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    About IMSI Design

    Pioneering CAD innovation for 30 years.

    We make design software for people whose drawings turn into real objects — buildings, parts, furniture, kitchens. Three product families, one long-running promise: the licence you buy keeps working, and the file you drew last decade still opens.
    1996 2026
    What we build

    Professional CAD, priced for the people who use it

    Most CAD vendors moved everyone onto mandatory subscription. We did not. TurboCAD, DesignCAD and FloorPlan are still sold as perpetual licences alongside term options, because a one-person shop and a fifty-seat engineering team do not have the same relationship with a recurring bill.
    That is also why we keep archived installers online, why upgrade pricing reaches back years rather than months, and why support can still find a key issued a decade ago. Design tools become infrastructure for the people who rely on them, and infrastructure should not disappear on a release schedule.

    Precision first

    A CAD file is a legal and manufacturing document. Everything we ship is judged on whether the geometry holds up when somebody builds from it.

    Ownership, not rental

    Perpetual licences stay on the price list. Subscription is an option we offer, not a lever we pull on people who already paid.

    Long memory

    Archived installers, keys we can still look up, and upgrade paths that reach back years — because your drawings outlast our release cycle.
    Thirty years of it

    What people have built with our software.

    Barcelona pavillion
    Barcelona pavillionMarian Jurcak
    Gold diamond ring
    Gold diamond ringDon Cheke
    Okieboat
    OkieboatPhil Hays
    Modern living room
    Modern living roomMarian Jurcak
    Radial engine
    Radial engineDon Cheke
    Interior design kitchen design floorplan
    Interior design kitchen design floorplan
    House elevation
    House elevation
    Playground concept design
    Playground concept designDon Cheke
    Customers

    Four of them let us write it up.

    The work above is customer work. These four agreed to be named and to say what the software does for their business.

    Alpha Omega Computer SystemsOceanography, satellite and RF hardware · since 1977Read the case study →Arvak TechnologiesAerospace and defence engineering consultancyRead the case study →Kras.DesignProduct design and visualisation · NetherlandsRead the case study →Omaha Community PlayhouseTheatre set design · Omaha, NebraskaRead the case study →

    Named with permission, from the case studies published on this site. All case studies →

    Work with us

    Partners, resellers, schools

    Become a reseller

    Sell IMSI Design products in your territory with margin and marketing support.
    Ask about reselling →

    Technology partners

    Kernels, renderers and plug-in developers who build on top of our platform.
    See partners →

    Students & educators

    Classroom and individual academic licensing for schools and colleges.
    Academic pricing →

    Affiliate program

    Earn commission referring readers and viewers to products you already use.
    How it works →
    Technology partners

    What TurboCAD is built on

    Lightworks

    Integrated photorealistic rendering, embedded in over 80 applications. TurboCAD 3D owners on Windows can add the Lightworks rendering engine and materials library as a plug-in.

    Redway3d

    A single visualisation API from 2D to real-time 3D and photorealistic rendering, from an independent developer in Paris.

    Siemens Digital Industries Software

    PLM components for modelling and simulation. TurboCAD Platinum uses the D-Cubed™ 2D DCM, the industry-standard geometric constraint solver for parametric sketching.

    Spatial Corp.

    3D software components for application developers, including the ACIS modelling kernel.

    Open Design Alliance

    The non-profit consortium behind .dwg interoperability. IMSI Design is a founding member, and TurboCAD reads and writes intelligent architectural objects — walls, windows, doors — that plain AutoCAD does not.

    Affiliate program

    Earn 15% on the sales you refer

    Recommend the software you already use — on a website, a blog, a channel or to the people you work with — and earn commission on the sales you send us. It costs nothing to join.

    Ask to join →
    15%
    commission on every sale from your affiliate links
    45 days
    cookie window from the first click
    Monthly
    payment through oneNetworkDirect, with real-time reporting, once you pass the minimum (generally $25)
    $20–$1,495
    product price range; the average order is about $125
    Contact

    Talk to the people who make it

    Head office

    IMSI Design, LLC

    384 Bel Marin Keys Blvd. #150
    Novato, CA 94949
    USA

    Monday to Friday, 8:00 AM to 4:30 PM CST

    Sales

    Pricing, licensing, enterprise, volume and reseller enquiries.

    1.800.833.8082sales@imsidesign.com

    Customer service & support

    Orders, downloads, activation and how-to questions.

    1.415.483.8000customersupport@imsidesign.comsupport@imsidesign.com

    Press & partnerships

    Press materials, product information and evaluation software.

    pr@imsidesign.comAll contact options →

    Thirty years in, still the same test.

    Download a trial and see whether it does your work. That is the only review that counts.
    Try any product free

    Founded in 1983, IMSI Design is a leader in feature-rich, yet affordable, general-purpose CAD (Computer Aided Design) and home design desktop software.