MinIO

Best for: teams who need S3-compatible object storage they run themselves — but see the maintenance warning below before adopting it.

MinIO is a high-performance, S3-compatible object store written in Go and released under AGPL v3. It implements the S3 API closely enough that most existing tooling and SDKs work unchanged, and it has been widely used for AI/ML pipelines, analytics and other data-intensive workloads where storing objects near compute matters.

What makes it useful: API compatibility means the code you write against MinIO also runs against Amazon S3, so you can develop locally and deploy to a cloud provider without rewriting your storage layer.

Where it falls short — read this first: the repository is explicitly marked as no longer maintained. The maintainers direct users to AIStor Free for a full-featured standalone community edition, or AIStor Enterprise for the distributed edition with commercial support. Treat this repository as archived: do not start new production deployments from it, and if you already run MinIO, plan a migration path. The AGPL v3 license also has real implications for commercial redistribution.

Details: Go, AGPL 3.0. Superseded by AIStor.