Best Diagram Software in 2026
Updated
37 diagram software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
37ranked
0free plans on this page
$199/molowest paid tier
9 Oct 2026last checked
Input list Diagram Software 12 channels on this page · 58 of 96 spec lines stated by the makers
Ch Tool Free planPaid fromDiagram typesReal-time collaborationExport formatsImport formatsDesktop appVersion history Spec sheet Score
26 ConceptDraw MINDMAP Free planNoPaid fromnot 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, presentationsReal-time collaborationnot statedExport formatsPNG, JPG, BMP, GIF, TIFF, EPS, Adobe PDF, HTML, SVG, PowerPoint, VDX, VSDXImport formatsPNG, JPG, BMP, GIF, TIFF, PowerPoint, VDX, VSDX, VSD, VSS, VSSXDesktop appYesVersion historynot stated 5/8spec lines stated 6.2
27 Dia Free planYesPaid fromnot statedDiagram typesEntity-relationship diagrams; UML diagrams; flowcharts; network diagramsReal-time collaborationnot statedExport formatsEPS; SVG; XFIG; WMF; PNGImport formatsDia XML (.dia); Visio XML (.vdx)Desktop appYesVersion historynot stated 5/8spec lines stated 6.1
28 OmniGraffle Free planNoPaid fromnot statedDiagram typesfamily trees, flow charts, org charts, layouts, directed graphs, nondirected graphsReal-time collaborationnot statedExport formatsPNG, JPG, GIF, BMP, TIFF, PDF, EPS, PSD, SVG, OmniOutliner, Visio XMLImport formatsPNG, JPEG, GIF, SVG, PDF, OmniOutliner, Visio VDX, Visio VSDX, Visio VST, Visio VTX, Visio VSS, Visio VSXDesktop appYesVersion historyYes 6/8spec lines stated 6.1
29 Violet UML Editor Free planYesPaid fromnot statedDiagram typesclass, sequence, state, object, use caseReal-time collaborationnot statedExport formatsPNG, JPEGImport formatsnot statedDesktop appYesVersion historynot stated 4/8spec lines stated 6.1
30 Graphviz Free plannot statedPaid fromnot statedDiagram typesgraph diagrams; network diagrams; hierarchical diagramsReal-time collaborationnot statedExport formatsBMP, EPS, GIF, JPEG, JSON, PDF, PNG, PS, SVG, TIFF, WebP, DOT, XDOTImport formatsDOTDesktop appnot statedVersion historynot stated 3/8spec lines stated 5.9
31 Diagram Designer Free planYesPaid fromnot statedDiagram typesflowcharts, UML class diagrams, illustrations, slide showsReal-time collaborationnot statedExport formatsWMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, PCXImport formatsWMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, PCXDesktop appYesVersion historyYes 6/8spec lines stated 5.8
32 Holori Free planYesPaid fromnot statedDiagram typesAWS, Azure, GCP, multi-cloud, Kubernetes, Terraform, cloud architectureReal-time collaborationYesExport formatsPNG, SVG, JPG, PDFImport formatsTerraform filesDesktop appnot statedVersion historyYes 6/8spec lines stated 5.8
33 ConceptDraw DIAGRAM Free planNoPaid fromnot 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, presentationsReal-time collaborationnot statedExport formatsPNG, JPG, BMP, GIF, TIFF, EPS, Adobe PDF, HTML, SVG, PowerPoint, VDX, VSDXImport formatsPNG, JPG, BMP, GIF, TIFF, PowerPoint, VDX, VSDX, VSD, VSS, VSSXDesktop appYesVersion historynot stated 5/8spec lines stated 5.7
34 Mermaid Free plannot statedPaid fromnot statedDiagram typesflowchart, sequence diagram, class diagram, state diagram, Gantt chart, timeline, mindmap, Git graph, use case diagram, event modeling diagramReal-time collaborationnot statedExport formatsPNG, SVG, MarkdownImport formats.mmdDesktop appnot statedVersion historyYes 4/8spec lines stated 5.7
35 SAP Signavio Process Manager Free planNoPaid fromnot statedDiagram typesBPMN 2.0, DMN, EPC, conversation diagrams, choreography diagramsReal-time collaborationnot statedExport formatsPDF, PNG, SVG, JSON, BPMN 2.0 XML, DMN XML, SGX, CSV, Microsoft WordImport formatsBPMN 2.0 XML, DMN XML, Excel, PO filesDesktop appnot statedVersion historyYes 5/8spec lines stated 5.7
36 TaskMap Free planYesPaid fromnot statedDiagram typesprocess mapsReal-time collaborationnot statedExport formatsHTML/website, Excel, PowerPoint, Microsoft ProjectImport formatsExcelDesktop appYesVersion historynot stated 5/8spec lines stated 5.7
37 Cloudcraft Free planYesPaid fromnot statedDiagram typescloud architecture, infrastructure, network, securityReal-time collaborationYesExport formatsnot statedImport formatsnot statedDesktop appnot statedVersion historyYes 4/8spec lines stated 5.6
Compare all 12 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Diagram types | Real-time collaboration |
|---|---|---|---|---|---|---|---|---|
| 26 | ConceptDraw MINDMAP | 6.2 | 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 | — |
| 27 | Dia | 6.1 | No | — | Yes | — | Entity-relationship diagrams; UML diagrams; flowcharts; network diagrams | — |
| 28 | OmniGraffle | 6.1 | No | — | No | — | family trees, flow charts, org charts, layouts, directed graphs, nondirected graphs | — |
| 29 | Violet UML Editor | 6.1 | No | — | Yes | — | class, sequence, state, object, use case | — |
| 30 | Graphviz | 5.9 | No | — | — | — | graph diagrams; network diagrams; hierarchical diagrams | — |
| 31 | Diagram Designer | 5.8 | No | — | Yes | — | flowcharts, UML class diagrams, illustrations, slide shows | — |
| 32 | Holori | 5.8 | No | — | Yes | — | AWS, Azure, GCP, multi-cloud, Kubernetes, Terraform, cloud architecture | Yes |
| 33 | ConceptDraw DIAGRAM | 5.7 | 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 | — |
| 34 | Mermaid | 5.7 | No | — | — | — | flowchart, sequence diagram, class diagram, state diagram, Gantt chart, timeline, mindmap, Git graph, use case diagram, event modeling diagram | — |
| 35 | SAP Signavio Process Manager | 5.7 | No | — | No | — | BPMN 2.0, DMN, EPC, conversation diagrams, choreography diagrams | — |
| 36 | TaskMap | 5.7 | No | — | Yes | — | process maps | — |
| 37 | Cloudcraft | 5.6 | No | — | Yes | — | cloud architecture, infrastructure, network, security | Yes |
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