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Open-source alternatives to Amazon S3

Compare community-driven replacements for Amazon S3 in object storage & filesystems workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.

Amazon S3 logo

Amazon S3

Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalability, data availability, and durability for storing and retrieving any amount of data from anywhere on the web. It is used to store files (videos, images, backups, etc.) as objects in buckets, supports fine-grained access controls, and provides features like lifecycle policies and cross-region replication, making it a foundational storage solution for cloud applications and data lakes.Read more
Object Storage & Filesystems
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Key stats

  • 8Alternatives
  • 3Support self-hosting

    Run on infrastructure you control

  • 8Active development

    Recent commits in the last 6 months

  • 4Permissive licenses

    MIT, Apache, and similar licenses

Counts reflect projects currently indexed as alternatives to Amazon S3.

All open-source alternatives

Apache OpenDAL logo

Apache OpenDAL

Unified data access layer for any storage service

Active developmentPermissive licenseIntegration-friendlyRust

Why teams choose it

  • Unified API across 50+ storage services including S3, Azure Blob, GCS, HDFS, and local file systems
  • Native bindings for 15+ programming languages with consistent interfaces
  • Multiple access methods: CLI tools, POSIX filesystem mount, and API gateway

Watch for

Abstraction layer may introduce overhead compared to native SDKs

Migration highlight

Multi-Cloud Data Pipeline

Build ETL workflows that read from AWS S3, process data, and write to Azure Blob Storage using identical code patterns across environments.

Ceph logo

Ceph

Scalable distributed storage system for modern infrastructure

Active developmentIntegration-friendlyAI-powered workflowsC++

Why teams choose it

  • Unified storage: object, block, and file interfaces in one platform
  • Self-healing architecture with automatic data rebalancing and recovery
  • No single point of failure through distributed CRUSH placement algorithm

Watch for

Steep learning curve for operators new to distributed storage

Migration highlight

Kubernetes Persistent Storage

Dynamically provision RBD block volumes for stateful workloads with snapshot and clone capabilities

Garage logo

Garage

S3-compatible geo-distributed object storage for small-scale self-hosting

Self-host friendlyActive developmentPrivacy-firstRust

Why teams choose it

  • S3-compatible API for seamless integration with existing tools and applications
  • Geo-distributed architecture with automatic cross-location data replication
  • Lightweight Rust implementation optimized for resource-constrained environments

Watch for

Optimized for small-to-medium scale rather than massive enterprise deployments

Migration highlight

Multi-Site Personal Cloud

Replicate photos, documents, and backups across home, office, and remote locations with automatic failover when any site goes offline.

MinIO logo

MinIO

High-performance S3-compatible object storage for AI and analytics

Self-host friendlyActive developmentIntegration-friendlyGo

Why teams choose it

  • Full S3 API compatibility for drop-in replacement of Amazon S3
  • Optimized for AI/ML and analytics with high-throughput architecture
  • Multi-cloud and Kubernetes-native deployment support

Watch for

AGPLv3 license requires source disclosure for modified versions

Migration highlight

AI Model Training Pipeline

Store and serve petabytes of training data with low-latency access for distributed ML frameworks

RustFS logo

RustFS

High-performance Rust-based distributed object storage with S3 compatibility

Active developmentPermissive licenseFast to deployRust

Why teams choose it

  • High performance thanks to Rust’s zero‑cost abstractions
  • Distributed, fault‑tolerant architecture for scaling
  • Full S3 API compatibility

Watch for

Still in rapid development, not production‑ready

Migration highlight

Prototype AI training data lake

Store and retrieve large datasets via S3 API with low latency, enabling rapid model iteration.

Storj logo

Storj

Decentralized, S3-compatible storage that encrypts and distributes your data.

Active developmentPrivacy-firstIntegration-friendlyGo

Why teams choose it

  • End‑to‑end encryption with client‑side key management
  • Automatic sharding and distribution across a global network of nodes
  • S3‑compatible API for drop‑in replacement of existing workflows

Watch for

Performance can vary depending on node availability and network latency

Migration highlight

Secure backup for SaaS data

Encrypted backups are stored across multiple nodes, ensuring durability and compliance without managing infrastructure.

Supabase Storage Engine logo

Supabase Storage Engine

Scalable, lightweight object storage with PostgreSQL metadata and multi-protocol support

Active developmentPermissive licenseFast to deployTypeScript

Why teams choose it

  • Multi‑protocol API (HTTP/REST, TUS, S3, Iceberg) in a single service
  • Metadata stored in PostgreSQL with native row‑level security
  • Seamless integration with existing S3‑compatible storage backends

Watch for

Requires a PostgreSQL instance

Migration highlight

User avatar management

Store and retrieve user avatars with resumable uploads, enforcing per‑user access via PostgreSQL RLS.

SeaweedFS logo

SeaweedFS

Scalable distributed file system with fast O(1) object access

Self-host friendlyActive developmentPermissive licenseGo

Why teams choose it

  • O(1) single-disk reads with only 40 bytes metadata per file
  • Flexible replication and erasure-coding for cost-effective durability
  • Transparent tiered storage and cloud integration

Watch for

Operational complexity when configuring erasure coding and tiering

Migration highlight

Media asset management for streaming platform

Store billions of video files with instant O(1) retrieval, while automatically tiering older content to cheap cloud storage.

Choosing a object storage & filesystems alternative

Teams replacing Amazon S3 in object storage & filesystems workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.

  • 3 projects let you self-host and keep customer data on infrastructure you control.
  • 8 options are actively maintained with recent commits.

Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from Amazon S3.