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Model organizations.
Simply.

The first modern browser-based modeler for the DEMO language. Create, store, and share your organizational models — free, private, no install.

Use for free → Watch intro

No install · Runs in your browser · Made in Belgium 🇧🇪

Watch introduction
Enterprise encryption
Privacy by design
Zero install
Team collaboration
DEMO-native
The problem

DEMO deserved a better tool.

Practitioners have always struggled with aging, heavyweight tooling. YADM changes that.

No modern modeler existed

DEMO practitioners relied on generic diagramming tools not built for the language — models that miss semantics and lack validation.

Desktop-first, share-last

Models lived on hard drives. Sharing meant exporting, attaching, emailing — incompatible with how teams actually work.

Steep setup, steep curve

Complex installation discouraged new practitioners before they drew a single transaction box.

Features

Everything you need to model with DEMO.

DEMO-native modeling

Cooperation Model, Process Structure Diagram, Object Fact Diagram.

Share with one link

Publish a model and share a clean URL. No account needed to view.

Privacy by design

Enterprise encryption from day one. Built in Belgium, fully hosted in Switzerland

Organization accounts

Shared workspaces for your team or institution. Managed access and projects.

Zero install

Open your browser and start. No need to install anything, Works on Mac, Windows, Linux,

Academia & industry

From a university course to an enterprise redesign — YADM scales with you.

Pricing

Start free. Grow when ready.

Free
  • Full DEMO modeling suite
  • Export/import models to JSON / PDF
  • No account
  • Browser-based
Use for free →
Popular
Personal
  • Unlimited models
  • Private & public sharing
  • Enterprise encryption
  • Own user management
  • Priority support
Sign up →
Organization
  • Everything in Personal
  • Team workspace
  • Access management
  • 15 users or more
  • Dedicated onboarding
Sign up →
The team

Meet the team

Dieter
Product Owner
Frederic
Developer
Chadwick
Developer
FAQ

Common questions.

YADM (Yet Another DEMO Modeler) is the first modern, browser-based modeling tool built specifically for the DEMO language — Design and Engineering Methodology for Organizations. Create, store, and share organizational models from any browser, no installation required.
DEMO stands for Design and Engineering Methodology for Organizations. It is an academically grounded methodology used to model the essential construction and operation of organizations through diagrams such as OCD (Object Construction Diagram), PSD (Process Structure Diagram), CMD, and CSD.
Yes. YADM offers a free/guest plan with the full DEMO modeling suite. W ith a paid YADM plan, you support the project and gain online storage for your models. You can publish models publicly or share them via a link. Organizations can invite users under their account.
No. YADM runs entirely in your browser. Nothing to install, no dependencies, no configuration. A name , email if you want an account only. Works on Mac, Windows, Linux, and tablets.
YADM is built with enterprise-grade encryption and privacy by design from the ground up. As a Belgian company we adhere to GDPR and European data protection standards. Your organizational models are treated as sensitive data. All data is end-to-end encrypted — not even we can decrypt your models.

Start modeling today.

No install. No credit card. Open your browser and go.

Open YADM → Create account