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Feature checklists make every tool look equivalent. This table leads with the three things that actually differ — what it costs you before it works, whether your files leave your device, and where the free version stops.
| Flourishflourish.studio | Datawrapperdatawrapper.de | Observableobservablehq.com | RAWGraphsrawgraphs.io | |
|---|---|---|---|---|
| What it does | Animated and scrollable data stories from a spreadsheet of numbers | Turns a pasted table into a publication-quality chart in four steps | Reactive JavaScript notebooks for exploring data and building charts | Makes the chart types nothing else offers — alluvial, beeswarm, treemap |
| What it costs you | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | Free tierA genuinely usable free tier with paid plans for volume or team features. | No sign-upWorks the moment the page loads. No account, no email, no trial. |
| Your files | Runs on their server | Runs on their server | Runs on their server | Runs on your device |
| Where it stops | Free projects carry Flourish branding and are meant to be published publicly; private work needs a paid plan. | Free charts are public, keep the Datawrapper credit, and export as PNG only — SVG and PDF need a paid plan. | The reactive execution model is not Jupyter and will surprise you; creating notebooks requires an account. | Output is a static SVG or PNG — there is no interactive or embeddable version. |
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| Category | Data, Tables & Charts | Data, Tables & Charts | Data, Tables & Charts | Data, Tables & Charts |
| Last checked | 2026-07-29 | 2026-07-29 | 2026-07-29 | 2026-07-29 |
| Open the site | Open | Open | Open | Open |
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