Best Diagramming Software in 2026
Updated
45ranked
5free plans on this page
$15/molowest paid tier
9 Oct 2026last checked
Input list Diagramming Software 20 channels on this page · 55 of 160 spec lines stated by the makers
Ch Tool Free planPaid fromReal-time collaborationDiagram typesDesktop appsOffline editingImport/export formatsEditor seat limit Spec sheet Score
26 D2 Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typessoftware architecture diagrams; UML class diagrams; sequence diagramsDesktop appsnot statedOffline editingYesImport/export formatsD2 (.d2); SVG; PNG; PDF; PPTX; GIF; ASCIIEditor seat limitnot stated 4/8spec lines stated 6.8
27 Eraser Free planYesPaid from15/user/moReal-time collaborationYesDiagram typesFlow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams, BPMN diagramsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 4/8spec lines stated 6.8
28 Pencil Project Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesGUI mockups, wireframes, flowcharts, desktop UI, web UI, Android UI, iOS UIDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 2/8spec lines stated 6.8
29 Vexlio Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesflowcharts, UML diagrams, block diagrams, state machine diagrams, software architecture diagrams, math diagramsDesktop appsnot statedOffline editingnot statedImport/export formatsPNG, JPG, JPEG, PDF, SVGEditor seat limitnot stated 3/8spec lines stated 6.8
30 ConceptDraw Office Free planNoPaid fromnot statedReal-time collaborationnot statedDiagram typesBusiness process diagrams, process flowcharts, UML diagrams, technical drawings, infographicsDesktop appsYesOffline editingnot statedImport/export formatsVSD, VDX, VSDX, VSS, VSSX, PNG, JPG, BMP, GIF, TIFF, EPS, PDF, HTML, SVG, PowerPointEditor seat limit1 seats 5/8spec lines stated 6.7
31 ClickCharts Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesBlock, BPMN, brainstorming, data flow, electrical, ER, family tree, fishbone, flowchart, mind map, network, organizational, process flow, UML class, Venn, VSM, graphDesktop appsYesOffline editingnot statedImport/export formatsCCD, PSD, TGA, GIF, JPG/JPEG, BMP, PCX, PNM/PBM/PGM/PPM, PNG, PGF, PDF, RAS, TIF/TIFF, WBMPEditor seat limitnot stated 4/8spec lines stated 6.6
32 ARIS Free plannot statedPaid fromnot statedReal-time collaborationnot statedDiagram typesnot statedDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 0/8spec lines stated 6.5
33 Textografo Free planYesPaid fromnot statedReal-time collaborationYesDiagram typesflowcharts, mind maps, decision trees, organizational charts, sitemaps, cross-functional flowchartsDesktop appsnot statedOffline editingnot statedImport/export formatsPNG, PDFEditor seat limitnot stated 4/8spec lines stated 6.4
34 Sparx Enterprise Architect Free planYesPaid fromnot statedReal-time collaborationYesDiagram typesUML Use Case, Activity, State, Interaction Overview, Sequence, Communication, Package, Class, Object, Composite, Component, Deployment; BPMN; SysMLDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 3/8spec lines stated 6.3
35 Diagramming Tool Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typescloud architecture, flowcharts, sequence diagrams, entity relationship diagrams, UML class diagrams, C4 container diagrams, Kubernetes topologies, network diagrams, state machines, Gantt charts, Kanban boards, mindmaps, org charts, sitemaps, Sankey flows, XY charts, radar charts, treemaps, fishbone diagramsDesktop appsnot statedOffline editingnot statedImport/export formatsPNG, SVG, .diagram.jsonEditor seat limitnot stated 3/8spec lines stated 6.2
36 Flowdia Diagrams Free plannot statedPaid fromnot statedReal-time collaborationnot statedDiagram typesFlowchart, 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, chevronDesktop appsYesOffline editingnot statedImport/export formatsImport: PNG, JPG; export: PNG, JPG, PDF, SVGEditor seat limitnot stated 3/8spec lines stated 6.2
37 ConceptDraw MINDMAP Free planNoPaid fromnot statedReal-time collaborationnot statedDiagram typesflowcharts, block diagrams, process diagrams, UML diagrams, organizational charts, network diagrams, rack diagrams, cloud service architecture diagrams, technical schematics, building plans, floor plans, dashboards, infographics, presentationsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 2/8spec lines stated 6.1
38 OmniGraffle Free planNoPaid fromnot statedReal-time collaborationnot statedDiagram typesfamily trees, flow charts, org charts, layouts, directed graphs, nondirected graphsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 2/8spec lines stated 6.0
39 Dia Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesEntity-relationship diagrams; UML diagrams; flowcharts; network diagramsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 2/8spec lines stated 5.9
40 Diagramo Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesflowcharts, diagrams, graphsDesktop appsnot statedOffline editingnot statedImport/export formatsPNG, SVG, GIF, JPEGEditor seat limitnot stated 3/8spec lines stated 5.9
