Priced for engineering value, not calculation count.
Every commercial licence runs the same released engineering core: the same methods, the same design bases, the same warnings. Tiers differ in how many engineers use them and how they work together — never in how the shell is analysed. Prices are per year, excl. VAT.
Self-service access to Skalnav — from a no-login first look to organisation-wide licences.
- Cylinder geometry only
- Axial + bending
- EN 1993-1-6 (2007) + NASA SP-8007
- Mean basis
- Shell coverage map
- No export, no saved cases
- All 4 geometries
- All load cases
- NASA SP-8007 / 8019 / 8032, EN 1993-1-6 (2007) and the MDC method
- Mean basis — no A-/B-Basis
- Mission-profile envelope + implied-w/t theory
- Watermarked CSV + PDF export
- 3 saved cases
Academic covers education, teaching and non-commercial research only. Any commercial, contract or client work — including funded industry projects — requires a Professional licence. Validation Hub, Imperfection Hub and the Imperfection Guide are Professional features. Academic accounts are granted automatically for recognised institutional e-mail domains — other addresses start on the registered Explorer tier and can request Academic via Feedback.
- The complete released engineering core — every geometry, load case and design standard we ship, with no calculation held back from paying users
- MDC A-Basis & B-Basis — probabilistic design allowables. Fully traceable: statistical basis, inputs, and engine version on every result.
- Heritage Check — locate your design in the 1,000+ test database: nearest-neighbour ranking, similarity scores, non-conservative flagging
- Imperfection Guide (full) — 90% B-Basis, 95% envelope, lab/full-scale subsets, source citations
- Design Space Explorer and sizing workspace
- Traceable references to the original test campaigns — supporting evidence for your design review, not a substitute for qualification testing
- Commercial licence — results of your engineering work may be delivered to your clients. No separate client-deliverable licence.
- CSV, PDF, DOCX and JSON export, no watermark
- Unlimited audit-ready reports and saved cases
- Worked Examples — our recalculation of the ECCS 125 reference cases
- Product support by email
The full Professional engineering core for one named user, for 30 days. Non-renewing — it ends by itself, with no subscription to cancel. No analysis or report limits just because the licence is short.
Upgrade without losing your project-access investment. Move to Professional Annual while your 30-day access is running and the full €1,699 is credited toward your first annual licence — €9,900 less €1,699, so €8,201 remains. Credit terms.
Request 30-Day Project Access- Everything in Professional — identical engineering scope, for five engineers instead of one
- Up to 5 named accounts of your organisation, including reviewers and admins
- Shared organisation workspace with project sharing (read/write)
- Organisation roles and audit trail
- Organisation-wide MFA policy
- Batch calculation (100 cases)
- Full Validation Hub database export
- Shell Optimizer for tori-sphere heads (full)
- Priority support
Larger group? Business / Department — €49,900 / year (excl. VAT) covers up to ten named users on the same engineering scope. Ask for a quote.
- Everything in Team, across contractually agreed seats
- Programme- or department-wide deployment, scoped per engagement
- Limited v1 REST API — organisation token, ping and cylinder compute
- Scoped custom-KDF engineering engagement
- Named technical contact and an agreed onboarding package
- Qualification, integration and custom engineering work under a separate statement of work
Design Partner engagements are scoped individually, not sold as a self-service subscription. SSO/SCIM, on-premise and air-gapped deployment and a contractual uptime SLA are not currently available — where a programme requires them, they are subject to a separately scoped engagement and to feasibility review, not included in the licence.
Evaluate Skalnav against a real engineering case before wider deployment.
A paid, time-boxed engagement on an agreed representative shell case from your own programme — run and documented by us, so the evaluation produces a technical result your engineers can check rather than a demo.
- An agreed representative shell case from your programme
- Comparison against the method you use today
- Method comparison across the applicable design standards
- KDF and safety-margin analysis
- Wall-thickness and sizing comparison
- Sensitivity of the result to the governing assumptions
- Engineering-workflow comparison
- Documented assumptions, limitations and technical result
A Proof of Value shows, on your own case, how much margin your current assumptions leave and which way a knockdown for your shell moves the wall. It is an engineering investigation with a documented outcome — not a guarantee of any particular mass reduction. Extended scope from €25,000.
For qualifying early-stage engineering and aerospace companies. Skalnav came out of the same ecosystem, so the programme lowers the entry cost for the first two years — it does not lower the product.
- Year 1 — €4,900
- Year 2 — €7,400
- From year 3 — standard Professional pricing (€9,900)
- Year 1 — €14,900
- Year 2 — €22,400
- From year 3 — standard Team pricing (€29,900)
- Independent company, not a subsidiary of a larger corporate group
- Generally younger than five years
- Generally fewer than 100 employees
- Eligibility and level of support reviewed by Skalnav
The Startup Program is temporary adoption support, not a reduced product: startup licences carry the same engineering scope, the same design bases and the same commercial rights as the corresponding standard tier. Skalnav reviews each application and decides the level of support case by case.
Some decisions need judgement rather than another licence: an independent review of a verification you already have, a counter-calculation, or a customer-specific method. Those are engineering engagements, priced per scope — see Engineering Services →
BETA · Public preview ahead of full release with Structured Chaos II (Proc. R. Soc. A, in peer review). Individual modules marked Beta or Preview in the product are exactly that · contact@skalnav.com
Quantify the margin your structures really have.
Size each wall with a knockdown for its own shell, with full traceability. Start in the free Preview mode — no commitment, no credit card.
Read the publication — Proc. R. Soc. A, 2025