Computers & Structures, Inc.

What Computers & Structures, Inc. does

Computers & Structures, Inc. (CSI) is a privately held U.S. software company founded in 1975 and headquartered in Walnut Creek, California, with a second office in New York. The company develops and sells a suite of finite-element analysis (FEA) software products for structural and civil engineering, including SAP2000 (general structural analysis powered by the proprietary SAPFire 64-bit analysis engine), ETABS (building analysis), SAFE (floor systems), CSiBridge (bridges), Perform3D (performance-based seismic design), CSiPlant (pipe stress), and CSiCol (reinforced concrete columns). CSI's software supports linear, nonlinear, static, and dynamic analysis and incorporates international design-code loading assignments, custom cross-section modeling via the Section Designer utility, and an Open API (OAPI) for custom integrations.

The company's technology platform integrates with BIM and CAD ecosystems through plugins including CSiXRevit (bi-directional Revit data transfer) and CSiXCAD (CAD drawing generation), and supports interchange with AutoCAD, Prosteel, Frameworks Plus, CIS/2 STEP, SDNF, and IGES. CSI has migrated its licensing model from legacy standalone and network licenses to a Cloud Sign-in subscription framework while preserving perpetual rights for existing license holders, with a Customer Center portal for self-serve license administration, trial licenses, and software downloads.

CSI distributes software direct-to-customer through its website and customer portal, without disclosed channel partners. Its primary customer segment is structural and civil engineering firms engaged in buildings, bridges, transportation infrastructure, dams, sports facilities, and offshore systems, with secondary use by academic institutions and bridge engineering specialists. Revenue is generated through perpetual licenses, Cloud Sign-in subscriptions, maintenance and support contracts, and training/documentation services; the company is privately held with no disclosed funding rounds, M&A activity, or institutional ownership in the source data.

Name

Computers & Structures, Inc.

Legal name

Computers and Structures, Inc.

Website

https://csiamerica.com

Company type

Private

Founded year

1975

Operating status

Operating

Headcount range

101–250 employees

Short description

Computers & Structures, Inc. (CSI) is a privately held U.S. software company that develops finite-element analysis and design software (SAP2000, ETABS, SAFE, CSiBridge, Perform3D, CSiPlant, CSiCol) for structural and civil engineering firms, plus BIM exchange plugins for Revit and CAD workflows.

Ownership category

akta.pro rank

Headquarters

HQ city

Walnut Creek

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations

Revenue model

1. Software Licenses: Perpetual software licenses for structural engineering analysis and design products including SAP2000, ETABS, SAFE, CSiBridge, Perform3D, CSiPlant, and CSiCol. Legacy standalone and network licenses have been migrated to Cloud Sign-in licensing model.
2. Cloud Sign-in Subscription: Cloud-based licensing subscription model providing access to latest software versions with perpetual upgrade rights maintained during subscription period
3. Maintenance and Support: Software maintenance programs providing access to updates, technical support, and ongoing product improvements
4. Training and Documentation: Training manuals, technical documentation, and educational resources for software products

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Computers and Structures, Inc. (CSI) develops and sells a suite of structural engineering analysis and design software products, including SAP2000, ETABS, SAFE, CSiBridge, Perform3D, CSiPlant, and CSiCol, all powered by its proprietary SAPFire 64-bit finite element analysis engine. The products support linear, nonlinear, static, and dynamic analysis of buildings, bridges, floor systems, pipes, and reinforced concrete columns, and are complemented by BIM interoperability plugins (CSiXRevit, CSiXCAD) and delivered through Cloud Sign-in licensing.

Product overview

Computers and Structures, Inc. (CSI) offers a comprehensive portfolio of structural engineering software products centered around finite element analysis. The core product line includes SAP2000 (general structural analysis and design), CSiBridge (bridge analysis and design), SAFE (floor system analysis and design), ETABS (building analysis and design), Perform3D (performance-based design), CSiPlant (pipe stress analysis), and CSiCol (reinforced concrete column design). These products share interoperability through Section Designer for custom cross-sections and are complemented by BIM exchange tools including CSiXRevit (Revit plugin) and CSiXCAD (CAD platform plugin). The software suite provides comprehensive analysis capabilities including linear, nonlinear, static, and dynamic analysis across various structural engineering domains.

Differentiator

Problem solved

Functional benefit

Brands

• SAP2000: General-purpose structural analysis and design software for civil engineering applications
• ETABS
• SAFE
• CSiBridge
• PERFORM-3D
• CSiPlant
• CSiCol
• CSiXRevit
• CSiXCAD
• SAPFire

Products and services

• SAP2000

Quantifiable outcome

• Supports modeling and analysis of any structural type from simple 2D to complex 3D systems
• +1 more outcomes

Segments3 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration9 records

Feature6 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• RISA Technologies: Developer of RISA-3D, RISA-2D, RISA Foundation, and RISA Connection for structural analysis and design of buildings. Direct competitor in general structural engineering analysis software for engineering firms.
• SCIA (Nemetschek Group): Nemetschek-owned structural analysis software (SCIA Engineer) serving buildings, bridges, and industrial structures. Direct competitor in the structural engineering analysis software category.
• midas IT: Provides midas Gen, midas Civil, and midas Design+ for building and bridge structural analysis. Directly comparable to SAP2000 and CSiBridge in the engineering analysis segment.
• Strand7: Provider of Strand7 finite element analysis software used in civil, structural, and mechanical engineering. Comparable FEA capabilities competing for the same engineering customer segment.
• Dlubal Software: Develops RFEM and RSTAB, FEA-based structural analysis software for buildings, plates, shells, and frames. Closely comparable to SAP2000/ETABS in target use cases and customer profiles, particularly in Europe.
• Prokon Software: Develops structural analysis and design software including Prokon Frame Analysis and Prokon Slab. Targets the same horizontal engineering market as CSI's general-purpose products.
• Bentley Systems: Provides STAAD.Pro and RAM Elements for structural analysis and design — direct competitors to SAP2000, ETABS, and SAFE across buildings and bridges. Targets the same structural/civil engineering customer base.

Broad incumbents

• ANSYS: Broad engineering simulation platform with structural mechanics capabilities competing at the high-end FEA/professional analysis tier. While not specialized for building codes, ANSYS competes for performance-based engineering and nonlinear analysis use cases that Perform3D addresses.
• Autodesk: Owner of Revit (the dominant BIM platform) and Robot Structural Analysis Professional. While Autodesk offers structural analysis natively in its ecosystem, CSI competes head-on with Robot and relies on Revit interop — making Autodesk both the largest adjacent incumbent and a critical ecosystem partner.
• Trimble: Owner of Tekla Structures for structural BIM and Trimble Connect. Provides structural detailing and coordination that overlaps with CSI's BIM exchange plugin offering and adjacent structural workflow tools.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/csiamericasoft
• Facebookfacebook.com/computersandstructures

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Computers & Structures, Inc.