who we are


Seamly began as one woman’s quest to revolutionize the fashion industry.

Frustrated by ill-fitting rack clothing found in department stores, founder Susan Spencer immersed herself in identifying the source of fashion’s poor-fit problem. A systems analyst by trade, Susan began by doing what she does best: analyzing data. She studied over 150 pattern-making software programs, each yielding poor outcomes. It was there she discovered the root of the industry’s issue: all the pattern-making software programs adopted by the industry were developed based on Victorian-era design measurements. No program offered the ability to tailor measurements to allow designers to efficiently scale their design patterns to meet the fit of today’s population.

Seamly Systems | Founder + CEO | Sue Spencer | Pattern-Making Software
Seamly | Pattern-Making Software | Seamly opening screeen on laptop

The deeper Susan dug into the industry, the more impassioned she became to change it.

This passion led to the development of Seamly 2D: an open-source fashion design program that allows fashion design agencies of all sizes across the globe to profitably create their design patterns quickly and easily. To date, over 30,000 designers in over 35 different countries have transformed the way they do business as a result of this groundbreaking technology.

digital design:

Seamly’s Next Evolution

Today, Seamly is enabling the Fashion Industry’s digital transformation to the new business model to significantly increase profits and reduce waste with our agile, collaborative design and simulation software for physical and digital fashion.

Learn More

Seamly is passionate about simplifying the pattern-making process for fashion design agencies of all sizes. Click below to learn more about who we serve and how our open-source design program works.

Who We ServeOur Software

Seamly is an open-source fashion design software that allows fashion design agencies of all sizes to create patterns quickly and easily.