Alternatives

Products that do what Gleek diagram maker – UML class, Sequence, ER diagrams, Flowcharts does

1. 1
   Gleek▲314

   Free online diagramming tool for developers

   2021

2. 2DA
   Diagram as code tool with draggable customizations▲266

   In the past I've used declarative diagram generation tools like Mermaid.js a lot for quickly drawing up things but for presentations or deliverables I find that I have to then move the generated diagrams over to a tool like Lucidchart which allows full control of the organization and customization. Therefore I am now working on this to combine the benefits of both into just one tool which can do both functions. The project is certainly in the early stages but if you find yourself making architecture diagrams I'd love to hear your thoughts on the idea or even a Github issue for a feature…

   Oct 2025 · github.com

3. 3AD
   A Diagram Editor for JupyterLab▲50

   2018 · blog.jupyter.org

4. 4SA
   Swimlanes – A web app for creating sequence diagrams with Markdown▲52

   2017 · swimlanes.io

5. 5AJ
   A JavaScript Tool for Database Diagramming▲75

   2016 · github.com

6. 6DG
   Dbdot – Golang tool to help generate Postgres schema diagrams▲119

   2019 · github.com

7. 7TA
   Terrastruct – A Diagramming Tool for Systems▲187

   2020 · terrastruct.com

8. 8CC
   Cloudcraft – Create AWS diagrams▲281

   2015 · cloudcraft.co

9. 9FA
   Flowy – A minimal JavaScript library to create flowcharts▲52

   2019 · github.com

10. 10CM
    Chart Mage – A text based UML diagram tool with smart autocompletion▲6

    2016 · chartmage.com

11. 11PG
    Programmatically Generate Diagrams for GitHub Readmes▲220

    2019 · github.com

12. 12SA
    Skov – A visual programming environment▲142

    2016 · skov.software

13. 13CD
    CloudSkew – Draw AWS, Azure, GCP, K8s architecture diagrams▲131

    2020 · cloudskew.com

14. 14QS
    quickly share UML diagrams▲45

    2013 · app.umlbin.com

15. 15SH
    ShakyDraw – Hand-drawn block diagrams from plain text▲140

    2017 · shakydraw.com

16. 16AC
    Arcentry – Create Interactive Cloud Diagrams▲75

    2018 · arcentry.com

17. 17
    Venngage Diagram Maker▲132

    The easy way to make stunning diagrams

    2021

18. 18GI
    GoJS - Interactive Canvas Diagramming Library▲48

    2013 · gojs.net

19. 19
    Quick Diagram▲121

    A tool for generating diagrams and flowcharts from text.

    2020

20. 20RD
    RxJS Diagrams – A React library for visualising Rx operators▲37

    2017 · rxjs-diagrams.com

21. 21CC
    Codemap – Codebase Visualizer for JavaScript, TypeScript, and Python▲84

    2020 · codemap.app

22. 22II
    Ilograph – interactive architecture diagrams as code▲92

    2020 · app.ilograph.com

23. 23ES
    Excalidraw – Sketch Hand-Drawn Like Diagrams▲30

    2020 · github.com

24. 24UM
    UML model and code examples of GoF patterns in Crystal▲35

    2021 · github.com

Ranked by how close each launch is in meaning, then by votes. Refine with a description →