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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 YADM APP
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 DEMO language.

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
Dieter
Product Owner
Frederic
Frederic
Developer
Chadwick
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. Your models are stored locally in your browser, and you can import or export them as JSON to share, back up, or edit them later. With a paid plan, you support the project and unlock online storage, model sharing, and support for legacy schema versions-so your models remain compatible across updates.
Yes! YADM offers a free 14-day trial of both Personal and Organization plans. No credit card or billing information is required. Your trial starts immediately, with no setup hassle. When it ends, we’ll contact you personally. If you’d like to continue, we’ll manually send you an invoice for an annual license. Want to switch back to a free guest account? Simply export your data and delete your account.
No. YADM runs entirely in your browser. Nothing to install, no dependencies, no configuration. We used open source frameworks that are browser native, this way we don’t have vendor lock-in and YADM works on Mac, Windows, Linux, with any modern browser.
YADM puts privacy first with enterprise-grade, end-to-end encryption. Your models stay private-not even we can decrypt them. As a Belgian company, we comply with GDPR and European data protection standards. No third-party tracking, external calls, or AI training. You can permanently export or delete your data at any time.

Start modeling today.

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

Open YADM → Create account