Cloud Storage

S3 Compatible

Impossible Cloud S3 API backup solutions

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IT professional securing backups with Sovereign S3 API storage solutions in a modern office.

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IT professional securing backups with Sovereign S3 API storage solutions in a modern office.

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IT professional securing backups with Sovereign S3 API storage solutions in a modern office.

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Secure Your Backups with Sovereign S3 API Storage Solutions

02.09.2025

9

Minutes

Thomas Demoor

CTO Impossible Cloud

02.09.2025

02.09.2025

9

Minutes

Thomas Demoor

CTO Impossible Cloud

Enterprises face a critical challenge: securing backup data while controlling costs and meeting strict EU data sovereignty laws. A truly sovereign S3-compatible solution offers a path to compliance and resilience without financial surprises.

Key Takeawys

Impossible Cloud offers a sovereign, S3-compatible backup solution with EU-only data centers to ensure GDPR compliance and avoid CLOUD Act exposure.

The platform features immutable Object Lock for ransomware protection and an 'Always-Hot' architecture for instant data recovery without complex tiering.

A transparent pricing model with zero egress fees, no API call costs, and no minimum storage duration provides predictable costs for backup and disaster recovery.

In 2025, European businesses require more than just storage; they need digital sovereignty. With over 84% of decision-makers viewing sovereignty as a critical factor, the reliance on non-EU providers presents significant compliance risks under GDPR and the CLOUD Act. Impossible Cloud provides enterprise-ready, S3-compatible object storage operated exclusively in European data centers. Our platform offers a practical path to secure your backups, ensure compliance, and eliminate unpredictable costs with a model that includes zero egress fees or API call charges. This is how you build a resilient, sovereign backup strategy.

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Establish Digital Sovereignty with EU-Centric Backup Storage

Data sovereignty is a board-level concern, with GDPR fines reaching up to 4% of a company's global revenue for non-compliance. Storing backup data with non-EU providers creates exposure to foreign laws, undermining the core tenets of European data protection. Impossible Cloud’s cloud backup solutions are sovereign by design, operating exclusively in certified European data centers to keep your data under EU jurisdiction. This architecture provides a direct solution to CLOUD Act concerns.

For industries like financial services, EU data residency is non-negotiable for maintaining customer trust and regulatory compliance. Our platform enforces country-level geofencing, ensuring your sensitive backup archives never leave predefined regions. This delivers the legal certainty 97% of EU businesses seek. This focus on localization provides a clear path to meeting stringent data handling requirements.

Leverage Full S3 Compatibility for Seamless Backup Integration

True S3 compatibility is essential for protecting technology investments. Our platform supports 100% of the S3 API, ensuring your existing backup tools, scripts, and applications work without modification. This compatibility allows developers to reduce application development time by up to 25%. You can seamlessly integrate with leading backup software from partners like Veeam and NovaBackup, maintaining your established workflows.

An enterprise-ready S3 API must support advanced features for modern backup strategies. Impossible Cloud provides robust support for:

  • Object versioning to protect against accidental deletions.

  • Lifecycle management policies to automate data retention.

  • Event notifications for streamlined workflow automation.

  • Multi-AZ replication for high availability and data integrity.

This comprehensive support ensures your backup and disaster recovery plans operate without compromise. This advanced feature set is key to building a truly resilient infrastructure.

Defend Against Ransomware with Immutable, Always-Hot Storage

With ransomware attacks expected to impact 75% of IT organizations by 2025, immutable backups are a critical last line of defense. Impossible Cloud’s Object Lock feature provides WORM (Write-Once-Read-Many) protection, making your backup data unchangeable and undeletable for its entire retention period. This capability is a core requirement for meeting NIS-2's stringent security mandates.

We simplify recovery with an “Always-Hot” architecture, where all data is immediately accessible without restore delays or fees. This model eliminates the operational complexity of tiered storage, which can cause API timeouts and hidden costs. Organizations using S3 for backup have reduced recovery times by up to 50%. This ensures you can meet your recovery time objectives (RTOs) reliably during a crisis, a crucial component of any disaster recovery plan.

