CSI ETABS
Integrated structural analysis and design software for multi-story buildings (steel/concrete frame, shear-wall, seismic, composite) on CSI's 64-bit SAPFire engine, sharing the CSI OAPI automation layer with SAP2000, SAFE, and CSiBridge.
3.6 /5 composite score
C2 3/5 reflects the CSI OAPI across VBA, VB.NET, C#, C++, Python, and MATLAB, and C1 4/5 reflects public perpetual pricing from USD 7,293 to USD 17,504 plus maintenance. C5 4/5 reflects Revit, SAP2000, SAFE, and CSiBridge interoperability.
Solid
Rubric Scorecard
| Criterion | Score | Evidence |
|---|---|---|
| Value for the price | 4/5 | perpetual, from $7293 Source → |
| Agent Friendliness | 3/5 | API: CSI OAPI (VBA, VB.NET, C#, C++, Python, MATLAB) -- shared with SAP2000/SAFE/CSiBridge; free with a valid license, but CSI does not officially support third-party OAPI tooling Source → |
| Ease of adoption | 3/5 | -- |
| Portability & lock-in | 4/5 | 3 file formats |
| Interoperability | 4/5 | 4 integrations |
Pricing
Modelperpetual
Entry price$7293
Free tierno
Trialyes
TiersPlus ($7293), Nonlinear ($11669), Ultimate ($17504)
How we verified this: we checked CSI ETABS against its live site and an independent source — github.com. Nothing on this page is listed from memory. See how we grade. Verified 2026-07-07.
Evidence
File formats
| Format | Direction | Support |
|---|---|---|
| EDB | unknown | unknown |
| IFC | unknown | unknown |
| E2K | unknown | unknown |
Integrations
Revit (CSI x Revit link) SAP2000 SAFE CSiBridge
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