MinIO is an open-source object storage server compatible with the Amazon S3 API. It deploys as a single binary or distributed cluster with erasure coding, bucket versioning, and identity/policy management modeled on IAM.
Because it speaks the S3 API, the analytical ecosystem — table formats, query engines, ingestion tools — works against MinIO unchanged, which makes it the standard way to run lake storage outside a public cloud.
Typical usage contexts include on-prem and air-gapped platforms, edge deployments, and local development environments that mirror an S3-based production setup.