Object Storage

Google Cloud Storage is Google Cloud's managed object store, offering five storage classes from Rapid to Archive and an Autoclass mode that moves objects between them automatically as access patterns change.

Azure Blob Storage is Microsoft's managed object store, and the service Azure Data Lake Storage is built on — enabling its hierarchical namespace turns a blob container into a POSIX-like filesystem that Spark and Presto read through the ABFS driver.

Cloudflare R2 is a managed object store with an S3-compatible API and no charge for data transfer out at any volume, plus a built-in managed Apache Iceberg catalog currently in public beta.

Ceph is an open-source distributed storage platform providing object, block, and file interfaces from a single cluster built on commodity hardware, with its RADOS Gateway exposing the S3-compatible API.

Apache Ozone is an open-source object store built for analytics workloads, serving the same data through a native S3 protocol and a Hadoop-compatible filesystem interface, and scaling to billions of objects.

SeaweedFS is an open-source distributed store built on Facebook's Haystack design, keeping per-file metadata overhead to about 40 bytes so it can serve billions of small files with a single disk seek.

Garage is an open-source S3-compatible object store that ships as one dependency-free binary, runs across geographically separate sites without a dedicated backbone, and needs as little as 1 GB of RAM per node.

Backblaze B2 is a managed S3-compatible object store priced well below the hyperscalers, with free monthly egress up to three times the stored volume and no minimum storage duration.

Wasabi is a managed S3-compatible object store billed at a flat rate per terabyte with no charges for egress or API operations, in exchange for a 90-day minimum storage duration.

Storj is an S3-compatible object store that erasure-codes each object across a global network of independently operated nodes, rather than storing it in a provider's own datacenters.

Amazon S3 is AWS's managed object storage service — the de facto substrate for data lakes and lakehouses, with tiered storage classes and fine-grained access control.

MinIO is an open-source, S3 API-compatible object store for self-hosted, on-prem, and edge deployments, built for high-performance analytical workloads.