RefFIT is software for the analysis of spectroscopic data in material science, used by customers for product and process development, quality control and sorting in industries like manufacturing, semiconductor and photonics and recycling. RefFIT contains an extensive library of scientific models, linked and easily customizable thanks to techniques inspired by machine learning. We provide a complete no-code model-based analysis solution reducing the need for lengthy calibrations in material analysis. With RefFit, complex spectroscopic material analysis becomes easy, fast, more accurate and accessible to all potential users. Our software significantly reduces the time to analyze data and build new models thereby enabling new applications, previously too complex and costly to develop.