Achieve Predictable Costs with a Zero-Fee Model

Unpredictable costs, especially egress fees, are a major barrier to effective cloud budget management. Impossible Cloud eliminates this problem entirely with a transparent pricing model that includes zero egress fees, zero API call costs, and no minimum storage durations. This predictability is especially valuable for backup and restore operations, which can involve moving petabytes of data.

This economic clarity empowers Managed Service Providers (MSPs) to build profitable Backup-as-a-Service (BaaS) offerings with defensible margins. Our partner-ready console includes multi-tenant management, RBAC, and automation tools. With distribution now available through api in Germany and Northamber plc in the UK, more partners can access our predictable storage model. This transparent approach directly addresses the market's need for cost control.

Future-Proof Your Strategy for the EU Data Act and NIS-2

The regulatory landscape in Europe continues to evolve. The EU Data Act, applicable from September 2025, mandates data portability to prevent vendor lock-in. Impossible Cloud is built on open standards, ensuring you can migrate your data, including all metadata and versions, at any time. This commitment to portability gives you long-term strategic freedom.

The NIS-2 Directive requires continuous security processes, including supply-chain assurance and documented incident reporting. Our platform helps you meet these obligations with:

  1. Multi-layer encryption for data in transit and at rest.

  2. Granular IAM with MFA and support for external IdPs via SAML/OIDC.

  3. Immutable storage to ensure data integrity for audits.

  4. Comprehensive logging and monitoring capabilities.

By aligning with these regulations by design, our S3 API object storage provides a competitive advantage. This readiness ensures your backup solution remains compliant for years to come.

Implement a Resilient, Sovereign Backup Solution Today

Transitioning to a sovereign cloud backup solution is a straightforward process. For a modern 4-2-2 backup strategy, you can use your existing S3-compatible tools to direct backup copies to our EU-only storage endpoints. Start with a single workload to test restore procedures and validate performance, which can reduce downtime by 80%. Our console provides a user-friendly interface for bucket creation, policy management, and monitoring without deep API expertise.

For MSPs and enterprises, our API and CLI enable full automation of your backup and archiving workflows. Partners like NovaBackup and Acronis offer out-of-the-box integrations that simplify onboarding to just a few steps. Ready to take control of your data? Talk to an expert to design a compliant and cost-effective backup architecture for your organization.

FAQ

Is Impossible Cloud compatible with my current backup software?

Yes. Impossible Cloud offers full S3 API compatibility, meaning it works out-of-the-box with leading backup and recovery software that supports S3-compatible object storage, including solutions from Veeam, Acronis, and NovaBackup.



Where is my data stored?

All data is stored exclusively in certified data centers within the European Union. We provide country-level geofencing to ensure your data remains in your specified region, helping you meet strict data residency and sovereignty requirements.



How does your pricing model work?

Our pricing is transparent and predictable. We charge for the storage you use without any egress fees, API request charges, or minimum storage duration penalties. This simplifies budgeting and eliminates the risk of unexpected bills.



Can I use Object Lock to protect my backups?

Absolutely. Our Immutable Storage feature, which uses S3 Object Lock, allows you to make your backup data unchangeable for a defined period. This is a core component of a modern ransomware defense and compliance strategy.



How do I migrate my existing backups to Impossible Cloud?

Thanks to our full S3 API compatibility, you can use any S3-compatible data migration tool or simply update the endpoint in your existing backup software configuration to point to our service. The process is designed to be seamless with no code changes required.



Do you offer support for Managed Service Providers (MSPs)?

Yes, our platform is partner-ready. We offer a multi-tenant console with role-based access control (RBAC), automation via API/CLI, and a predictable pricing model that allows MSPs to build profitable and defensible margins on their backup and archiving services.



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Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.

Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.

Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.