MinIO
FreemiumS3-compatible object storage
About MinIO
MinIO is an S3-compatible object storage server written in Go, designed for high-throughput workloads. It runs as a single binary or in distributed mode across multiple nodes, and any app that speaks the S3 API can point at it with just a URL change. Around 50K GitHub stars. It covers erasure coding, encryption at rest, lifecycle policies, bucket versioning, and event notifications — the full S3 feature set. Performance benchmarks show it can saturate 25GbE networking on commodity hardware. The license changed from Apache 2.0 to AGPL v3 in 2021, which caused friction for commercial deployments — building a product on MinIO without open-sourcing your code requires a commercial license. There's no built-in CDN, so you'll need a reverse proxy or separate CDN layer for public asset serving. The web UI is functional but not polished. Reddit sysadmins commonly use it as a local S3 replacement for backups, Kubernetes persistent volumes, and ML training data. Single-binary deployment keeps operations simple.
Key Features
Pricing Plans
Community
- Full features
- AGPLv3 license
- Community support
Standard
- Per TB/month
- 24/7 support
- Subnet diagnostics
Enterprise
- Per TB/month
- Panic button
- Architecture review
Pros
- Full S3 compatibility
- Excellent performance
- Easy Kubernetes deployment
- Active open-source community
- Strong encryption
- Scales to exabytes
Cons
- Enterprise support expensive
- Learning curve for distributed setup
- Documentation could be better
- No built-in CDN
- Requires infrastructure knowledge
- AGPLv3 license restrictive for some
Best For
- S3-compatible storage for existing apps
- ML training data and artifact storage
- Backup targets for cloud-native tools
- High-throughput on-premises storage workloads
Not Ideal For
- Teams needing AGPL-free commercial embedding
- Use cases requiring built-in CDN or edge distribution
Potential Deal Breakers
- AGPL v3 license requires commercial license for embedded use
- No built-in CDN or edge distribution
- License change in 2021 surprised some existing commercial users
Data & Privacy
Open-source S3-compatible object storage. Self-hosted keeps all stored objects on your infrastructure. No telemetry. Enterprise features add monitoring but no data leaves your network. Full data sovereignty.
Who Is This For?
Hands-on tested May 2026
Signup Experience
Download the single Go binary or use Docker -- no account or signup required for self-hosted deployment. A basic single-node instance is running in under 5 minutes. The web console is accessible immediately. Distributed multi-node setup requires reading the erasure coding documentation before production deployment.
For Home Users
Free under AGPL v3 for personal and open-source use with no storage limits beyond available hardware. Home lab users running local S3 storage for backups, media, or self-hosted app data will find MinIO the most straightforward S3-compatible option available. Any tool that supports the S3 API works with MinIO without code changes.
For Business Users
Community edition is free under AGPL v3 -- commercial products embedding MinIO require a commercial license. Standard support at $10/TB/mo and Enterprise at $20/TB/mo add SLA and dedicated support. Internal infrastructure use is free regardless of company size under AGPL. The S3 API compatibility means existing AWS SDK code works without modification, reducing migration effort to a config change. ML and data engineering teams use MinIO as a local training data store that matches the S3 interface their pipelines already expect. Performance on fast hardware saturates 25GbE networking, making it viable for high-throughput AI workloads without cloud egress costs.
Our Verdict
MinIO is the obvious choice when you need S3 compatibility on-prem. The AGPL license matters for commercial products but not for internal infrastructure. Performance on fast hardware is impressive and S3 compatibility is thorough enough that AWS SDK examples just work.