Life & fun · alternatives · 2026

Quickly share UML diagrams is a web application for creating and sharing UML diagrams. Users can build diagrams directly in the browser and generate shareable links to distribute them with others. The tool is designed… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. quickly share UML diagrams launched in 2013; newer entries below may have overtaken it.

1. 1
   RapidChart.ai▲17

   Hi HN, UML diagrams were meant to standardise system design, but they’ve become outdated — slow to build, hard to change, and rarely used in practice. Most tools feel clunky, and diagrams often go stale fast. I’m building RapidChart, a tool to bring diagramming back to life — fast, flexible, and developer-first. What makes it different: Cursor-style interface for rapid diagram creation Fully customisable and exportable AI-assisted (works with GPT-4, Claude, etc.) 100% free This began as part of my research at Imperial College London, and I’d really value your feedback. Here’s the link:…

   2025 · rapidcharts.ai · its alternatives →

2. 2
   Programmatically Generate Diagrams for GitHub Readmes▲220

   🧜‍♀️ RESTful rendering pipeline for generating sequence and UML diagrams using Mermaid for Markdown docs (Diagrams as a Service) - Schachte/Mermrender

   2019 · github.com · its alternatives →

3. 3
   PlantUML based collaborative UML editor is now open source▲185

   A collaborative UML editor; build with etherpad and plantuml - AlexITC/collabuml

   2023 · github.com · its alternatives →

4. 4
   Quick Diagram▲121

   A tool for generating diagrams and flowcharts from text.

   2020 · quickdiagram.com · its alternatives →

5. 5
   An online collaborative UML editor using PlantUML▲116

   TAKTIK88 menghadirkan perpaduan strategi, gaya bermain, dan nuansa sultan paling prestisius. Temukan informasi menarik, inspirasi taktik, serta pengalaman digital berkelas dalam satu tempat.

   2020 · collabuml.com · its alternatives →

6. 6PT
   Private, text to entity-relationship diagram tool▲262

   Create ER diagrams, SQL schemas, and DBML models. No Signup required, Nothing to install. All diagrams are 100% private, secure and processed locally right in your web browser

   2023 · databasediagram.com · its alternatives →

7. 7
   Diagrams.net▲216

   Open source technology stack for building diagrams

   2021 · drawio.com · its alternatives →

8. 8
   Overflow▲1,139

   The world’s first user flow diagramming tool for designers

   2018 · overflow.io · its alternatives →

9. 9
   Clang-uml – C++ to UML diagram generator based on Clang▲79

   Hi, clang-uml is an open-source C++ to UML diagram generator, driven by YAML configuration files. The main idea behind the project is to easily maintain up-to-date diagrams within a code-base or document legacy code. The configuration file for clang-uml defines the types and contents of each generated diagram. The diagrams can be currently generated in PlantUML and JSON formats. Main features: - class, sequence, package and include diagrams - up to C++17 with support for C++20 concepts - visualization of template specialization relationships - declarative diagram content filtering based on…

   2023 · github.com · its alternatives →

10. 10
    UMLBoard▲82

    A lightweight UML class designer

    2022 · umlboard.com · its alternatives →

11. 11
    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 · its alternatives →

12. 12
    Creately 3.0▲365

    The simplest way to visualize ideas, plans & processes

    2020 · creately.com · its alternatives →

13. 13
    Diagrams by marker.js▲84

    Create and share flowcharts, org charts, mind maps, and more

    2023 · diagrams.markerjs.com · its alternatives →

14. 14
    Vexlio – Create precise, beautiful diagrams▲309

    This is a recent addition to Vexlio which I think the HN crowd may find interesting or useful. TL;DR: easy creation of interactive diagrams, meaning diagrams that have mouse click/hover hooks that you can use to display pop-up content. The end result can be shared with a no-sign-in-required web link. My thought is that this is useful for system docs, onboarding or user guides, presentations, etc. Anything where there is a high-level view that should remain uncluttered + important metadata or details that still need to be available somewhere. You can try it out without signing up for…

    2017 · vexlio.com · its alternatives →

15. 15
    Isoflow▲506

    Create beautiful cloud diagrams in minutes

    2020 · isoflow.io · its alternatives →

16. 16
    Gleek diagram maker – UML class, Sequence, ER diagrams, Flowcharts▲56

    Create diagrams without touching your mouse. Generate informal, class, sequence, state, gantt, user journey or entity-relationship diagrams using only the keyboard.

    2021 · gleek.io · its alternatives →

17. 17
    User Flow by Flowmapp▲370

    A simple tool for creating User Flow Diagrams

    2018 · flowmapp.com · its alternatives →

18. 18
    Turn any workflow diagram into compilable, running and stateful code▲109

    Hi HN folks, I'm a co-creator of the Dapr CNCF project and co-founder of Diagrid. Today we announced a free-to-use web app that takes any form of workflow diagram (UML, BPMN, scribble in your favorite drawing tool or even on paper) and generates code that runs in any IDE and that can be deployed to Kubernetes and other container based systems, based on Dapr's durable execution workflow engine. This essentially allows you to run durable workflows in minutes and leaves out the guesswork for how to structure, code and optimize a code-first workflow app. I'm happy for you to give this a try and…

    2025 · workflows.diagrid.io · its alternatives →

19. 19
    Web Sequence Diagrams▲7

    Generate awesome UML Sequence Diagrams from plain text

    2017 · websequencediagrams.com · its alternatives →

20. 20
    Visual Studio Live Share▲400

    Real-time collaborative development

    2018 · visualstudio.microsoft.com · its alternatives →

21. 21
    The Beginner's Guide to Creating Shareable Infographics▲189

    How to make compelling infographics that get noticed

    2018 · visme.co · its alternatives →

22. 22FE
    Fast, Easy System Diagrams▲59

    2019 · architype.io · its alternatives →

23. 23
    OnUml▲13

    AI-powered UML diagram generator for free

    2025 · onuml.com · its alternatives →

24. 24
    Diagrams for Mac▲196

    A diagram editor for visualizing structures and processes

    2020 · diagrams.app · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →