Cellar Object Storage | Clever Cloud

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01 Amazon S3 Compatibility

Cellar Object Storage is compatible with the Amazon S3 API and SDK, which means you don’t need to change your tools, scripts, or workflows. You can use it with the tools you already know: AWS CLI, rclone, S3 libraries for major programming languages, and more.

You get the convenience of a familiar ecosystem to store your files easily on Clever Cloud.
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02 One-Click Provisionning

With Cellar, you get a fully operational object storage system on Clever Cloud in just one click. Configuration credentials are automatically exposed to your applications and services, making integration seamless.

Buckets can be created effortlessly from the dashboard or via the clever-tools command-line interface. Access credentials are provided as environment variables, ready to use in your apps. .Check out the documentation to understand how you can use the AWS S3 SDK to use Clever Cloud Cellar.
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03 High Availability

The Cellar S3 technology offers a distributed objects management. It means more concurrent requests and better availability of your assets on your apps.

So far, we can proudly display a 100% SLA. You can also host Cellar on your own infrastructure using Clever Cloud On-Premises.
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04 Large Capacities

Cellar is made for either small usage or big one.

You can store files from a few kilobytes to several terabytes. When uploading large files, connection issues may occur. To prevent this, Cellar integrates the multi-part upload: when initiating this process, you can upload objects parts independently and in any order. If the transmission fails, you can easily retry uploading these parts.
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05 Security

Cellar comes with powerful security features such as encryption of data in transit with TLS, ACL for Identity and Access Management, presigned URLs for uploading and downloading files with expiring signatures, server-side encryption of files via your private key, and so on.
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06 Privacy and sovereignty

Your data is stored in Europe, in datacenters that comply with personal data protection standards (GDPR) and shield you from extraterritorial regulations. With Clever Cloud, you retain full control over your data — no compromises.
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07 Pre-signed URLs

No more I/O management and accesses. You can use pre-signed URLs as paths of your assets in your templating. Ideal for profile photos for example. You can also upload with pre-signed URLs directly from your browser. It’s less code, less time, less debug.
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08 Collaboration

Clever Cloud Cellar enables you to manage access to buckets and objects: your bucket and files can get ACLs.

For each resource access, Cellar checks the right ACL to make sure that the requester is legitimate in terms of permissions.
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09 Versionning

Cellar is built with a file version management: You can use versioning to keep multiple versions of an object in one bucket.

This protects you from from unintended overwrites and deletions.
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10 Adaptive Price Scale

Our price grid is calculated on both outbound bandwidth and storage space. The more you need, the less you pay your terabyte of bandwidth or storage.

To eliminate vendor lock-in, Clever Cloud has removed egress fees in the event of a customer offboarding process. You’re free to leave — your data belongs to you, always.
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11 Free Plan

Even if our pricing is interesting for large players, we did not forget those who want to try our Cellar S3; a free plan is available for your first 100 MB of files. Just like the big Cellars, but smaller.
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12 Awesome Support

Any question? Our friendly support team is here to help you, usually responding within a few minutes, and closing tickets in 2 or 3 hours. You can access the support via chat or email, so feel free to reach out.

Understanding Object Storage

Unlike block storage or traditional file storage, object storage organizes data as objects. Each object contains the file itself, its metadata, and a unique identifier. Objects are grouped into “buckets.” This model is particularly well-suited for unstructured data (such as images, videos, backups, logs, datasets…) because it is:

Massively scalable,
Independent of operating system structure,
Accessible through a standard HTTP API.

Use Cases

Storing web assets (images, videos, scripts)
Automated application backups
Hosting documentation or static websites
Long-term archiving of non-critical data
Replacing Amazon S3 in contexts requiring sovereignty or cost control

Documentation

Learn how to use Cellar Object Storage and its API.

Cellar Documentation

Q&A

What is Cellar and how does it compare to S3 cloud storage?

Cellar is Clever Cloud’s object storage solution, fully compatible with the Amazon S3 API. It is a sovereign and scalable alternative to S3 cloud storage, allowing you to store and retrieve your objects just like with AWS S3 — without vendor dependencies.

Can I use Cellar as a direct replacement for Amazon S3?

Yes. Cellar is built as an S3-compatible alternative. You can keep using your existing tools and libraries: AWS CLI, SDKs for Python, Go, JavaScript, rclone, and more. No changes are needed in your scripts or applications.

Where is my data stored with Cellar?

All data is hosted in European datacenters that comply with GDPR and are protected from extraterritorial regulations such as the U.S. Cloud Act. Cellar is therefore an excellent choice for organizations seeking a European S3 alternative with full control over their data.

What are the typical use cases for Cellar object storage?

Cellar is ideal for storing unstructured data such as images, videos, backups, logs, or static websites. Whether you’re building a media platform, automating backups, or looking for an S3 alternative for long-term archiving, Cellar adapts to your needs