Mission‑ready AI. Proudly Canadian.
CastleGuard AI is the first runtime AI system built for defence operations.
Empower your next mission with AI that works for you — no coding, no lock‑in.
Just productivity from Day 1
The problem we set out to solve
AI platforms are everywhere, promising new models, niche apps and a lot of consulting services to adapt disjointed, proprietary tools for different environments.
Since we began developing AI tools for classified systems, we’ve had one consistent ask from defence teams: give us the freedom to run AI models on any OS and any infrastructure — from laptops to DGX servers — simply, securely and efficiently.
Any model, any mission
Back in the ‘90s, the Java Runtime Environment let developers “write once, run anywhere.” Now, the CastleGuard AI runtime system brings the same interoperability to AI — abstracting deployment and management so you can build secure, scalable AI apps for your mission, without vendor lock-in.
Experience the CastleGuard AI difference
The CastleGuard AI runtime system puts your mission first. Designed from the ground up for classified and sensitive workloads, supporting:
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Any model – LLMs, vision models, translation engines, and more.
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Any application – From operational intelligence to language translation.
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Any infrastructure – Classified networks, secure cloud, or completely off-grid.
CastleGuard gives you full control over your AI stack while simplifying the user experience and system management for your operational teams.
Accelerate your AI deployment
Our intuitive user interface includes four powerful AI enterprise apps for your team to use right out of the box. Get started on Day 1 with capabilities designed to simplify your workflow.
Expert GPT
Use any language model to extract insights and get instant access to a domain specialist. Blend multiple domain experts for the most accurate analysis and recommendations.
Translate
Rely on the only language model purpose-built for the Government of Canada and Canadian French for highly accurate sensitive translations, including domain-specific terms and acronyms.
Intelligence
Ingest and correlate structured and unstructured data from open sources, human reports, and signals intelligence into one cohesive knowledge base.
Transcription
Automatically convert audio to text in any language – even domain-specific language. Save hours and increase accuracy for important communications and classified meetings.
Our Commitment
At Nextria, we don’t just deliver technology – we partner in your mission. Our leadership includes seasoned AI experts with military experience, ensuring CastleGuard AI is grounded in real operational needs. We measure success in mission outcomes – lives saved, decisions improved, and operations secured.
ML Expertise Not Required
Our platform abstracts AI deployment, scaling, and complexity
Data Governance Controls
You keep full control of your data and can add your own governance rules
Secure & Soverign
Built in Canada.
Developed by Canadians.
Owned by Canadians.
Case Study: How CastleGuard Delivered World-First Translation Models On-Prem, in Weeks
Using CastleGuard’s runtime environment, our team deployed mission-ready, acronym-aware translation models — all without cloud access or lengthy development cycles. Out of the box, we’ve delivered:
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A French-Canadian model purpose-built for the Government of Canada.
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The world’s first Arabic defence-focused model, fine-tuned to regional dialects.
Our translation models outperform both Google Translate and DeepL in benchmark evaluations, delivering higher accuracy on sensitive, domain-specific content.
And the same process can be applied to any language.
Discover how CastleGuard AI can enhance your operations. Contact us for a confidential consultation or to schedule a live demo tailored to your needs.
We are trusted by Canada’s most security-conscious organizations: Department of National Defence Canada (DND) and Defence Research and Development Canada (DRDC).
On GoC SLSA list – ready for streamlined procurement.