effort through GitHub and Slack, and SLA-backed support is offered only through AIStor. Before you commit, confirm with MinIO whether any security fixes will be published for the source tree, and where.
The AGPL v3.0 license is the second constraint. The community server is released under the GNU AGPL v3.0, and the README says any commercial or proprietary use must be validated against AGPLv3 obligations. The AGPL's network-use provisions can matter for software offered to users over a network, so the question is not only whether you modify MinIO but how your services expose it. The README directs commercial licensing to AIStor, which is listed as a standalone free-licensed edition (AIStor Free) and a distributed edition with commercial support (AIStor Enterprise). Ask your counsel whether your intended use triggers source disclosure, and ask MinIO what AIStor licensing covers in writing. These are questions for qualified advisers, not conclusions this page can give.
The decision follows from the answers. A team that keeps the community edition takes on patching, building and security review itself: pinning a Go 1.24 or later toolchain, rebuilding from source or the provided Dockerfile, tracking CVEs against the code it runs, and re-testing its own Kubernetes deployment on each change. A team that moves to AIStor, Ceph, SeaweedFS or another option faces a migration of buckets, access keys, policies and client configuration, plus a validation window for every application that talks S3. Put a dated plan in front of your platform and security leads, with the migration effort costed and a clear owner for source-level patching.
What each platform asks your team to operate
Ceph rewards teams that plan hardware carefully and can run a distributed storage cluster for years. Its own hardware recommendations shape most of the early work. The project advises a dedicated drive per OSD, moving WAL and DB onto shared SSDs for HDD-based OSDs, and using enterprise-class SSDs for metadata. Cephadm then runs the cluster as containers: it bootstraps a single-node cluster with one Monitor and one Manager, and you add hosts and services from there. Cephadm does not support releases older than v15.2.0.
- Drive layout: Plan one dedicated drive per OSD and place WAL and DB on shared SSDs when OSDs sit on spinning disks.
- Metadata media: Budget for enterprise-class SSDs for metadata, since these devices carry much of the cluster's latency profile.
- Network: Bond links across two switches so a single switch failure does not isolate hosts.
- Memory: Size RAM for peak use rather than quiet periods, and benchmark your own hardware before purchase because the guidance notes no two clusters are alike.
- Kubernetes path: If you run Kubernetes, the cephadm documentation points to Rook as the alternative deployment route.
Confirm with your Ceph administrators and hardware vendor that your planned release, currently Tentacle or Squid, matches your upgrade calendar before you commit to a layout. Your team needs storage engineering skills, network design, and experience with distributed systems troubleshooting.
MinIO's operating picture changed with its community repository. The minio/minio README states that the repository is no longer maintained, and the GitHub repositories for the server, operator and mc client are archived and read-only. The community edition is now distributed as source only, with no further pre-compiled binaries, and legacy binaries will not receive updates. Any deployment you build from this code is therefore your own build and patch responsibility. The project's build route is go install with Go 1.24 or later, or a Docker image built from the provided Dockerfile.
- Build chain: Maintain a Go toolchain at version 1.24 or later and a repeatable build pipeline that produces your own images.
- Container images: Build from the provided Dockerfile and own the rebuild cadence for base images and dependencies.
- Kubernetes: The README lists the MinIO Operator as the Kubernetes path, but the operator repository is archived, so confirm its status before you rely on it.
- Administration: The embedded web console and the mc command-line client are the documented admin tools.
- Support: Community support is best effort through GitHub and Slack, and SLA-backed support applies only to AIStor, so plan internal ownership for incidents.
Before you choose this route, ask MinIO or a licensed partner which AIStor edition, if any, fits your support requirements, and check the license obligations of the AGPLv3 code for your use. Your team needs Go build tooling, container image management, and the ability to own security patching without upstream releases.
SeaweedFS splits its work across three server roles, and your team must understand each one before sizing a deployment. Master servers track where volumes live, and the README notes you can run one master or a Raft group of three. Volume servers store blobs in append-only volume files and hold a 16-byte in-memory index per blob. Filer servers manage directories and files and expose the S3, HTTP, WebDAV, SFTP and FUSE interfaces. Filer metadata can live in many stores, including LevelDB, RocksDB, SQLite, MySQL, PostgreSQL, Cassandra, MongoDB, Redis, Elasticsearch, etcd, TiKV and FoundationDB, so the store choice is a real architecture decision.
- Master layout: Decide between a single master for simple setups and a three-node Raft group for resilience.
- Filer store: Pick a metadata store your database team already operates, such as PostgreSQL or MySQL, rather than a store nobody on staff knows.
- Deployment options: Deploy with Helm charts, the CSI driver and the operator on Kubernetes, or with Docker or on bare metal.
- Enterprise features: The paid Enterprise Edition adds data recovery and self-healing storage according to the README, so confirm which capabilities your operations depend on.
- Tiering: Erasure coding for warm data and rack- and data-center-aware replication need deliberate placement planning.
