Open-source alternatives guide · Updated 2026
Compare the best free and open-source alternatives to Amazon S3 — 4 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.
Only explicit alternative relationships are shown—never inferred competitor claims.
This guide compares 4 verified open-source alternatives to Amazon S3, including Ceph, Garage, Storj, and SlateDB.
Projects appear across Infrastructure and Data & Analytics. 2 options include a self-hosting signal — see the self-hosted catalog. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.
Strongest repository-activity signal: Ceph · Jump to ranking · 16.8K stars
Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo
Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.
Ceph is a distributed object, block, and file storage platform
Ceph is a distributed object, block, and file storage platform Review the official repository, license, release activity, and deployment documentation before production adoption.
(Mirror) S3-compatible object store for small self-hosted geo-distributed deployments. Main repo: https://git.deuxfleurs.fr/Deuxfleurs/garage
(Mirror) S3-compatible object store for small self-hosted geo-distributed deployments. Main repo: https://git.deuxfleurs.fr/Deuxfleurs/garage Review the official repository, licens
Open-source alternative to Amazon S3
Ongoing Storj v3 development. Decentralized cloud object storage that is affordable, easy to use, private, and secure.
Ongoing Storj v3 development. Decentralized cloud object storage that is affordable, easy to use, private, and secure. Review the official repository, license, release activity, an
Open-source alternative to Amazon S3
A cloud native embedded storage engine built on object storage.
A cloud native embedded storage engine built on object storage. Review the official repository, license, release activity, and deployment documentation before production adoption.
Map must-have capabilitiesList the workflows in Amazon S3 you cannot drop during migration.
Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.
Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.
Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.
OpenSourceChoice currently lists 4 projects with an explicit alternative relationship to Amazon S3. Catalog highlights include Ceph, Garage, and Storj. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.
Most catalogued alternatives publish source under OSI or source-available licenses and are free to inspect. Hosting, commercial support, or cloud model APIs may still cost money. Always read the project license for your use case.
2 options in this list carry a self-hosting signal. Confirm the official install guide, backups, upgrades, and hardening steps before production.
Map must-have Amazon S3 workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.
Narrow the same alternatives by search, license, tags, or self-hosting signals when you need a tighter shortlist.
United StatesLicense not declaredCeph is a distributed object, block, and file storage platform
InfrastructureOpen-source projects grouped in this category for discovery and comparison.#
C++Projects tagged with this topic in the verified catalog.
Github ActionsProjects tagged with this topic in the verified catalog.
JavaScriptProjects tagged with this topic in the verified catalog.
Amazon S3Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…(Mirror) S3-compatible object store for small self-hosted geo-distributed deployments. Main repo: https://git.deuxfleurs.fr/Deuxfleurs/garage
Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.#
RustProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
CSSProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.Amazon S3Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…Ongoing Storj v3 development. Decentralized cloud object storage that is affordable, easy to use, private, and secure.
InfrastructureOpen-source projects grouped in this category for discovery and comparison.#
GoProjects tagged with this topic in the verified catalog.JavaScriptProjects tagged with this topic in the verified catalog.
NodeJSProjects tagged with this topic in the verified catalog.Self-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.Amazon S3Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…A cloud native embedded storage engine built on object storage.
Data & AnalyticsOpen-source projects grouped in this category for discovery and comparison.#RustProjects tagged with this topic in the verified catalog.Github ActionsProjects tagged with this topic in the verified catalog.
BashProjects tagged with this topic in the verified catalog.Amazon S3Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…
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