Direct comparison · EN structural engineering · Global building analysis

FrameAI vs ETABS —
EN structural analysis & fabrication, honestly compared

ETABS (CSI Products) is the global industry standard for building FEM analysis — concrete and steel multi-storey frames, seismic performance-based design, slabs, and shear walls. FrameAI is the autonomous downstream layer: PDF intake, EN 1993-1-8 connection iteration, and DSTV NC1 fabrication export. They're often used together, not instead of each other.

Try free EN calculators → See pricing
30s
FrameAI: first calc
~$10k+
ETABS perpetual / seat
$0
FrameAI free tier
40+yr
CSI market presence
When to reach for each

ETABS is the right tool for global building analysis: concrete and steel multi-storey frames, performance-based seismic design, slabs, shear walls, P-delta, and full code checking (EN/AISC/ACI) in one model. FrameAI is the right tool for connection-level detail design and fabrication output: EN 1993-1-8 bolt/weld/plate checks with full component method, autonomous PDF drawing intake, and DSTV NC1 CNC export. Many engineering teams use ETABS for global analysis and FrameAI for connection sign-off and shop-drawing production.

Feature comparison — EN structural engineering

Feature FrameAI ETABS
EN 1993-1-1 steel member checks Cross-section class, LTB, flexural buckling, interaction ✓ Yes ✓ Full FEM
EN 1993-1-8 connection design Full component method, T-stub mode transitions, auto bolt escalation ✓ Full component method Simplified templates only
DSTV NC1 7th edition fabrication export CNC drill/saw line — holes, cuts, part marks, BO coordinates ✓ Built-in ✗ Not supported
PDF drawing intake (AI extraction) Auto-extract member schedule + loads from any structural PDF ✓ GPT-4o vision ✗ Manual entry
3D BIM / full building FEM solver Concrete frames, slabs, shear walls, P-delta, seismic performance ✗ Not a FEM solver ✓ Core product
Parametric shop drawings (DXF / PDF) Part marks, dimensions, weld schedule, material callouts ✓ Auto-generated Manual via ETABS Drawing Sheet
EN 1992-1-1 reinforced concrete Bending, shear, crack width, rebar schedule (BS 8666) ✓ Yes ✓ Yes (ACI 318 / Eurocode)
EN 1998-1 seismic design Response spectra, q-factor, ductility class DCM/DCH ✓ Seismic calcs + q-factor ✓ Full performance-based seismic
Deployment model How engineers access the software Browser — no install Windows desktop + license server
Free tier availability No credit card, permanent free access ✓ Unlimited calculators ✗ No free tier
IFC 4 / SAF file support Import/export for BIM workflows with Tekla, Revit, ArchiCAD ✓ IFC 4 + SAF v2.x export ✓ IFC import/export
National Annex support NL (NEN-EN), DE (DIN-EN), BE, FR, IT, UK ✓ 9 NAs, localized UI EN/NL/DE ✓ EN + broad international codes

Honest assessment — where each tool wins

Where ETABS wins
Global building analysis — the industry standard
  • Full 3D building FEM: concrete and steel multi-storey frames, slabs, shear walls, cores, and complex geometries — not just member checks
  • Performance-based seismic design: pushover analysis, capacity spectrum method, ASCE 41 / EN 1998-1 performance levels — essential for high-rise and critical structures
  • P-delta and large-displacement nonlinear analysis: geometric and material nonlinearity for tall buildings and slender structures
  • 40+ years of validation and regulatory acceptance: checking authorities in the US, Middle East, and Asia-Pacific accept ETABS output without additional verification
  • Concrete design integration: combined analysis and design for concrete slabs, walls, columns, and foundations in one model
  • CSI API for custom scripts and integrations: parametric model generation, batch runs, and custom output via the official API
Where FrameAI wins
Autonomous intake, connection depth, and fabrication speed
  • PDF drawing intake: upload any structural PDF and get member schedule, connection specs, and EN code checks extracted automatically — no manual model entry required
  • EN 1993-1-8 connection design depth: full component method with T-stub mode transitions, auto bolt-grade escalation (8.8→10.9→12.9), weld auto-sizing — ETABS uses simplified templates for connection design
  • DSTV NC1 7th edition built-in: fabrication NC1 files per part mark ready for CNC drill/saw lines — ETABS has no NC1 path at all
  • Browser-native: no Windows install, no license server, no IT procurement. Any engineer with a browser can run a connection check in 30 seconds
  • Free public calculators: bolt capacity, weld sizing, endplate moment, fin plate, baseplate, composite beam — no account, no install, no license needed
  • Price: FrameAI starts at free and goes to €149/yr for Structural — ETABS perpetual starts at ~$10,000+ per seat (public reseller estimates)

