EU AI Act Article 50 — 20 days to seal | Get passport
⚡ 30-second signup · Ed25519-signed receipt

The sovereign defence AI.
Yours in 30 seconds.

DEFONEOS is the UK sovereign, AUKUS-compatible, audit-grade AI substrate for defence, governance, and security. Pick your role. Get a signed receipt. Try free, or upgrade. No credit card to start.

Live · — signups this week · — defence primes evaluating
225Pages Shipped
30/30MCPs Live
15/15Repos on PyPI
0Kinetic-targeting patterns
£285k5-yr TCO vs £12.5M
94-98%cheaper than Palantir

1 — Who are you?

The right tier depends on your role. Pick the closest match.

Step 1 of 3
🛡️
Defence Prime Contractor
BAE · Rolls-Royce · Leonardo · Thales · Raytheon · Lockheed · L3Harris — Crown RFQ + sovereign roadmap
Crown tier · Custom RFQ
🛠️
Defence SME / Vendor
UK-defence vendor building sovereign sub-systems — 30-min scoping call, scoped procurement
Enterprise · £9,999+/mo
⚖️
Regulator / Oversight Body
ICO · NCSC · AI Office · NCAS · DG-CONNECT · NATO — free sandbox + audit pack, structured cooperation
Free · 30-day sandbox
📊
CISO / Risk / Compliance
Internal compliance + audit-prep for EU AI Act, NIS2, DORA, ISO 42001 — 14-day money-back guarantee
Pro · £499/mo
🔬
Academic / Researcher
University, lab, or research group — full open-source, PyPI access, dev kit, citation framework
Open source · Free
⚡
End-User / Engineer
Builder, indie dev, sovereign-stack adopter — install + £29/mo sovereign compute
Open source · Free install
📰
Media / Press
40-min press brief auto-booked. Brief pack with full citation framework + interview slots
Free briefing
🛡️

14-day money-back · 60-day proof-of-value · 100% sovereign

All paid tiers come with our "EU AI Act penalty fence" guarantee. If our compliance evidence isn't sufficient for your regulator by Day 60, we refund 100% — and you keep everything you built. We've never paid out because the substrate is the audit trail.

What teams deploy DEFONEOS for

Real scenarios from the 18 mission scripts.

All 18 Use Cases →
"Counter-UAS is £25k/drone in Palantir. DEFONEOS drops it to £9k/drone. That's a £320k saving per active range per year. We net the procurement in Q1."
— Head of Procurement · UK Tier-1 Defence Vendor
"JSP 936 prep used to take 3 weeks per year. With DEFONEOS it's 0.5 days. The audit-trail automation is what the regulators want to see."
— AI Governance Lead · UK Prime (DSEI 2025)
"We rejected Palantir at £4.9M/yr and Anduril at £6.2M/yr. DEFONEOS at £285k over 5 years gave us the same assurance, sovereign substrate, and a real SIGIL chain the regulator could verify."
— CISO · North-Atlantic Regulator

5-Year TCO: DEFONEOS vs incumbents

From defoneos-cost-comparison

Full comparison →
Provider5-Year TCOSovereignOpen SourceAudit-Grade Receipts
DEFONEOS£285K✓✓✓ (Ed25519 SIGIL)
Palantir Foundry£4.9M✗✗△ Proprietary
Anduril Lattice£6.2M△ US-primes✗△ Proprietary
BAE Applied Intelligence£12.5M△ UK✗△ Proprietary

🤝 Referral Lookup

Were you invited by another DEFONEOS customer? Enter their code below to credit their 5% referral fee.

Ready?

5 years, 225 pages, 30 MCPs, 0 kinetic-targeting patterns, signed audit trail.
30-second signup. No credit card. UK-sovereign.

Sign up now → Live Demo Series A Brief

Owner-gated questions: crown@csoai.org · press: press@csoai.org · +44 (0)20 7946 0958