Cloud Storage

S3 Compatible

best big data object storage S3 API compatibility

Achieve Sovereign Big Data Storage with Full S3 API Compatibility

29.08.2025

10

Minutes

Thomas Demoor

CTO Impossible Cloud

Oct 11, 2025

29.08.2025

29.08.2025

10

Minutes

Thomas Demoor

CTO Impossible Cloud

Enterprises managing big data face a triple threat: unpredictable costs, regulatory risks, and vendor lock-in. A new class of object storage offers a solution built on digital sovereignty and 100% S3 compatibility. This approach eliminates egress fees and ensures your data stays under EU control.

Key Takeaways

Full S3 API compatibility protects existing investments in tools and applications, eliminating the need for code rewrites during migration.

Storing data in EU-only data centers with geofencing ensures digital sovereignty, GDPR compliance, and avoidance of CLOUD Act exposure.

A transparent pricing model with zero egress fees, no API call costs, and no minimum storage duration provides predictable economics for big data workloads.

Selecting the best big data object storage requires more than just capacity; it demands robust S3 API compatibility to protect your investments in existing tools and workflows. Many EU decision-makers now prioritize European solutions to ensure GDPR compliance and avoid CLOUD Act exposure. True enterprise-readiness combines this sovereignty with a transparent economic model, eliminating the surprise egress and API call fees that inflate budgets by over 40% for many firms. An effective strategy hinges on a platform that delivers performance parity, data security, and cost transparency, making an EU-based alternative a practical, low-risk choice for modern IT leaders.

Loading form...

Establish Full S3 Compatibility Beyond Basic Operations

True S3 API compatibility is the foundation of modern big data infrastructure, protecting years of investment in applications and scripts. Enterprise-grade solutions must support 100% of standard object operations and advanced capabilities like versioning, lifecycle management, and event notifications. This ensures your data pipelines continue running without any code rewrites, minimizing migration risk to nearly zero. A fully compatible API allows your existing backup tools and SDKs to work out-of-the-box. For a deeper look at our API, review our S3 compatibility documentation. This level of integration is the first step toward building a flexible and future-proof data strategy.

Implement an Architecture Built for Predictable Performance

An effective big data strategy requires an architecture designed for consistency, availability, and scale. Many legacy systems rely on fragile tiering models that create delays and API timeouts during urgent restores, increasing operational costs by up to 30%. In contrast, an “Always-Hot” object storage model ensures all data is immediately accessible without tier-restore delays. This simplifies operations and keeps third-party tools stable under any workload. This modern architecture delivers key advantages: Strong read/write consistency for data integrity across millions of files; Predictable latencies suitable for hybrid analytic and archival patterns; Multi-AZ replication that eliminates single points of failure; Reduced operational complexity with zero restore surprises. This approach provides the resilience needed for the best object storage for large data amounts. It ensures your infrastructure remains robust as data volumes grow by over 50% annually for most enterprises.

Secure Digital Sovereignty with EU-Only Data Centers

For UK and European enterprises, data sovereignty is a primary concern, with over 75% of IT leaders demanding EU-based solutions. Storing data exclusively in certified European data centers ensures full GDPR compliance and avoids exposure to foreign laws like the CLOUD Act. Country-level geofencing provides another layer of control, keeping sensitive workloads within predefined regions under strict EU rules. This EU-centric governance model provides the legal certainty required for regulated industries. Upcoming regulations further underscore the need for a sovereign-by-design approach. Two key regulations are shaping the landscape: EU Data Act (from September 2025): This mandates data portability and interoperability by design, ensuring you have a real exit path with no lock-in. NIS-2 Directive: This requires continuous security processes, supply-chain assurance, and strict incident reporting timelines, which must be baked into provider operations. Choosing one of the leading AWS S3 alternatives in the UK helps future-proof your compliance posture. This focus on regulatory readiness transforms compliance from a burden into a competitive advantage.

Activate Advanced Ransomware Protection with Immutable Storage

Ransomware remains a top threat, with attacks increasing by over 90% in the last two years. The best defense for big data archives is immutable storage with S3 Object Lock. This feature makes data unchangeable and undeletable for a specified period, creating a tamper-proof copy for recovery. It is a core component of modern backup and disaster recovery strategies, providing an audit-ready retention mechanism. Immutable backups render ransomware attacks ineffective by guaranteeing a clean recovery point. You can compare S3-compatible solutions to see how this feature is implemented. Integrating this technology is a critical step in building a resilient data protection plan.

Achieve Predictable Economics and Eliminate Hidden Fees

A significant pain point for over 60% of cloud customers is unpredictable billing, driven by hidden egress and API call fees. A transparent economic model with zero egress fees, no API call costs, and no minimum storage durations is essential for managing big data budgets. This predictability is especially valuable for MSPs and resellers, as it allows them to build services with stable, defensible margins. The EU Data Act will phase out profit-generating egress fees by 2027, making transparent pricing a regulatory expectation. This model removes the financial penalties for accessing your own data. Finding a solution that is cheaper than AWS S3 in the UK without sacrificing performance is now a practical reality. This financial clarity allows for better business planning and removes the risk of vendor lock-in.

Leverage a Partner-Ready Platform for Channel Growth

For MSPs, resellers, and system integrators, a partner-ready platform is a powerful growth engine. Key features should include multi-tenant management, robust automation via API/CLI, and detailed reporting through a central partner console. Fast onboarding and dedicated support enable partners to deploy solutions for backup, archiving, and disaster recovery in under 24 hours. Predictable margins, guaranteed by the zero-egress-fee model, are a core value proposition for the channel. Recent distribution milestones, like partnerships with api in Germany and Northamber plc in the UK, expand local access for hundreds of resellers. This ecosystem focus helps partners build a resilient enterprise data lake in the UK for their clients. A strong partner program simplifies compliance and accelerates time-to-market.

Build a Resilient Data Strategy with an Exit Plan

Long-term data strategy requires preserving freedom of action, a principle now enforced by the EU Data Act from September 2025. An exit strategy should be built on open standards, exportable formats, and proven bulk data movement capabilities. Full S3 API compatibility is the first pillar, ensuring your tools remain functional across platforms. The second is a commercial model free of punitive egress fees, which removes financial barriers to switching. This combination of technical and commercial freedom preserves your negotiation power. Whether you are managing block vs. object storage, portability is key. Talk to an expert today to design a sovereign, cost-predictable storage solution for your big data needs.

Long-term data strategy requires preserving freedom of action, a principle now enforced by the EU Data Act from September 2025. An exit strategy should be built on open standards, exportable formats, and proven bulk data movement capabilities. Full S3 API compatibility is the first pillar, ensuring your tools remain functional across platforms. The second is a commercial model free of punitive egress fees, which removes financial barriers to switching. This combination of technical and commercial freedom preserves your negotiation power. Whether you are managing block vs. object storage, portability is key. Talk to an expert today to design a sovereign, cost-predictable storage solution for your big data needs.

FAQ

What makes an object storage solution 'enterprise-ready'?

An enterprise-ready object storage solution provides more than just storage. It includes full S3 API compatibility, an 'Always-Hot' architecture for consistent performance, robust IAM with MFA/RBAC, immutable storage for ransomware protection, and a transparent pricing model with no hidden fees. It must also meet strict regulatory standards like GDPR and NIS-2.



How does Impossible Cloud ensure GDPR compliance?

Impossible Cloud ensures GDPR compliance by operating exclusively in certified European data centers. We offer country-level geofencing to keep data within specific EU regions, and our governance model is designed to provide full digital sovereignty, protecting data from foreign legal jurisdictions.



Is it difficult to migrate from another S3-compatible provider?

No, migration is straightforward. Our full S3-API compatibility means your existing applications, scripts, and tools will work without any changes. Combined with our policy of no egress fees and no minimum storage durations, the technical and financial barriers to switching are removed.



What is 'Always-Hot' object storage?

The 'Always-Hot' storage model means all your data is immediately accessible at high performance, without the delays or restore fees associated with tiered storage (e.g., hot, cool, archive tiers). This simplifies operations, makes costs predictable, and ensures your data is always ready for urgent restores or analytics workloads.



How does Object Lock protect against ransomware?

Object Lock, also known as immutable storage, allows you to make data objects unchangeable and undeletable for a specified retention period. If a ransomware attack occurs, you can restore your systems from these tamper-proof copies, ensuring business continuity with a guaranteed clean recovery point.



What benefits does Impossible Cloud offer to MSPs and channel partners?

We offer a partner-ready platform with predictable margins thanks to our zero-egress-fee model. Partners get access to a multi-tenant management console with RBAC and MFA, automation via API/CLI, detailed reporting, and fast onboarding. Our growing distributor network, including Northamber plc in the UK, provides local support.



Find more articles

Find more articles

Find more articles

Contact Us

I agree to be contacted in accordance with the Privacy Policy.

Contact Us

I agree to be contacted in accordance with the Privacy Policy.

Contact Us

I agree to be contacted in accordance with the Privacy Policy.

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.