Confirm the filer store, Raft sizing and Enterprise Edition scope with SeaweedFS maintainers or a commercial partner before you finalize the design. Your team needs distributed systems operations, database administration for the chosen filer store, and Kubernetes skills if you deploy through Helm or the operator.
What drives the cost of running object storage yourself
The cost of self-hosted object storage is mostly people time and hardware, and the split between one-time and recurring work decides which platform costs more over its life. One-time work covers architecture and design, hardware selection, migration of existing buckets, and acceptance testing. Recurring work covers upgrades before end of life, patching, monitoring, capacity planning, backup verification and on-call coverage. With Ceph, the project itself is free under LGPL-2.1 or LGPL-3, so the spend goes to your staff, your hardware, and any partner you hire. The Ceph hardware recommendations ask for a dedicated drive per OSD, shared SSDs for WAL and DB on HDD-based OSDs, enterprise-class SSDs for metadata, and bonded links across two switches, and they say to benchmark before buying because no two clusters are alike. Ceph has no paid edition from the project itself, so support and any commercial agreement come from a third party, and you should confirm what that agreement covers.
Several factors push the recurring cost up. For Ceph, the release cadence is the main driver: Squid (v19) reaches estimated end of life on October 31, 2026 and Tentacle (v20) on June 1, 2027, according to the Ceph releases page, so each cluster needs a planned move to a supported release line on a schedule your change process can absorb. MinIO's community code is archived and its README says it is distributed as source only, with legacy binaries no longer receiving updates, so keeping that deployment patched is your responsibility, and moving to AIStor is a commercial decision you should price separately. SeaweedFS is Apache-2.0, but the README places data recovery and self-healing in the paid Enterprise Edition, which shifts recovery effort and cost depending on whether you buy it. Ask each vendor or partner which of these recovery functions they will run for you and what they expect your staff to do.
A written quote should make these items explicit: the exact release line covered and how end-of-life moves are handled; who performs upgrades and within what change window; who owns backups, restore testing and retention; who is on call and for which severity levels; what monitoring and capacity planning are included; and what hardware, licenses or Enterprise Edition subscriptions are excluded. Ask for the cost of a test restore and of a failed-node rebuild, since those events drive the real operating load. Confirm the support model in writing with the vendor, because for the archived MinIO community code, support is best effort through GitHub and Slack only.
How to choose and pilot an object store in four steps
This sequence turns a shortlist of Ceph, MinIO and SeaweedFS into a decision your team can defend, by checking support status first, then requirements, a measured pilot and a documented exit path.
Confirm maintenance status and support path
Start by checking each candidate's current release, its end-of-life date and who supports it. For Ceph, compare the active Tentacle and Squid lines against their estimated end-of-life dates on the Ceph releases page. For MinIO, confirm that the community repositories are archived and that the README directs users to AIStor for supported use, then check whether your legal team accepts AGPLv3 obligations for your use case. For SeaweedFS, confirm the Apache-2.0 license and which features sit only in the paid Enterprise Edition. The artifact is a one-page matrix listing license, latest release, end-of-life date, support provider and cost of support for each option. Reject any option whose community line has no maintained release path or whose support model does not cover your change window. Ask each vendor or provider for their written support terms before you rely on them.
Write the requirements and failure domain list
Your platform or storage lead writes a requirements document that states the expected capacity, object count and growth, the number of sites or racks that must survive a failure, and the S3 features your applications call, such as versioning, object lock or lifecycle rules. List the identity systems that must authenticate users and services, and the encryption and transport security your policy requires. Note any need for file or block access on the same cluster, since Ceph offers object, block and file storage on one RADOS cluster while MinIO and SeaweedFS focus on object access. The artifact is a signed requirements list. Reject any option that cannot meet a must-have requirement, or that needs a paid edition to meet it, unless the budget owner has accepted that cost in writing.
Build a pilot that measures operations
Deploy each shortlisted option on hardware or cloud accounts that match your production design, using the same network, drive types and identity setup. Throughput tests matter, but the pilot should also time the operating tasks your team will repeat: adding a node, replacing a failed drive, upgrading to a new release, restoring a bucket after a simulated loss and rotating credentials. For Ceph, follow the hardware recommendations on dedicated drives per OSD, shared SSDs for WAL and DB on HDD-based OSDs, and memory sized for peak use. Record every manual step and every error. The artifact is a pilot report with a runbook for each operating task. Reject an option when a routine task needs unsupported procedures, or when recovery steps are not documented well enough for your on-call staff to follow.
Decide the exit path before you commit
Before production use, document how data and object metadata would leave the chosen option if it stops being maintained or stops meeting your needs. Test an export of a representative bucket set into a neutral S3-compatible target and check that object names, versions, tags, lifecycle state and access policies survive the move. For SeaweedFS, note how the filer metadata store you choose affects migration, since it supports several backends. For MinIO, plan for the archived community code by keeping a tested copy of the build you run and a documented path to a successor. The artifact is an exit runbook with a tested migration sample and a named owner. Reject any option where metadata cannot be exported in a usable form or where the exit test takes longer than your data protection policy allows.
