Stratum

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Stratum is a native statistics and data-visualization application for Mac and Windows, built for analysts who want serious statistical tools in a fast desktop app without notebooks, scripting, or the cloud. It imports CSV and Excel files through a guided wizard and works comfortably with datasets of up to 5 million rows. A formula engine with 100+ functions handles filtering, sorting, and reshaping, while 30+ chart types cover everything from histograms and box plots to control charts, treemaps, and contour plots. Statistical methods include descriptive statistics, correlation, regression, ANOVA and MANOVA, contingency tables, and PCA, alongside machine learning such as decision trees, random forests, boosted trees, and clustering. Every analysis exports to PDF, image, or clipboard. Stratum is available in 10 languages and is a one-time purchase with no subscription. A free trial is available.