Dlubal RFEM dominates German, Austrian, and Swiss structural engineering. FrameAI fights back on the workflow problems that cost engineers hours every week. Here's the honest comparison.
Feature Comparison Matrix
| Feature | FrameAI | Dlubal RFEM |
|---|---|---|
| General modeling 3D model creation and geometry handling | ⚠️ AI-assisted geometry from PDF/IFC — no native modeler | ✓ Full 3D FEM modeler — powerful but steep learning curve |
| EC3 ULS design EN 1993-1-1 member checks per connection | ✓ EN 1993-1-1 ULS member checks per connection | ✓ RF-STEEL EC3 — comprehensive ULS across full model |
| EC3 SLS design EN 1993-1-1 SLS deflection and vibration checks | ✓ EN 1993-1-1 SLS deflection and vibration checks | ✓ SLS checks integrated in Steel Design add-on |
| EC3 fire design (EN 1993-1-2) Fire resistance checks for steel members | ✗ Not yet — on roadmap for Q3 2025 | ✓ RF-STEEL EC3 Fire — full fire resistance checks |
| EC8 seismic design EN 1998-1 response spectra, q-factor | ✗ Not available | ✓ RF-DYNAM Pro + equivalent lateral force method |
| Connection design (EN 1993-1-8) Component-based, traceable calcs | ✓ AI-native connection design — component-based, traceable calcs | ⚠️ Steel Joints add-on — FE-based, capable but manual setup per connection |
| IFC 4.3 import Reads geometry and load data from BIM models | ✓ Full IFC 4.3 import — reads geometry and load data from BIM models | ✓ Full IFC 4.3 import via BIM interface |
| IFC 4.3 export Bidirectional BIM integration | ⚠️ IFC export planned — currently exports connection geometry as data exchange | ✓ Full IFC 4.3 export — bidirectional BIM integration |
| BCF roundtrip (BIM Collaboration Format) Issue tracking integration | ⚠️ Planned Q3 2025 — issue tracking integration | ✓ BCF management built into project workflow |
| PDF drawing intake GPT-4o extracts geometry from any structural PDF | ✓ PDF → geometry AI extraction → connection model | ✗ No PDF intake — model must be built from scratch or imported via IFC |
| AI-assisted modeling AI interprets drawings, suggests geometry, auto-populates section data | ✓ Core feature — AI interprets drawings, suggests geometry, auto-populates section data | ⚠️ Mia AI assistant — FAQ and workflow help, not modeling assistance |
| Batch runs / overnight automation Automated batch on multiple connection variants — runs while you sleep | ✓ Automated overnight batch on multiple connection variants — runs while you sleep | ⚠️ API-based automation possible (Python/C#) but requires scripting — no native batch runner |
| National Annex coverage (DE/AT/CH/NL/ES/IT) DIN, ÖNORM, SNF, NEN, NF parameters | ⚠️ DE, AT, CH, NL, ES covered — IT under development | ✓ All 6 covered with full National Annex parameter sets |
| Tekla / Revit interop Bidirectional links with major BIM tools | ⚠️ IFC import only — no native Tekla or Revit plugin | ✓ Native Tekla and Revit links — bidirectional |
| Fabrication shop drawings Connection sketches with bolt schedules and material lists | ✓ Auto-generated connection sketches with bolt schedules and material lists | ⚠️ CAD add-on available for layout drawings — connection-level output is manual |
| Pricing transparency Clear tiers vs opaque RFQ with module stacking | ✓ Clear tiers — see pricing page — no module stacking | ✗ Opaque RFQ — base ~€2,500/yr + per-module costs stacked |
When to Pick Dlubal RFEM
Be honest with your readers. RFEM wins in specific scenarios — don't pretend otherwise.
If your project requires modal analysis, response spectrum analysis, or time-history seismic analysis, RF-DYNAM Pro is the gold standard in the DACH market. FrameAI has no seismic module.
RFEM handles concrete, timber, glass, and membranes in the same model — not just steel. If you're doing mixed-material structures or facade engineering, this matters.
Dlubal has offices in Germany, Austria, Czech Republic, and strong local partners across the DACH region. For firms that rely on responsive phone/email support in German, this is a real differentiator.
RFEM's direct interfaces with Rhino/Grasshopper, full parametric modeling, and arbitrary geometry support make it the better choice for unconventional structures — tensile, shell-based, or non-standard forms.
When to Pick FrameAI
RFEM has no PDF intake. FrameAI extracts geometry from PDF drawings and converts to usable connection models. If your workflow starts with a scanned drawing from the architect, this is the difference between hours of manual tracing and minutes of AI processing.
FrameAI runs batch calculations on multiple connection variants while you sleep. RFEM's batch capability requires Python scripting via the API — workable, but not native. If you do production connection design at scale, automation is a day-per-week time saver.
RFEM pricing is opaque — you request a quote and negotiate. Module stacking means your effective cost depends on which add-ons you need. FrameAI publishes its pricing. You know what you're paying before you sign.
RFEM: base program + Steel Joints add-on + RF-STEEL EC3 + maybe RF-DYNAM Pro depending on your project. Each is a separate license line. FrameAI includes connection design in its core subscription — no nickel-and-dime add-on stack.
Pricing: RFEM Module Stack vs FrameAI Tiers
| Component | RFEM Approximate Cost | FrameAI |
|---|---|---|
| Base program | ~€2,500–3,500/yr (subscription) or ~€5,000 (perpetual + service contract) | Included in paid tier |
| Steel Joints / Connection Design | ~€800–1,200/yr (add-on module) | Included |
| EC3 member design (ULS/SLS) | Included in Steel Design add-on (~€600–1,000/yr) | Included |
| EC8 seismic analysis | RF-DYNAM Pro — ~€1,200–2,000/yr | Not available |
| PDF drawing intake | Not available | Included (AI extraction) |
| Batch overnight runs | Requires API scripting (no native batch) | Native batch runner included |
| Shop drawings | CAD add-on — additional cost | Included |
| Estimated annual cost (steel connection focus) | ~€3,500–5,000+/yr | €149/mo (€1,788/yr) |
RFEM pricing is based on publicly available ranges and partner quotes — actual costs require RFQ to Dlubal. Module stack cost varies significantly by project scope.
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