Lightweight, S3-compatible object storage server
VaultS3 is a lightweight, self-hosted, S3-compatible object storage server delivered as a single static binary or container (<80MB idle RAM) with a built-in dashboard, erasure coding, clustering, encryption, and semantic/vector search.
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Quick Overview
Best for: Other
What it does
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Best fit
Other
Pricing snapshot
Free from AGPL-3.0 — free to self-host
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Lightweight, S3-compatible object storage server
VaultS3 is a self-hosted, S3-compatible object store designed to be lightweight and easy to run: a single binary or container that uses under 80 MB of idle RAM. It provides a full S3 API implementation (SigV4, multipart uploads, versioning, presigned URLs, object tagging, lifecycle, CORS, bucket policies) and is a drop-in for AWS SDKs, aws-cli, rclone, and boto3. The project includes a built-in web dashboard and production-oriented features such as erasure coding, Raft-based clustering, encryption (including per-bucket keys and SSE-C), tiering and backup, and built-in semantic/vector search for RAG workflows.
Self-hosted, S3-compatible object storage in a single binary under 80MB RAM. Built-in dashboard, erasure coding, Raft clustering, active-active replication, per-bucket encryption, and semantic / vector (RAG) search. The maintained, lightweight alternative to MinIO.
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Single binary, zero dependencies
Everything ships in one static binary (or small container) with no add-ons; advertised idle RAM under 80 MB.
S3 API compatibility
Supports S3-compatible API including SigV4 auth, multipart uploads, versioning, presigned URLs, object tagging, lifecycle, CORS, and bucket policies; drop-in for AWS SDKs, aws-cli, rclone, and boto3.
Built-in web dashboard
Management UI with file browser, bucket configuration, IAM, audit trail, metrics, search, and replication status — no separate licensed console required.
Server-side encryption
Server-side AES-256-GCM, per-bucket keys with rotation and crypto-shredding for tenant isolation, and SSE-C for operator-blind objects.
Erasure coding with healing
Reed–Solomon sharding across disks with a background healer that auto-reconstructs degraded objects to survive drive loss.
Raft clustering
Strongly-consistent metadata via HashiCorp Raft, consistent-hash placement ring, failure detection, and automatic failover.
Active-active replication (beta)
Bidirectional replication using vector clocks and pluggable conflict resolution, plus one-way async site-to-site push.
Semantic / vector search
Built-in vector search and RAG retrieval by embedding text via any OpenAI-compatible endpoint; no separate vector DB required.
Tiering & backup
Transparent hot/cold tiering to local or remote storage and scheduled full/incremental backups.
Multiple deployment options
Run as a static binary, container, Helm chart, Kubernetes operator, or FUSE mount; supports amd64 and arm64.
Pricing
AGPL-3.0 open source project; self-hosted and free to use under the license.
Open Source
AGPL-3.0 — free to self-host- Single binary container/Helm/operator deployments
- Built-in dashboard, encryption, erasure coding, clustering, replication, and vector search
Use Cases
Self-hosted S3-compatible object storage
Run a lightweight, fully-featured object store on-premises or in cloud VMs/containers as a drop-in alternative to AWS S3 or heavier self-hosted solutions.
Multi-tenant, encrypted storage
Provide per-bucket encryption with rotation and crypto-shredding and SSE-C for operator-blind objects to isolate tenant data.
Highly-available storage with fault tolerance
Use Reed–Solomon erasure coding and Raft metadata clustering to survive drive loss and ensure consistent metadata with automatic failover.
Cross-site replication and disaster recovery
Use active-active or one-way async replication and scheduled backups for multi-site replication and recovery workflows.
RAG/semantic retrieval
Embed and query text objects with built-in vector search (OpenAI-compatible embedding endpoints) for retrieval-augmented generation workflows without a separate vector DB.
Developer workflows and tool compatibility
Integrates with AWS SDKs, aws-cli, rclone, and boto3 for CI/CD, backup, and migration workflows.
Integrations
AWS SDKs / aws-cli / boto3
S3-compatible API allows drop-in usage with AWS SDKs and aws-cli tooling.
rclone
Compatible with rclone for data transfer and synchronization workflows.
OpenAI-compatible embedding endpoints
Use any OpenAI-compatible endpoint to embed text objects for the built-in vector search/RAG functionality.
Benefits
Limitations
Frequently Asked Questions
No verified FAQs are available.
Getting Started
- 1 Download the binary or container image from the project page or GitHub.
- 2 Run a container example: docker run -p 9000:9000 eniz1806/vaults3
- 3 Open the built-in web dashboard and consult the documentation (Read the docs) for configuration, IAM, and storage setup.
Support
docs
Documentation linked from the site (Read the docs).
source
Project source and releases on GitHub (link from the site).
container
Docker Hub image available for quick start (link from the site).
contact
Contact link provided on the project website.
API
Read the docs linked from the project site (S3-compatible API documentation available on the site).
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