Questions teams ask before running S3 storage themselves
Can we still use the MinIO community edition if the repository is archived?
Yes, the AGPLv3 source code is still available, but the archived status means no further development or maintenance from the project's repository. The MinIO README says the community edition is distributed as source code only, with no more pre-compiled binary releases, and that legacy binaries will not receive updates. The last tagged community release is RELEASE.2025-10-15T17-29-55Z, published on October 16, 2025. Your team would own building, patching and security review of any version you run, and you must validate your use against AGPLv3 obligations. Confirm with MinIO which commercial path, AIStor Free or AIStor Enterprise, fits your licensing and support needs.
How much effort does running Ceph take, and why does hardware matter so much?
Running Ceph is a sustained operating commitment, not a one-time install. Cephadm manages the cluster as containers and bootstraps with one Monitor and one Manager before you add hosts and services, but day-two work covers upgrades, capacity planning and failure handling. Ceph's hardware recommendations call for a dedicated drive per OSD, shared SSDs for WAL and DB on HDD-based OSDs, enterprise-class SSDs for metadata, bonded network links across two switches, and memory sized for peak use. The same guidance says to benchmark before buying because no two clusters are alike. Ask any provider to show a hardware sizing worksheet tied to your workload before signing.
Can SeaweedFS run without its paid Enterprise Edition?
The core project is licensed under Apache-2.0, so the open-source build is usable without buying the Enterprise Edition. The README says the paid edition adds data recovery and self-healing storage, so you should plan how your team will handle those recovery tasks if you run the community build. Its architecture uses master servers, volume servers and filer servers, with metadata stores such as PostgreSQL or etcd selectable for the filer. Confirm with the SeaweedFS maintainers exactly which features are excluded from the community release and what support options exist for your environment.
How long does a pilot or migration take?
No duration is supplied for this comparison, and the scope drives the answer more than the product choice. The main variables are the amount of data to move, the number of applications calling the S3 API, the authentication model, the replication and erasure coding design, and whether you must keep the old store running during cutover. A pilot that tests one bucket, one application and one failure scenario is much shorter than a full migration with compliance evidence. Ask for a written timeline that lists the milestones, the acceptance tests and the dependencies on your team before agreeing to any schedule.
What does the work need from our own staff?
Your staff must own decisions that outside help cannot make for you, including data classification, access policy, retention rules and who approves changes in production. Engineers need working knowledge of Linux, networking, the S3 API and the chosen platform's upgrade model, and someone must be on call for storage incidents. For Ceph, that includes monitor quorum, OSD health and recovery behavior, while for SeaweedFS it includes master, volume and filer roles. Ask a provider which tasks they run, which they hand over during knowledge transfer, and which need named internal owners.
Can our team run this ourselves, and what does a fixed-scope engagement cover?
A capable team can run object storage itself, particularly for a small, well-understood workload, but the cost is staff time for installation, hardening, backups, upgrades and testing. DeployOpen plans, implements, integrates, hardens, backs up, upgrades, documents and supports self-hosted open-source platforms inside your own infrastructure. Most engagements are fixed-scope, with scope, deliverables and timelines agreed in writing before work starts, and ongoing support, upgrades and continuous testing are available as retainers. DeployOpen does not publish a price list, so a quote follows from the written scope. Request a scope document that names the platform, the environments, the handover tasks and the acceptance criteria.
How DeployOpen scopes an object storage selection and rollout
DeployOpen plans, implements, hardens, documents and supports self-hosted open-source platforms inside the client's own infrastructure, so an object storage decision is handled as a written, fixed-scope engagement. The work starts with the workloads, the existing S3 clients and the operating team, and only then moves to a platform choice and rollout.
How we scope
- Inventory the S3 clients, applications and backup jobs that must keep working after the move.
- Record the target sites, cloud accounts or air-gapped networks where the storage will run.
- Agree in writing which candidates are evaluated and what success looks like before any build begins.
How we build
- Deploy the chosen platform in the client's own environment, sized against a documented benchmark rather than assumptions.
- Configure access control, encryption and TLS or mTLS settings to the client's security baseline.
- Integrate identity, monitoring and backup tooling with the existing estate and test each integration.
How we hand over
- Deliver runbooks for upgrades, node replacement, capacity growth and recovery tests.
- Document the decisions made, the licensing position and any support path the client must buy separately.
- Walk the operating team through the handover and confirm who owns each runbook after go-live.
How we support
- Offer ongoing support, upgrades and continuous testing as a retainer after handover.
- Plan upgrades around the vendor's published maintenance windows and end-of-life dates for the chosen release.
- Review the platform's support status with the client at each planned upgrade cycle.
