about Us


Karl Lange – SPI Founder and Industry Pioneer

A Legacy of Excellence

For more than four decades, SPI has been internationally recognized as the preferred partner in the development of software products, created exclusively to serve the management needs of all types of shared-ownership properties. These include timeshare resorts, vacation clubs, condo-hotels, fractional and mixed-use properties, as well as vacation rentals. SPI serves the professionals who service resort owners and guests, helping them optimize revenue and enhance the guest experience. 

Already a successful software entrepreneur, in 1978 Karl Lange attended a timeshare convention at the Miami Beach Convention Center, where he launched SPI Software after contracting to write his first business software system for a timeshare developer. During his professional career of over four decades, Karl’s goal was to serve the exclusive needs of the timeshare industry, creating software systems that would help make it easier for resorts to operate themselves.

As the industry has grown, SPI has remained at the forefront of innovation with incisive functionality, developed over trial and error, learning, adapting, and innovating our software to meet the constantly changing needs of the industry we serve.   

Several years prior to his passing in 2019, Karl stepped back from taking a direct management role. From the company’s beginning, he instilled a corporate philosophy of putting people first. Karl left a continuing legacy of pursuing excellence and placing an emphasis on building long-term, deeply committed relationships with his staff and clients. Today, SPI Software holds true to our founder’s vision by continuously seeking to improve and innovate, always delivering value to our customers.