pricing

simple, transparent
pricing

Start free. Upgrade when you need more power. No hidden fees. Cancel anytime.

monthly
annual 2 months free
Open Source
Self-hosted
Keep your data private.
$ 0 /mo
  • Unlimited diagrams
  • Unlimited objects
  • Unlimited local editors & viewers
  • tld CLI + agent skills
  • Real-time collaboration
  • Comments & threads
  • Notifications
View on GitHub
Free
Starter
For individuals and small teams.
$ 0 /mo
  • 20 diagrams
  • 200 objects
  • 3 editors, unlimited viewers
  • tld CLI + agent skills
  • Real-time collaboration
  • Comments & threads
  • Notifications
Get started
faq

Common questions

No. The Starter plan is completely free and requires no payment information. Create an account and start diagramming immediately.
Yes. Paid plans can be cancelled at any time. You'll continue to have access until the end of your billing period, then drop to the free tier. No lock-in, no questions asked.
Editors are members who can create and modify diagrams - both the Owner and Editor roles count toward your editor seat total. Viewers (read-only access) are always free and unlimited on every plan.
Your diagrams are never deleted. If you downgrade past the free tier limit (20 diagrams), your extra diagrams become read-only until you either upgrade again or delete the excess ones. Pro features like real-time collaboration and API access will be visibly disabled until you re-upgrade.
Yes. Pro comes with a 14-day free trial - no credit card required. You'll get full access to every Pro feature including real-time collaboration, the API, tld CLI, and unlimited sharing. You'll be prompted to add payment details if you decide to keep it after the trial.
The annual plan is billed once per year at $14.99/editor/mo - that's 2 months free compared to the monthly rate of $19.99/editor/mo. The annual charge is calculated as $179.99/yr per editor seat at the time of billing.

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systems today

Free forever. No credit card. Upgrade when ready.