Freedom251 › Diagramming Software
Diagramo
What Diagramo is
Diagramo is a free, open-source online editor for flowcharts, diagrams, and graphs. It uses HTML5 and does not require Flash, Java, or other plugins. Diagrams can be shared with teammates or published through permalinks, and listed export formats include PNG, SVG, GIF, and JPEG. The source code can be adapted for local needs. For server hosting, the LAMP installer is described as an all-platform web installer for Apache and PHP servers, allowing diagrams to be stored and shared from a server. A Windows all-in-one package is also described for local deployment or a Windows-based server. The home page advertises lifetime support and storage. A commercial license is priced on request and covers one server, unlimited developers, a non-expiring license, and one year of support and bug fixes. The maker says this option may suit users seeking code support or enhancements, or those who do not want the open-source version. Scriptoid is identified as the copyright holder.
Who it suits
Diagramo suits people creating and sharing flowcharts, diagrams, or graphs through a web interface. It also fits teams needing self-hosted deployment on Apache/PHP or Windows systems.
What it does well
- Free and open-source editor
- Exports PNG, SVG, GIF, and JPEG
- Permalinks enable diagram sharing
- HTML5 requires no listed plugins
- Source code can be customized
What to know first
- Commercial license is priced on request
- Commercial support and bug fixes last one year
- Server installer requires Apache and PHP
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Commercial license | single server · unlimited developers · non-expiring license · 1 year of support and bug fixes | $999 |
As diagramo.com lists them, read 11 Oct 2026. The maker's own page has the final word.
Verdict
Diagramo offers browser-based diagram creation, sharing, exports, and self-hosting options. The free open-source edition is distinct from the paid commercial license, which adds specified support and licensing terms.
Facts from Diagramo's own pages
- Collaboration
- Users can share diagrams with teammates and share diagrams with the world using permalinks. · diagramo.com, 11 Oct 2026
- Commercial use
- The maker says a commercial license may suit users who want code support, extra enhancements, or do not want to use the open-source version. · diagramo.com, 11 Oct 2026
- Customization
- The maker says users can take the source code and tune it to their needs. · diagramo.com, 11 Oct 2026
- Deployment
- The LAMP installer is described as an all-platform web installer for servers with Apache and PHP, for keeping and sharing diagrams on a server. · diagramo.com, 11 Oct 2026
- Diagram types
- flowcharts,diagrams,graphs · diagramo.com, 20 Sept 2026
- Exports
- The features page lists SVG, GIF, and JPEG export; the home page also lists PNG export. · diagramo.com, 11 Oct 2026
- Free plan
- Yes · diagramo.com, 20 Sept 2026
- Free version
- The maker describes Diagramo as free and open source. · diagramo.com, 11 Oct 2026
- Import/export formats
- PNG,SVG,GIF,JPEG · diagramo.com, 20 Sept 2026
- Maker
- The product pages identify Scriptoid as Diagramo’s copyright holder. · diagramo.com, 11 Oct 2026
- Purpose
- Diagramo is an online flowchart and diagram editor. · diagramo.com, 11 Oct 2026
- Support
- The home page advertises lifetime support and storage, while the commercial license includes one year of support and bug fixes. · diagramo.com, 11 Oct 2026
- Technology
- The maker says Diagramo uses HTML5 and does not require Flash, Java, or other plugins. · diagramo.com, 11 Oct 2026
- Windows package
- A Windows all-in-one package is described for local computer deployment or a Windows-based server. · diagramo.com, 11 Oct 2026
Where Diagramo stands on Freedom251
- Diagramming Software#12 of 44
- Diagramming tools#26 of 46