← Back to Diagravo

Terms of Service

Last updated October 2026

These Terms of Service ("Terms") govern your use of Diagravo, run by Powerzam Studio, a sole proprietorship based in Denmark ("we," "us," "Diagravo"). By using Diagravo, you agree to these Terms. If you don't agree, don't use the service.

1. What Diagravo is

Diagravo is a browser-based visual architecture design and prototyping tool: drag components onto a canvas, connect them, and watch an animated visualization of request flow, with a JSON code panel kept in sync with the canvas. It's a prototyping and communication tool — it does not provision real infrastructure, and the flow-playback animation is illustrative only, not a simulation of real load, latency, or capacity. Core diagramming runs client-side in your browser and works without an account (your diagrams are then kept in your browser's storage, on your device). An account is needed to sync diagrams to the cloud, publish a shareable link, and collaborate with other people.

2. Accounts

  • You must provide accurate information when creating an account.
  • You may sign in with an email and password or with Google.
  • You're responsible for keeping your account credentials secure.
  • You must be at least 16 years old to create an account (see Privacy Policy, section 10).
  • We may suspend or terminate accounts that violate these Terms.

3. Guest use

You may use Diagravo's core diagramming and export features without an account. A guest's diagrams are kept only in the browser on their own device — we do not receive or store them — and using Diagravo this way does not create any account-linked record; see the Privacy Policy for details. Clearing your browser's data deletes those diagrams, so export a diagram if you want a copy.

4. Free tier, paid plans, cancelling and refunds

  • Diagravo has a free plan, subject to usage limits (for example, how many diagrams you can sync to the cloud and how many components a cloud diagram can hold). The current limits for every plan are shown on our pricing page.
  • We may change what's included in the free tier with reasonable notice.

Paid plans. The price, billing period (monthly or yearly) and what is included in a paid plan are shown before you pay. You are billed through Creem, our payment provider and Merchant of Record, and you agree to Creem's applicable terms for payment processing. We do not receive or store your card details. A paid plan renews automatically at the end of each period until you cancel.

Cancelling. You can cancel at any time, from Manage subscription in your Account window (it opens Creem's page for your subscription), using the link Creem emails you, or by emailing contact@diagravo.com. Cancelling stops the next renewal. You keep the paid features until the end of the period you have already paid for. Your diagrams are not deleted because a plan ends; what happens to a synced diagram that no longer fits your plan is described on our pricing page.

Refunds. If you are not happy, email contact@diagravo.com within 3 days of your first payment for a plan, monthly or yearly, and we will refund that payment in full, with no reason needed. Your request counts from the moment you send it, not from the moment we reply. The refund goes back to the payment method you used, through Creem. We offer this refund once per customer: if we have already refunded you once, we may decline a further refund request under this policy. After those 3 days, the period you have already paid for is not refunded, except for a billing mistake (for example being charged twice or the wrong amount), or where the law gives you more.

Your legal rights. Nothing in this section limits rights you have under mandatory consumer law. Wherever the law of the country you live in gives you a longer period to withdraw from an online purchase (for example 14 days for consumers in the EU and the UK), that longer period applies instead of the 3 days above, and we will refund within it as the law requires. The limit of one refund per customer does not take away a right you have by law.

If you have a problem with a charge, please write to us before disputing it with your bank, so we can put it right quickly.

5. Your content and published diagrams

  • You retain ownership of the diagrams you create using Diagravo.
  • By using the service, you grant us a limited license to store, process, and transmit your content solely as needed to operate Diagravo (e.g., saving your diagrams, serving published links, showing a shared diagram to the people you invited).
  • Publishing a diagram makes it publicly viewable to anyone with the link, with no account required to view it. You're solely responsible for deciding what to publish — don't publish diagrams containing information you consider confidential or sensitive.
  • You can take down your own link by removing the diagram from the cloud or deleting your account.
  • If you believe a published diagram is unlawful or infringes your rights, email contact@diagravo.com with the link and a short explanation. We review reports and may disable a link or remove content.
  • You're responsible for ensuring you have the rights to any content you input (e.g., component names, diagram names, custom icon images) and for how you use exported diagrams.

6. Collaboration

  • When you invite someone to a diagram, you choose whether they can view or edit it. Editors can change or delete the diagram's content, so invite only people you trust. You can remove someone's access at any time.
  • The people you invite can see your name and email address, and who is in the diagram.
  • Content that other people add to a diagram you share is their responsibility.

7. Acceptable use

You agree not to:

  • Use Diagravo to create or distribute unlawful, infringing, or harmful content, including as a published diagram or a custom icon.
  • Attempt to circumvent usage limits through technical means (e.g., automated abuse, multiple accounts to bypass limits).
  • Reverse-engineer, decompile, or attempt to extract the underlying application beyond what's permitted by applicable law.
  • Interfere with the operation of the service (e.g., excessive automated requests, attempts to breach security, brute-forcing accounts).

8. Availability and changes

  • Diagravo is provided on an "as is" and "as available" basis. We aim for high availability but don't guarantee uninterrupted service.
  • We may modify, add, or remove features over time, including introducing paid tiers, with reasonable notice.
  • We may update these Terms from time to time. We will tell you about material changes by email or a notice on the site. If you keep using Diagravo after a change takes effect, you accept it; if you don't agree, you can delete your account.

9. Limitation of liability

To the extent permitted by applicable law, Diagravo and its operator are not liable for indirect, incidental, or consequential damages arising from your use of the service, including loss of data or business interruption. Nothing in these Terms limits liability that cannot be limited under applicable law (e.g., Danish/EU consumer protection law).

10. Termination

You may stop using Diagravo and delete your account at any time from the Account window; your data is then deleted as described in the Privacy Policy. We may suspend or terminate your access if you violate these Terms, with notice where reasonably possible.

11. General

If you send us feedback or ideas, we may use them freely, without obligation to you. These Terms are the whole agreement between you and us about Diagravo; if a part of them is found to be unenforceable, the rest still applies.

12. Governing law

These Terms are governed by the laws of Denmark, without regard to conflict-of-law principles, except where mandatory consumer protection laws of your country of residence provide otherwise.

13. Contact

Questions about these Terms: contact@diagravo.com