Venn & UpSet by SmartVisuals
by SmartVisuals.io
Honest Venn/Euler and UpSet for survey multi-select and customer overlap, with free % of base
Set overlap that tells the truth. See how many people or customers sit in each combination of answers, products or segments, and what share of everyone that is. Up to three sets draw an area-proportional Venn/Euler diagram, four or five a classic Venn, and more an UpSet matrix. Built for multi-select survey questions ("which of these brands do you use?"), customer and product overlap ("who buys A and B?"), feature adoption and any membership data.
Free tier, made for real use:
- Areas follow your data. Two sets are always exact; for three, ellipses of the same areas step in when circles cannot fit. A badge says how close the areas are, labels always show the true counts, and any region that cannot be drawn is listed with its count.
- A clean look: every overlap has its own clear colour, four drawing styles (Soft, Solid, Outline, Glow), focus on hover, and shapes that animate to new sizes when you filter.
- Classic Venn for four or five sets, every combination drawn and marked "not to scale".
- UpSet matrix for up to 30 sets: intersection bars, set-size bars, sort by size or degree, filter by size and degree, linear or log scale, and a reference line (average, median or constant).
- Data labels (count, % of base or both), gridlines, axis labels, data point markers (the UpSet member dots), a legend with position, title, values and font, and annotations pinned to any combination.
- Exclusive ("exactly these sets") or inclusive ("at least these sets") counts, always labelled. Counts and % of base; the base includes everyone who picked "None of these".
- Four data shapes, no reshaping: long (ID + answer), delimited ("A;B;C" as Microsoft Forms exports), wide (one 0/1 or Yes/No field per set) or pre-aggregated (combination + count).
- Set query: any of / all of / exactly / none of a chosen list, highlighted and counted.
- Highlight and cross-filter by region, bar, set or legend item. Tooltips, report page tooltips, extra tooltip fields, right-click menu.
- Four themes with their own personalities or your report theme colours, a colour per set or conditional formatting (fx) from a rule or a colour field, dynamic format strings, transparent background, every element adjustable. Responsive to its size.
- Localized in 20 languages: English, Chinese (Simplified and Traditional), Czech, Danish, Dutch, French, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil and Portugal), Slovak, Spanish, Swedish and Turkish.
Accessibility (free, never paywalled): full keyboard navigation with a visible focus outline (one tab stop; arrows, Home and End move, Enter or Space selects, Ctrl+Enter adds, Escape clears, the context-menu key opens the menu). Screen readers announce each region, bar or set with its count and % of base. Windows high contrast is followed, text keeps 4.5:1 contrast on every region in every theme, significance is marked with arrows, never by colour alone, and animation follows the system's reduce-motion setting or can be switched off. The Accessibility card sets the focus outline and a minimum text size.
Premium: Overlap intelligence (per-user licence, first month free):
- Survey weights, with the Kish effective base printed next to N.
- Confidence intervals (Wilson or Wald) on every share.
- Significance of overlaps: deviation from independence, lift and phi with tests.
- Duplication matrix: % also, lift or Jaccard for every pair of sets.
- TURF reach: the best portfolio of 1 to 15 items, with incremental reach and frequency.
- Compare waves or segments: small multiples, or clustered (grouped) bars with a colour per group and significance letters.
- Size overlaps by a value field, e.g. the revenue of customers who buy A and B.
The statistics and the geometry are validated against scipy, statsmodels and shapely, and the methodology is published. Premium features preview free in edit mode. Readers without a licence always see the free chart, never a blocked or watermarked visual. No external calls, no data leaves your report.
New in 1.1.0.0: ellipses, Venn for four and five sets, clean overlap colours and four styles, hover focus and animation, legend, fx set colours, reference line, annotations, dynamic format strings.
Part of the SmartVisuals family. Documentation: https://smartvisuals.io/visuals/venn-upset - Support: https://smartvisuals.io/support#venn-upset - hello@smartvisuals.io - Release notes: https://smartvisuals.io/changelog