Proprietary Software
Proprietary software is software whose source code, data formats, and implementation details are controlled by the vendor and not available for inspection or modification by the customer. In PLM, proprietary platforms (PTC Windchill, Siemens Teamcenter, Dassault 3DEXPERIENCE) store product data in internal formats, implement business logic in vendor-specific scripting environments, and require vendor-supplied or vendor-approved tools for migration and integration. Proprietary PLM dominates the market; understanding its lock-in mechanisms is essential for realistic long-term planning.
Why it matters
Proprietary PLM platforms accumulate lock-in silently over years of customization and data growth. The costs appear suddenly at renewal negotiation or migration time—when switching costs are so high that the incumbent vendor effectively controls pricing. Understanding lock-in mechanisms before selection is the only time you can negotiate effectively.
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Cite this definition
Finocchiaro, Michael. “Proprietary Software.” DemystifyingPLM PLM Glossary, 2026, https://www.demystifyingplm.com/glossary/proprietary-software