Best Diagramming Software in 2026
Updated
45ranked
3free plans on this page
€0.17/molowest paid tier
9 Oct 2026last checked
3 of the 20 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 26 | TextografoWeb | Two bars | — | 1 of 6 | Free | 6.2 | |
| 27 | D2Web · Windows · Mac · Linux · Self-hosted · API | Two bars | — | — | 4 of 6 | — | 5.6 |
| 28 | ClickChartsWindows · Mac · Android | Two bars | — | — | 3 of 6 | — | 5.5 |
| 29 | ARISWeb · Windows · Self-hosted · API | One bar | — | — | 2 of 6 | — | 5.4 |
| 30 | Flowdia DiagramsWindows · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.4 |
| 31 | DiaWindows · Mac · Linux | Two bars | — | 3 of 6 | Free | 5.3 | |
| 32 | Sparx Enterprise ArchitectWindows · Mac · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 5.3 | |
| 33 | DiagramoWeb · Windows | No signal | — | — | 2 of 6 | — | 5.2 |
| 34 | GraphvizWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.2 |
| 35 | SmartDrawWeb · Windows · Mac · Linux | Two bars | — | — | 4 of 6 | — | 5.2 |
| 36 | ThinkComposerWindows | No signal | — | — | 1 of 6 | — | 5.2 |
| 37 | GluuWeb · Android · iPhone · API | Two bars | — | — | 3 of 6 | €0.17/mo | 5.1 |
| 38 | MyDrawWeb · Windows · Mac | Two bars | — | — | 3 of 6 | $3/mo | 5.1 |
| 39 | StarUMLWindows · Mac · Linux · Extension | Two bars | — | — | 3 of 6 | $129/mo | 5.1 |
| 40 | ConceptDraw OfficeWindows · Mac | One bar | — | — | 2 of 6 | $499/mo | 5.0 |
| 41 | MermaidWeb | No signal | — | — | 1 of 6 | — | 5.0 |
| 42 | ConceptDraw MINDMAPWindows · Mac | One bar | — | — | 2 of 6 | $199/mo | 4.9 |
| 43 | OmniGraffleMac · iPhone | One bar | — | — | 2 of 6 | — | 4.9 |
| 44 | SAP Signavio Process ModelerWeb | No signal | — | — | 1 of 6 | — | 4.8 |
| 45 | ConceptDraw DIAGRAMNo platforms listed | No signal | — | — | 0 of 6 | $199/mo | 4.7 |
Compare all 20 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Real-time collaboration | Diagram types |
|---|---|---|---|---|---|---|---|---|
| 26 | Textografo | 6.2 | Free plan | Free | Yes | — | Yes | flowcharts, mind maps, decision trees, organizational charts, sitemaps, cross-functional flowcharts |
| 27 | D2 | 5.6 | No | — | Yes | — | — | software architecture diagrams; UML class diagrams; sequence diagrams |
| 28 | ClickCharts | 5.5 | No | — | Yes | — | — | Block, BPMN, brainstorming, data flow, electrical, ER, family tree, fishbone, flowchart, mind map, network, organizational, process flow, UML class, Venn, VSM, graph |
| 29 | ARIS | 5.4 | No | — | — | — | — | — |
| 30 | Flowdia Diagrams | 5.4 | No | — | — | — | — | Flowchart, swimlane, mind map, BPMN, network, Cisco network, rack, server layout, AWS architecture, Azure architecture, UML class, UML activity, UML use case, UML sequence, business process, process flow, chevron |
| 31 | Dia | 5.3 | Free plan | Free | Yes | — | — | Entity-relationship diagrams; UML diagrams; flowcharts; network diagrams |
| 32 | Sparx Enterprise Architect | 5.3 | Free plan | Free | Yes | — | Yes | UML Use Case, Activity, State, Interaction Overview, Sequence, Communication, Package, Class, Object, Composite, Component, Deployment; BPMN; SysML |
| 33 | Diagramo | 5.2 | No | — | Yes | — | — | flowcharts, diagrams, graphs |
| 34 | Graphviz | 5.2 | No | — | — | — | — | graph diagrams; network diagrams; hierarchical diagrams |
| 35 | SmartDraw | 5.2 | No | — | No | — | Yes | floor plans, site plans, building layouts, evacuation plans, accident reconstructions, crime scenes, circuit diagrams, wiring diagrams, electrical plans, planograms, flowcharts, organizational charts, network diagrams, UML diagrams, ERDs, data flow diagrams, timelines, mind maps, Gantt charts, cause-and-effect diagrams |
| 36 | ThinkComposer | 5.2 | No | — | Yes | — | — | concept maps, mind maps, flowcharts, use case diagrams, class diagrams, sequence diagrams, timelines, data models, organizational charts, business models, genealogy trees |
| 37 | Gluu | 5.1 | No | €0.17/mo | No | — | — | process maps, BPMN 2.0 diagrams, landscape maps, process houses, value chains, SIPOC diagrams, value stream maps, customer journey maps, swimlane diagrams |
| 38 | MyDraw | 5.1 | No | $3/mo | No | — | — | flowcharts, organizational charts, family tree diagrams, cross-functional diagrams, cause-and-effect diagrams, data flow diagrams, mind maps, SDL diagrams, Venn diagrams, workflow diagrams |
| 39 | StarUML | 5.1 | No | $129/mo | No | — | Yes | UML 2, entity-relationship, data flow, flowchart, mindmap, C4, SysML, BPMN, UI wireframe, AWS architecture, GCP architecture, Azure architecture |
| 40 | ConceptDraw Office | 5.0 | No | $499/mo | No | — | — | Business process diagrams, process flowcharts, UML diagrams, technical drawings, infographics |
| 41 | Mermaid | 5.0 | No | — | — | — | — | flowchart, sequence diagram, class diagram, state diagram, Gantt chart, timeline, mindmap, Git graph, use case diagram, event modeling diagram |
| 42 | ConceptDraw MINDMAP | 4.9 | No | $199/mo | No | — | — | flowcharts, block diagrams, process diagrams, UML diagrams, organizational charts, network diagrams, rack diagrams, cloud service architecture diagrams, technical schematics, building plans, floor plans, dashboards, infographics, presentations |
| 43 | OmniGraffle | 4.9 | No | — | No | — | — | family trees, flow charts, org charts, layouts, directed graphs, nondirected graphs |
| 44 | SAP Signavio Process Modeler | 4.8 | No | — | No | — | — | BPMN 2.0; value chains; DMN |
| 45 | ConceptDraw DIAGRAM | 4.7 | No | $199/mo | No | — | — | flowcharts, block diagrams, process diagrams, UML diagrams, organizational charts, network diagrams, rack diagrams, cloud service architecture diagrams, technical schematics, building plans, floor plans, dashboards, infographics, presentations |
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