Pricing comparison

CSI Products
ETABS
Perpetual (single user) ~$10,000+ USD
Annual maintenance ~15% of list price/yr
Subscription ~$3,500–5,000/yr USD
Windows desktop required.
License server or CSI Cloud licensing.
No free tier; 30-day trial available.
Annual maintenance required for updates and support.
FrameAI
Free → Structural → Studio
Free: unlimited public calculators + 1 PDF/month.
Pro: 50 PDFs/month + full EN reports + DXF + DSTV NC1.
Studio: team workspaces, API access, custom branding.
No install. No maintenance contracts. No seat minimums.
See all plans →

ETABS pricing based on public reseller estimates as of June 2026. Actual pricing varies by region, quantity, and negotiated agreements. Contact CSI Products directly for current quotes. FrameAI pricing is as listed on /pricing.

Frequently asked questions

Does FrameAI replace ETABS for structural building design?
No, and we're explicit about this. ETABS is the global industry standard for building FEM — concrete and steel multi-storey frames, slabs, shear walls, P-delta, and full performance-based seismic design in one model. FrameAI is purpose-built for the downstream connection-design and fabrication-output layer: EN 1993-1-8 bolt/weld/plate checks with full component method, autonomous PDF drawing intake via GPT-4o, and DSTV NC1 fabrication export. Many engineering teams use ETABS for global analysis and FrameAI for connection iteration and shop-drawing production.
Can FrameAI import an ETABS model?
Yes. Export your ETABS model to IFC 4 (Analyze → Export to IFC) and upload to FrameAI for EN 1993-1-8 connection checks, DSTV NC1 fabrication export, and parametric shop drawings. FrameAI also accepts SAF v2.x. Alternatively, upload the structural PDF drawing set and FrameAI's GPT-4o intake pipeline extracts the member schedule and connection geometry automatically — no manual model entry required.
Does ETABS export DSTV NC1 files?
ETABS does not natively export DSTV NC1 files for steel CNC fabrication. Fabrication-ready NC1 files typically require a Tekla Structures model or a dedicated nesting/CAM tool. FrameAI exports DSTV NC1 7th edition directly — correct neutral-axis BO coordinates, hole blocks, part marks, and all required sections — as a batch ZIP per project. If your downstream workflow goes to a CNC drill/saw line, FrameAI has a direct path that ETABS does not.
What are ETABS licensing costs in 2026?
ETABS is sold by CSI Products (Computers and Structures, Inc.) on a perpetual or subscription basis. Public reseller estimates suggest perpetual licenses start at ~$10,000+ USD per seat, with annual maintenance at ~15% of list price. Subscription pricing is typically lower. FrameAI starts at free (public calculators) and goes to €149/yr for Structural — no seat minimums, no install, no maintenance contracts required.
Does FrameAI support Eurocode National Annexes for Dutch and Belgian projects?
Yes. Dutch NEN-EN and Belgian National Annexes are first-class in FrameAI — not add-ons. The calculator interface is fully localized in Dutch (NL) and German (DE), and National Annex partial factors flow through every EN 1993, EN 1994, EN 1992, and EN 1998 check. ETABS also supports EN Eurocode via regional settings, making it viable for European building projects as well. FrameAI's advantage is the connection-level depth and autonomous PDF intake at a fraction of the cost.
Is there a path from ETABS to fabrication output via FrameAI?
Yes. The typical workflow is: (1) Model in ETABS → global analysis and member design. (2) Export to IFC → upload to FrameAI for connection-level checks and DSTV NC1 fabrication export. (3) Optionally run FrameAI's PDF intake on the structural drawings to auto-extract member schedules and cross-reference against the ETABS model. This gives you the global analysis depth of ETABS with the fabrication-ready output of FrameAI — without manual model rebuild.

Try the free EN calculators — no credit card.

Public bolt capacity, weld sizing, endplate moment, fin plate, baseplate, composite beam, and shear stud calculators. EN 1993/1994 results in the browser in 30 seconds. No ETABS license needed.

Open free calculators → View Pricing →
FrameAI vs SAP2000 → FrameAI vs SCIA Engineer → FrameAI vs SCIA (steel) → FrameAI vs IDEA StatiCa → Compare all competitors → EN 1993-1-8 endplate calculator →