Computers & Structures, Inc.
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.
- Company typePrivate
- Founded1975
- HeadquartersWalnut Creek, United States
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
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.
Computers & Structures, Inc. firmographics
Firmographics- 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
Where Computers & Structures, Inc. is headquartered
LocationHeadquarters
- HQ city
- Walnut Creek
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Computers & Structures, Inc. business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- 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.
- Cloud Sign-in Subscription: Cloud-based licensing subscription model providing access to latest software versions with perpetual upgrade rights maintained during subscription period
- Maintenance and Support: Software maintenance programs providing access to updates, technical support, and ongoing product improvements
- Training and Documentation: Training manuals, technical documentation, and educational resources for software products
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Cloud Sign-in Licensing (current standard) |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
Computers & Structures, Inc. product offering
Product offeringCore 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
Companies that use Computers & Structures, Inc.
Customer profileSegments3 records
Ideal customer profiles1 record
Computers & Structures, Inc. technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration9 records
Feature6 records
Computers & Structures, Inc. partnerships and signals
Strategic signalScale indicators2 records
Recent moves5 records
Expansion highlights5 records
Computers & Structures, Inc. competitors and assessment
Company assessmentDirect 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
Computers & Structures, Inc. social profiles
Digital presenceComputers & Structures, Inc. financial estimates
Financial estimateRevenue estimate
Valuation estimate
Computers & Structures, Inc. leadership team
Management profileNumber of profiles
Profiles1 record
Computers & Structures, Inc. funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Computers & Structures, Inc. M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Computers & Structures, Inc.
What does Computers & Structures, Inc. do?
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.
Is Computers & Structures, Inc. a public or private company?
Computers & Structures, Inc. is a private company. It is classified as unknown and is currently operating.
When was Computers & Structures, Inc. founded?
Computers & Structures, Inc. was founded in 1975. It employs 101 to 250 people.
Where is Computers & Structures, Inc. based?
Computers & Structures, Inc. is headquartered in Walnut Creek, United States, in the North America region.
How does Computers & Structures, Inc. make money?
Four revenue lines are on record. Software Licenses are the primary driver. The others are cloud Sign-in Subscription, maintenance and Support and training and Documentation.
Who are Computers & Structures, Inc.'s main competitors?
Direct peers on record are RISA Technologies, SCIA (Nemetschek Group), midas IT, Strand7, Dlubal Software, Prokon Software and Bentley Systems. Broad incumbents are ANSYS, Autodesk and Trimble.
Does Computers & Structures, Inc. have an API?
Yes. SAP2000 provides an Open Application Programming Interface (OAPI) that allows developers to create custom programming applications linking related design platforms to SAP2000 function. Visual Basic and most standard languages are supported. Developer documentation is at www.csiberkeley.com/sap2000/oapi.