41 ThinkComposer Free planYesPaid fromnot statedReal-time collaborationnot statedDiagram typesconcept maps, mind maps, flowcharts, use case diagrams, class diagrams, sequence diagrams, timelines, data models, organizational charts, business models, genealogy treesDesktop appsYesOffline editingnot statedImport/export formatsTSV, CSV, PDF, XPS, HTML, XML, TXTEditor seat limitnot stated 4/8spec lines stated 5.8
42 Graphviz Free plannot statedPaid fromnot statedReal-time collaborationnot statedDiagram typesgraph diagrams; network diagrams; hierarchical diagramsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 1/8spec lines stated 5.7
43 SAP Signavio Process Modeler Free planNoPaid fromnot statedReal-time collaborationnot statedDiagram typesBPMN 2.0; value chains; DMNDesktop appsnot statedOffline editingnot statedImport/export formatsBPMN 2.0 XML; SAP Signavio XML; PNGEditor seat limitnot stated 3/8spec lines stated 5.7
44 ConceptDraw DIAGRAM Free planNoPaid fromnot statedReal-time collaborationnot statedDiagram typesflowcharts, block diagrams, process diagrams, UML diagrams, organizational charts, network diagrams, rack diagrams, cloud service architecture diagrams, technical schematics, building plans, floor plans, dashboards, infographics, presentationsDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 2/8spec lines stated 5.6
45 Mermaid Free plannot statedPaid fromnot statedReal-time collaborationnot statedDiagram typesflowchart, sequence diagram, class diagram, state diagram, Gantt chart, timeline, mindmap, Git graph, use case diagram, event modeling diagramDesktop appsnot statedOffline editingnot statedImport/export formatsnot statedEditor seat limitnot stated 1/8spec lines stated 5.4
Compare all 20 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Real-time collaboration | Diagram types |
|---|---|---|---|---|---|---|---|---|
| 26 | D2 | 6.8 | No | — | Yes | — | — | software architecture diagrams; UML class diagrams; sequence diagrams |
| 27 | Eraser | 6.8 | Free plan | $15/mo | Yes | 15 /user/mo | Yes | Flow charts, entity-relationship diagrams, cloud architecture diagrams, sequence diagrams, BPMN diagrams |
| 28 | Pencil Project | 6.8 | Free plan | Free | Yes | — | — | GUI mockups, wireframes, flowcharts, desktop UI, web UI, Android UI, iOS UI |
| 29 | Vexlio | 6.8 | Free plan | — | Yes | — | — | flowcharts, UML diagrams, block diagrams, state machine diagrams, software architecture diagrams, math diagrams |
| 30 | ConceptDraw Office | 6.7 | No | $499/mo | No | — | — | Business process diagrams, process flowcharts, UML diagrams, technical drawings, infographics |
| 31 | ClickCharts | 6.6 | No | — | Yes | — | — | Block, BPMN, brainstorming, data flow, electrical, ER, family tree, fishbone, flowchart, mind map, network, organizational, process flow, UML class, Venn, VSM, graph |
| 32 | ARIS | 6.5 | No | — | — | — | — | — |
| 33 | Textografo | 6.4 | Free plan | Free | Yes | — | Yes | flowcharts, mind maps, decision trees, organizational charts, sitemaps, cross-functional flowcharts |
| 34 | Sparx Enterprise Architect | 6.3 | No | — | Yes | — | Yes | UML Use Case, Activity, State, Interaction Overview, Sequence, Communication, Package, Class, Object, Composite, Component, Deployment; BPMN; SysML |
| 35 | Diagramming Tool | 6.2 | Free plan | Free | Yes | — | — | cloud architecture, flowcharts, sequence diagrams, entity relationship diagrams, UML class diagrams, C4 container diagrams, Kubernetes topologies, network diagrams, state machines, Gantt charts, Kanban boards, mindmaps, org charts, sitemaps, Sankey flows, XY charts, radar charts, treemaps, fishbone diagrams |
| 36 | Flowdia Diagrams | 6.2 | 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 |
| 37 | ConceptDraw MINDMAP | 6.1 | 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 |
| 38 | OmniGraffle | 6.0 | No | — | No | — | — | family trees, flow charts, org charts, layouts, directed graphs, nondirected graphs |
| 39 | Dia | 5.9 | No | — | Yes | — | — | Entity-relationship diagrams; UML diagrams; flowcharts; network diagrams |
| 40 | Diagramo | 5.9 | No | — | Yes | — | — | flowcharts, diagrams, graphs |
| 41 | ThinkComposer | 5.8 | No | — | Yes | — | — | concept maps, mind maps, flowcharts, use case diagrams, class diagrams, sequence diagrams, timelines, data models, organizational charts, business models, genealogy trees |
| 42 | Graphviz | 5.7 | No | — | — | — | — | graph diagrams; network diagrams; hierarchical diagrams |
| 43 | SAP Signavio Process Modeler | 5.7 | No | — | No | — | — | BPMN 2.0; value chains; DMN |
| 44 | ConceptDraw DIAGRAM | 5.6 | 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 |
| 45 | Mermaid | 5.4 | No | — | — | — | — | flowchart, sequence diagram, class diagram, state diagram, Gantt chart, timeline, mindmap, Git graph, use case diagram, event modeling diagram |
More in Design, Video & Audio
All design, video & audio listsVideo Editing Software 161Photo Editing Software 160Digital Asset Management Software 151Graphic Design Software 1503D modeling software 149Video Downloaders 137Live Streaming Software 136Screen Recording Software 133Audio Editing Software 130Animation Software 108Image Upscaling Software 100Data Visualization Software 98