MinIO vs SeaweedFS
Both are alternatives to Amazon S3. Here's how they stack up — verified facts, no spin.
Also searched as SeaweedFS vs MinIO — same comparison, one verdict.
MinIO
TOP PICKThe S3 API on your own hardware — same calls, no egress bill.
MinIO is a high-performance object server that speaks the S3 API closely enough that most applications need only a changed endpoint. Run it on a spare machine, a rack, or across a cluster; it handles erasure coding, versioning and encryption. AGPL-3.0, around 61k stars. For anyone whose objection to S3 is the egress bill rather than the storage price, this removes it entirely — the data is on hardware you already pay for. AGPL is the caveat: read it before you embed MinIO in a product you distribute.
SeaweedFS
Built for billions of small files, where most object stores struggle.
SeaweedFS is a distributed file and object store designed around a specific weakness in the others: enormous numbers of small files. Its architecture keeps metadata lookups fast where conventional object stores slow down, which makes it a strong fit for image, thumbnail and document workloads at scale. Apache-2.0, around 34k stars, with an S3-compatible gateway and tiered storage to cloud back-ends. It is less known than MinIO and that is the main caution — fewer worked examples when something goes wrong.
Side by side
| MinIO | SeaweedFS | |
|---|---|---|
| Sovereignty Score | 92 | 93 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | AGPL-3.0 | Apache-2.0 |
| Pricing | Free and open source. Commercial licence and support available from MinIO Inc. | Free and open source. You supply the hardware. |
MinIO is Macrostack's recommended Amazon S3 alternative, so it's our pick here.
MinIO
Strengths
- +S3-compatible API — most applications need one endpoint changed
- +No egress charges at all, because the data never leaves your network
- +Genuinely fast; used for high-throughput analytics workloads
- +Erasure coding, versioning and encryption built in
Trade-offs
- −AGPL-3.0 needs reading if you distribute a product containing it
- −You own durability now — replication and backups are your design
- −No Glacier equivalent for cheap cold archive
- −Recent licensing and feature changes have unsettled some users
SeaweedFS
Strengths
- +Handles billions of small files where other object stores degrade
- +Apache-2.0 — more permissive than MinIO's AGPL
- +S3-compatible gateway plus a real filesystem interface
- +Tiered storage to cloud back-ends for cold data
Trade-offs
- −Smaller community and fewer worked examples than MinIO
- −More moving parts — master, volume and filer servers
- −Documentation is thinner
- −Less battle-tested at enterprise scale
Related alternative guides
Facts verified 2026-08-04. Licenses and pricing change — spotted something out of date? That's a correction we want.