Disclaimer

Last updated: 3 August 2026

This disclaimer applies to the CRAYON-C4 service (the “Service”) — the web application, documentation, command-line tools, and editor extensions we provide. By using the Service you accept this disclaimer. If you do not agree with it, please do not use the Service.

1. Service provided “as is”

The Service is provided on an “as is” and “as available” basis. We work hard to keep it reliable, but we do not warrant that the Service will be uninterrupted, timely, secure, or error-free, or that defects will be corrected. Features may change, be suspended, or be withdrawn at any time.

We are not responsible for unavailability or degraded operation caused by events outside our reasonable control, including failures of hosting, network, browser, or other third-party infrastructure.

2. Your data and your backups

You are solely responsible for backing up your work. Keep regular, independent copies of your projects outside the Service — for example by using the built-in export features to download your project files — and verify from time to time that those copies can actually be opened and restored.

Local (free) projects are stored only in your browser’s local storage on your own device. We never hold a copy. Clearing browser data, reinstalling or updating your browser, using private/incognito mode, or losing the device can permanently and irrecoverably destroy local projects.

Cloud projects keep version snapshots as a convenience feature — not as a backup service. Snapshots are retained for a limited period only: you should assume that restore points older than 7 days are not available. The retention window may be changed, reduced, or discontinued at any time without notice.

Although we perform routine operational backups of our systems, we do not guarantee that your data will never be lost, corrupted, or become unavailable. To the maximum extent permitted by applicable law, we accept no liability for loss or corruption of data where you have not maintained your own independent backups.

3. Data retention and account termination

When your subscription ends or your account is deleted, your cloud data may be permanently deleted after a limited period. Export your projects before cancelling a subscription or deleting an account. Deleted data cannot be recovered once removed from our systems.

4. Limitation of liability

To the maximum extent permitted by applicable law, we shall not be liable for any indirect, incidental, special, or consequential damages — including lost profits, lost revenue, business interruption, or loss of data — arising out of or related to your use of, or inability to use, the Service.

Our total aggregate liability for all claims arising out of or related to the Service shall not exceed the fees you paid to us in the twelve (12) months preceding the claim, or €100 if you have paid no fees, whichever is greater.

Nothing in this disclaimer excludes or limits our liability for:

5. Third-party services

The Service relies on third-party providers — including hosting, authentication, payment processing, and email delivery. Those services are governed by their own terms and privacy policies, and we are not responsible for their availability or conduct.

6. No professional advice

Diagrams, documentation, and examples produced with or provided by the Service are for informational purposes only. The Service does not validate the correctness, security, or fitness of your architecture; decisions you make based on content created with the Service are your own responsibility.

7. What we measure

We use Vercel Web Analytics and Vercel Speed Insights to understand how the Service is used and how fast it runs. Both are cookieless: they set no cookies, store nothing on your device for this purpose, and do not build a profile of you or track you across other websites. Visitors are counted using a rotating, non-reversible identifier that cannot be linked back to a person, and it changes daily.

What is collected is limited to: the page visited, the referring site, country (derived from your IP address, which is not stored), device type, browser and operating system, and page-performance timings. Alongside this we record a small number of anonymous product events — for example that a project was created, that a diagram was exported, or that the tour was started.

The content of your architecture is never sent to analytics. No element, diagram, project or decision names, descriptions, identifiers, file names, or model data of any kind leave your project for this purpose. Project identifiers and invitation links are removed from page addresses before any measurement is recorded, and product events carry only fixed labels and counts.

We use this only in aggregate, to decide what to build and what to fix. It is not used for advertising and is not sold or shared for advertising. Vercel processes this data on our behalf as our hosting provider.

8. Your statutory rights

Nothing in this disclaimer limits or excludes any statutory rights you have as a consumer that cannot be limited or excluded under applicable law. If you are a consumer in the European Union, you retain all protections afforded by EU consumer law.

9. Changes to this disclaimer

We may update this disclaimer from time to time. The “last updated” date above reflects the latest revision. Continued use of the Service after a change constitutes acceptance of the updated disclaimer.

10. Who we are, and how to reach us

Legal entity
SQUORA
Registered address
W.F. Hermansstraat 526, 3544 KP Utrecht, The Netherlands
Chamber of Commerce (KvK)
42105674
VAT number
NL001924069B86

Questions about this disclaimer? Reach us through the support page. See also the terms of service and the privacy notice.