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SeaweedFS: the best Open Source alternative to Amazon S3 in 2026

SeaweedFS is a distributed file system optimized to serve billions of small files quickly, with an included S3 compatibility layer.

License Apache-2.0 ~23k stars (estimated)Website GitHub Repository

Technical profile

License: Apache-2.0
Category: Storage
Replaces: Amazon S3
Tech stack: Go

Preview

Public image provided by SeaweedFS on its own website.

Key features

Optimized for small files at scale
Included S3 compatibility layer
Configurable replication and erasure coding

SeaweedFS vs. Amazon S3

Pros

Excellent performance with massive volumes of small files

Things to consider

Less polished documentation than MinIO to get started

Quick Docker installation guide

Copy this docker-compose.yml, adjust the example passwords and run docker compose up -d on your server. See the full step-by-step guide →

docker-compose.yml

version: "3.9"
services:
  seaweedfs:
    image: chrislusf/seaweedfs:latest
    restart: unless-stopped
    ports:
      - "9333:9333"
      - "8888:8888"
      - "8333:8333"
    command: server -s3
    volumes:
      - seaweedfs_data:/data
volumes:
  seaweedfs_data: