🤖
Model in one sentence
Generate and edit structural models from natural language — "5-story RC frame, 6 m column spacing" builds the model for you.
OpenSees-based · KDS / KBC / KCI / FEMA · AI-assisted
Structural analysis and design,
Structural analysis and design,
verified to the millimeter.
A desktop platform that takes you from 3D modeling through nonlinear analysis to code-compliant RC design — built on the OpenSees solver and cross-verified against industry references within ±3%.
Free during beta · Windows 10/11 · No credit card
🧊Screenshot / GIF slot — replaced via admin upload
Powered by OpenSees (UC Berkeley)
Standards KDS · KBC · KCI · FEMA
Verified Within ±3% of industry references
Why STRIX
One model. One source of truth.
One model. One source of truth.
No tool-switching.
Conventional workflows scatter modeling, analysis, design and reporting across disconnected tools — re-keying data, reconciling sign conventions, and trusting black-box results. STRIX closes the loop.
Disconnected tools
Conventional
Model in one app, analyze in another, design in a third. Every hand-off risks transcription error.
Model in one app, analyze in another, design in a third. Every hand-off risks transcription error.
With STRIX →
Single integrated platform — modeling → analysis → design → report in one window.
Single integrated platform — modeling → analysis → design → report in one window.
Black-box results
Conventional
Numbers without provenance. You cannot see which combination governed or why a member passed.
Numbers without provenance. You cannot see which combination governed or why a member passed.
With STRIX →
Result DNA traces every design value back to its governing combination and code clause.
Result DNA traces every design value back to its governing combination and code clause.
Unverified accuracy
Conventional
Trusting a solver without independent confirmation against a known reference.
Trusting a solver without independent confirmation against a known reference.
With STRIX →
Cross-verified against MIDAS / ETABS on modal periods, member forces and design results.
Cross-verified against MIDAS / ETABS on modal periods, member forces and design results.
Core capabilities
Everything an engineer needs,
Everything an engineer needs,
in a single window.
Modeling, multi-type analysis, code design and submission-ready reports — engineered to agree with the standards, not to approximate them.
💬
KDS answers, in-app
A built-in AI chatbot explains KDS design provisions in real time, so the basis for every decision is one question away.
🔬
Catch errors before you run
Before analysis, AI inspects the model for modeling errors and weak points and suggests how to fix them.
📐
Governing-member targeting
Auto-identify governing members and change sections in bulk — collapse repetitive design iterations into seconds.
🔧
Standalone member designers
Dedicated design tools for beams, columns, basement walls, shear walls and footings — detailed per-member checks on demand.
🏢
Wall buildings, automatically
Auto-apply wall-structure loads and verify them with precise plate analysis — no manual load distribution.
📈
Seismic performance, precisely
Integrated ATC-40 Pushover and nonlinear time-history analysis for rigorous seismic performance assessment.
📄
From DXF to 3D model
Import CAD DXF drawings and auto-generate the 3D structural model — analyze immediately, no re-drawing.
💡
Built on engineer feedback
A fast update cycle that turns practicing engineers’ requests into shipped features — what the field needs, quickly.
Live product
See the real thing in motion
A clean, engineer-first interface — from the 3D viewport to deformed shapes, force diagrams and design dialogs. These are real captures from the application.
🖥️Screenshot / GIF slot — replaced via admin upload
Verification
We earn trust with data,
We earn trust with data,
not logos.
STRIX is cross-verified against established industry references. Below is a representative summary — the full methodology and case-by-case results live on the Verification page.
| Quantity | STRIX | Reference | Δ |
|---|---|---|---|
| Membrane stress (NAFEMS LE1) | 90.8514 MPa | 92.7 MPa | −1.994% |
| 1st mode period (RSA frame) | 1.56213 s | 1.562 s | +0.0080% |
| P-M-M hinge capacity (custom element) | 7.0871×10⁷ N·mm | 7.0871×10⁷ N·mm | 0.00% |
| Peak displacement (THA time history) | 200.783 mm | 200.786209 mm | −0.0016% |
Real results from the 21-benchmark closed-form verification suite — click a row to open its report.
Representative figures. References used for verification only — no competitor UI, table layout or content is reproduced.
AI-assisted engineering
Model with natural language
Describe the structure in plain language — "5-story RC frame, 6 m column spacing" — and STRIX drafts the model for you. Bring your own API key; your project data stays local.
Natural-language modeling
Generate nodes, members and loads from text. Cut repetitive input dramatically.
AI structural review
Automated sanity checks flag anomalous behavior and vulnerable members.
BYOK & local-first
Use your own Anthropic API key. Models run on your data locally — nothing is uploaded to us.
🤖AI modeling demo video slot
Workflow
Five steps, modeling to report
Model
Nodes, members, walls, sections & materials
Load
Self-weight, live, wind & seismic auto-calc
Analyze
Linear, modal, RSA, Pushover, time-history
Design
Auto rebar design & STRIX checks
Report
Editable PDF & Excel export
Who it is for
Built for working structural teams
🏢
Design offices
Take projects from model to stamped report without leaving one environment — faster turnarounds, fewer hand-off errors.
🔬
Research & academia
Full OpenSees power with nonlinear and Pushover analysis, without writing TCL scripts.
✅
Plan review & QA
Result DNA exposes the governing combination and code clause behind every number — auditable by design.
Pricing
Transparent, self-serve pricing
No "request a quote." Clear plans, instant subscription — see exactly what you pay before you commit.
Beta
Free during beta
- Full modeling & analysis
- RC design & reports
- Community support
Most popular
Professional
Coming soon self-serve subscription
- Everything in Beta
- Priority updates & support
- Commercial use license
Team / Company
Coming soon seat pool & members
- Shared seat pool
- Member & role management
- Centralized billing
Paid plans open at commercial launch — STRIX is free during the beta.
Start building with STRIX today
Download the Windows app and run a verified analysis in minutes. Free during beta.
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⏱ Your beta period has ended.
Latest: v1.0.0 · Auto-update supported · OpenSees bundled