British software & AI company · est. 2016

Craftsmen and purveyors of smart systems.

Fizl Ltd is a software house and AI research lab. We deliver full-lifecycle engineering — web, desktop, embedded, networks and hosting — and we build Ariadne, an AI orchestration platform that keeps working after everyone else has gone home, and Fizl TrustVault, a secrets and key service for organisations that would rather hold their own keys. Engineered in Britain, with models trained on our own Grace Blackwell cluster.

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2016UK-registered, independently owned

Grace BlackwellIn-house AI training cluster

24/7Ariadne works around the clock

Our product

Ariadne — one AI orchestration platform for the whole organisation.

Ariadne brings agents, memory, tools and integrations together into one continuous workflow. It holds long-term goals, notices what changes, acts on your systems, and verifies the results — day and night.

Goal-driven autonomy. Set goals with success criteria; Ariadne plans and acts, and an independent evaluator confirms the job is genuinely done.
One shared workspace. Chat, code, query, project workspaces, deep research, notes, whiteboard, testing, DevOps and support — used by your people and their agents side by side.
The MCP context lake. Your organisation's knowledge, exposed over MCP to any compatible agent — inside Ariadne, in your IDE, anywhere — plus a 5,000+ integration catalogue installed in one click.
Private by design. Self-host on your own hardware or run it in your cloud. Your data, your models, your rules.

See how Ariadne works → Try it free

The Ariadne mark — a Conway glider in flight. Emergence, not instruction.

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Sealed by design

The master key lives only in memory, only after a deliberate unseal — and never survives a restart.

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Hardware-backed

YubiKeys, smart cards and PKCS#11 HSMs. The vault relays the operation; the key never leaves the device.

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Your own CA

Root and intermediate CAs with a built-in ACME server, so internal hosts renew their own TLS.

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Release signing

Authenticode, Android APK and JAR signing with the key in the vault, not on the build agent.

Also from Fizl

Fizl TrustVault — the keys to everything, somewhere you trust.

A self-hosted secrets, key and certificate service. It covers the ground of Azure Key Vault, AWS Secrets Manager and KMS — on your hardware, inside your boundary, with no hyperscaler in the path.

One service, one audit trail. Secrets with versions and rotation, cryptographic keys, a certificate authority, code signing, OpenPGP and SSH material, and the identity to reach them.
Cryptography, not disclosure. Applications ask the vault to encrypt, sign or unwrap. Private key material stays inside — and for hardware keys, stays on the device.
Drop in, don't rewrite. Key Vault style routes, an OpenBao/Vault compatible API, ACME and OpenID Connect, so existing tooling needs a new URL rather than a new design.
Where Ariadne keeps its credentials. Built so a self-hosted agent platform can act on real systems without ever being able to read the secrets it uses.

Explore TrustVault → See the capabilities

Software development

Full-lifecycle delivery in C#, C++, SQL and TypeScript — web, desktop, embedded and smart-card systems, architected with ArchiMate.

Network infrastructure

Resilient design across L2/L3, BGP, DNS, PKI, Hyper-V, Kubernetes, firewalls and VPNs including MPLS/ExpressRoute.

Hosting & platforms

Windows, Linux and FreeBSD servers, ASP.NET sites, MS SQL and NoSQL — provisioned and maintained.

Consulting & support

Cost savings, efficiency gains and rapid troubleshooting, plus hands-on cloud provisioning across Azure, AWS and Google Cloud.

Beyond the platform

The engineering team behind the AI.

Ariadne is built by a working consultancy. The same team that trains our models can turn your idea into a product, harden your infrastructure, or untangle a difficult IT problem.

Fully equipped with MSDN Enterprise licenses, our own production servers, a secure remote-access solution and specialist contacts across almost every corner of IT.

Talk to the team →

Foundation models

The models we train in-house.

Trained on our own Grace Blackwell cluster — tuned for speed, intelligence and the ability to act, not just answer.

Diffusion · NVFP4

Kaja-Flash

A native NVFP4 high-speed diffusion foundation model built for real-time, high-throughput generation.

Throughput: 700 tg/s
Reference: 1 petaFLOP
Best for: Low-latency

Reasoning

Kaja-Base

A high-intelligence foundation model for the heavy reasoning and planning at Ariadne's core.

Throughput: 300 tg/s
Reference: 1 petaFLOP
Best for: Deep reasoning

Omnimodal

Chikara-Instruct

A fine-tuned NVIDIA omnimodel with text, image, audio and action support for grounded, multi-modal tasks.

Modalities: 4
Actions: Native
Best for: Multi-modal

Ariadne itself is model-agnostic — run it on our Kaja models, on Anthropic Claude, OpenAI GPT or Qwen, or point it at any OpenAI-compatible endpoint.

The company

A software house with a research lab attached.

Fizl Ltd is a British software and AI company. When we're not delivering for clients, we're in the lab — building a genuinely adaptive form of AI on our own Grace Blackwell cluster.

We describe what we're building as Level 2–3 synthetic intelligence: systems that don't just recognise inputs, but generate and enact strategies to reach long-term goals — and adjust those goals as the world changes.

Founded and led by Simon Soanes. Read more on the blog, explore our open work on GitHub, or dig into the research behind Ariadne.

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Est. 2016

UK company no. 10374740, independently owned.

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R&D-first

A working lab exploring self-learning AI beyond machine learning.

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Own cluster

Models trained on our in-house Grace Blackwell hardware.

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Trust

Private-by-design deployments; your data stays yours.