Native · Mac & Windows · Statistics & data visualization
Stratum brings descriptive statistics, 30+ publication-quality charts, full inferential testing, nine SPC control charts with process capability, and machine learning into one fast, native app — and it opens your .sav and .dta files directly. No notebooks, no scripting, no cloud.
Free 10-day trial · no credit card. Buy once — no subscription.
Requires macOS 14 (Sonoma) or later, or Windows 10/11 (64-bit) · Built to handle datasets up to ~5 million rows. · All platforms & install help →
The power of a JMP or Minitab, without the subscription, the cloud, or the learning curve.
A one-time purchase — no subscription, ever. Start with a free 10-day trial.
100% offline. Your files, datasets, and results never leave your computer.
Swift on Mac, a native build on Windows — not Electron. Instant launch, up to ~5M rows.
Try every feature free for 10 days — no credit card, and no account to create.
From first import to final PDF, Stratum keeps you in flow — point, click, and read the result. No glue code between tools.
Drop in CSV, TSV, Excel, fixed-width ASCII, SPSS .sav or Stata .dta files. Stratum auto-detects delimiters, infers numeric vs. categorical columns and keeps variable and value labels, then opens straight into a fast, native data grid.
Re-editable formula columns with 114 functions, a dockable filter inspector, and join / stack / aggregate / dedup / sample — all without leaving the app.
Histograms, box & violin plots, scatter, treemaps, contour, dumbbell, Pareto, mosaic and more — each with live controls, zoom on every continuous axis, linked selection across every chart, and one-click PNG / PDF export.
ANOVA with Type I/II/III sums of squares and effect sizes, MANOVA, Pearson / Spearman / Kendall correlation, two-sample and contingency tests, plus regression with full diagnostics, prediction intervals and best-subsets selection — parametric and nonparametric throughout.
I-MR, X-bar R/S, p/np, c/u, CUSUM and EWMA charts with all eight Nelson rules and Phase I/II staging, plus process capability — Cp, Cpk, Cpm, Pp, Ppk, PPM and Z-bench with confidence intervals.
PCA with KMO and Bartlett’s test, k-means & hierarchical clustering, cross-validated decision trees, random forests with out-of-bag error and boosted trees with early stopping — with partial-dependence plots and held-out validation.
The things that matter when your data — and your audience — grow.
A virtualized grid and lazy filtering keep Stratum responsive on datasets up to ~5 million rows.
Scale the entire interface text size for readability, with independent controls for the data grid and reports.
The native .stratum format saves data, analyses, filters and styling together — reopen exactly where you left off.
From a fast data grid to publication-ready charts, reports, control charts and models — here's what the work looks like.
The Stratum Tutorial walks through every major capability with a real dataset, the exact clicks to reproduce it, and the statistics behind the result. The blog adds fresh how-tos, worked examples, and statistics explainers — new posts every week.
Open to everyone — no download required. Look something up, run a quick calculation, or grab a dataset to practice on.
Plain-language definitions, formulas, and how-to-read guidance for the terms you actually use.
P-value, sample size, and effect size — exact answers, right in your browser.
Clean, documented, openly-licensed CSVs to learn and demo with.
Stratum