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Dev tools · alternatives · 2026

24 alternatives to PlantUML based collaborative UML editor is now open source

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

PlantUML-based collaborative UML editor is an open-source development tool that enables teams to create and edit UML diagrams together in real time. Designed for software developers and architects who need to visualize… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. PlantUML based collaborative UML editor is now open source launched in 2023; newer entries below may have overtaken it.

  1. 1

    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 →

  2. 2

    Create, collaborate, and share UML diagrams

    2025 · its alternatives →

  3. 3
    Abstract▲837

    Design collaboration without the chaos

    2017 · abstract.com · its alternatives →

  4. 4

    Hello HN, I am building Docmost, an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion. I have been working on it for the past 12 months. This is the first public release (beta). The rich-text editor has support for real-time collaboration, LaTex, inline comments, tables, and callouts to name a few. Features - Collaborative real-time editor - Spaces (Teamspace) - User permissions - Groups - Comments - Page history - Nested pages - Search - File attachments You can find screenshots of the product on the website. Website:…

    2024 · github.com · its alternatives →

  5. 5
    Figma 1.0▲705

    The first interface design tool with real-time collaboration

    2016 · figma.com · its alternatives →

  6. 6

    Create diagrams by describing them in plain text

    2017 · plantuml.com · its alternatives →

  7. 7

    A pleasant note-taking platform in native C++. Contribute to vnotex/vnote development by creating an account on GitHub.

    2018 · github.com · its alternatives →

  8. 8

    Inspired by the design and UI/UX of apps like Notion, and utility of open-source apps like StackEdit, I decided to create a minimalistic, local-only WYSIWYG Markdown editor. Some features worth highlighting: - Monaco editor and Prettier integration for code snippets - Tables (apparently the holy grail of WYSIWYG editing) - Embeds (for CodePen, CodeSandbox and YouTube, most useful for HTML or JSON exports) - Accepts Markdown paste-in, and "exports"/generates HTML, Markdown and JSON outputs - Collaboration (with real-time awareness and initial commenting system, available only when…

    2023 · editor.vrite.io · its alternatives →

  9. 9

    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

    A web-based collaborative LaTeX editor. Contribute to overleaf/overleaf development by creating an account on GitHub.

    2014 · github.com · its alternatives →

  11. 11
    Tabl 1.0▲752

    A multi-player web browser

    2025 · its alternatives →

  12. 12

    Efficient and minimal collaborative code editor, self-hosted, no database required - ekzhang/rustpad

    2021 · github.com · its alternatives →

  13. 13

    Hi HN! I couldn’t find a truly user-friendly PlantUML editor, so I set out to build one. PlantDiagrams lets you describe a diagram in plain English; it generates the PlantUML and renders it instantly. The goal is to shorten the path from idea → diagram without fighting the editor. Tech: - Next.js / Supabase / FLy.io / Vercel Highlights - Natural-language to PlantUML with live preview - Export diagrams (SVG/PNG/TXT) - Organize work with Projects - Share via link; optional comments for review - Sample gallery to open and tweak examples Try it:…

    2025 · plantdiagrams.com · its alternatives →

  14. 14
    Tiptap▲591

    Developer toolkit for building collaborative apps

    2023 · tiptap.dev · its alternatives →

  15. 15
    UMLCN▲8

    Plantuml | umlcn

    2025 · umlcn.com · its alternatives →

  16. 16

    The collaborative interface design tool

    2015 · figma.com · its alternatives →

  17. 17

    The simplest way to visualize ideas, plans & processes

    2020 · creately.com · its alternatives →

  18. 18FA
  19. 19

    Microsoft's cross-platform text editor for developers

    2016 · code.visualstudio.com · its alternatives →

  20. 20

    🧜‍♀️ 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 →

  21. 21

    Take design collaboration to the next level in the cloud

    2019 · sketch.com · its alternatives →

  22. 22

    Collaboration & handoff for UI designers/frontend developers

    2015 · zeplin.io · its alternatives →

  23. 23QS

    2013 · app.umlbin.com · its alternatives →

  24. 24

    Collaborative block-based editor → ready to drop in your app

    2025 · tiptap.dev · its alternatives →

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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 →