About Data Island
Building sovereign data infrastructure for the next generation of enterprises.
Our Mission
We believe organizations should own their data infrastructure completely, without compromise, without vendor lock-in, and without surveillance.
Data Sovereignty
Your data stays on your infrastructure. No phone-home, no telemetry, no third-party access. Full control, always.
Source-Available Core
The SuperTable engine ships under FSL-1.1-ALv2 — source-available today, Apache 2.0 after two years. Inspect the code, contribute improvements, and build with confidence that there are no black boxes.
Compliance First
Built with GDPR, data residency, and audit trail requirements from day one, not bolted on as an afterthought.
Born in Budapest, Built for the World
Data Island is built by Kladna Soft, a software company based in Budapest, Hungary. We started with a simple observation: modern data platforms force organizations to choose between powerful features and true data ownership.
We decided to build a platform where you never have to make that choice. Data Island gives you a modern, SQL-first lakehouse with enterprise-grade access control, time-travel queries, and BI connectivity, all running on your own infrastructure.
From local development on a laptop to multi-cloud production deployments, Data Island scales with you while your data never leaves your control.
Kladna Soft Kft.
Software Engineering Company
Budapest, Hungary
Data Infrastructure & Analytics
Sovereign, Open, Compliant
What We Believe
These principles guide every decision we make.
Self-Hosted First
Cloud should be an option, not a requirement. Every feature works on a single machine, a private data center, or a public cloud. You choose where your data lives.
No Telemetry
Data Island does not phone home. No usage tracking, no analytics beacons, no anonymous metrics. Your usage patterns are your business, not ours.
Community Driven
Our source-available engine (FSL-1.1-ALv2, converts to Apache 2.0 after two years) lets the community audit, extend, and contribute. We build in the open and prioritize features based on real-world feedback.
Enterprise Ready
RBAC, audit logs, SSO integration, and compliance reporting are not afterthoughts. They are built into the platform from the ground up for regulated industries.