DeeDee Linux

A secure foundation for applications critical to society

A dual-use product with defence-level security out of the box. DeeDee Linux provides a hardened Debian operating system for software critical to society. Run it on physical or virtual servers, at the edge, or as a container base image -on the infrastructure of your choice.

Build your DeeDee Application Platform on top of DeeDee Linux by adding the DeeDee Approved and DeeDee Integrated components your application needs. Choose identity management, databases, web services, security tools and other building blocks to create the platform you need.

Use DeeDee Linux on its own or expand into a broader application platform. Each Integrated component lets you reuse more configuration, integration and documentation work, giving your team more capacity to develop and operate the applications your customers depend on.

Security documentation for DeeDee Linux and its Integrated components supports your system's security reviews, verification, certification and accreditation work.

Discuss your use case Explore DeeDee

Focus on the application. Reuse the foundation.

Identity, databases, web services and security monitoring are essential to your application, but putting it all together and keeping it secure, integrated and updated over time is not.

Visar maintains the DeeDee Application Platform, with defined responsibilities for hardening, integration, updates, documentation, and support so that you can focus your attention on creating value for your end user on the application layer of the tech stack.

Deny by default.
Allow by choice.

Enable the services, connections and permissions your application needs. Everything else stays disabled by default. DeeDee brings a deliberate security design to the foundation beneath your application.

A maintained platform for your work

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IT service providers and MSPs

Add DeeDee to existing operations contracts.

Raise the security bar of the IT environments you have operational responsibility over while Visar supplies continuous product updates and third-line product support.

For service providers

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Defence and dual use

Move from prototype to production with a hardened foundation and reusable security evidence for demanding customer reviews.

Build operational capability and spend your time where it matters by choosing a platform that can stay with you through accreditation and battlefield alike.

For defence and dual use

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Development and operations

Focus your time and effort on application features and users.

Reuse maintained platform services across development, testing and production.

For application teams

Your infrastructure. Clear responsibilities.

Use DeeDee on physical or virtual servers, at the edge, embedded or as a container base image. Deploy in the cloud, on-premises or in air-gapped environments.

Visar Systems is a Swedish supplier with experience from defence, commercial software and open-source development. Public services and critical infrastructure are priority end markets, served directly or through IT service providers or MSPs.

Understand the work beneath your application

Explore practical guides to platform ownership, software inventory and security evidence in our knowledge hub.

Knowledge hub

Start small. Build big.

Tell us what you’re building, running or looking to improve.

Together, we’ll choose a first use case for DeeDee and define what a successful evaluation looks like.

Discuss your use case