Terms of Service

Last updated 25 August 2026.

These Terms govern your use of Concentration Chart (the "Service"), provided by EngSec LLC ("we", "us", "our"). By using the Service you agree to them. If you agree on behalf of an organisation, you represent that you have authority to bind it, and "you" means that organisation.

1. The Service

Concentration Chart is an application that runs in your web browser. It reads files you select from your own device, processes them locally, and displays and exports the result. We provide and host the application; the analysis is performed by your browser on your machine.

We may change, add or remove features. If we make a change that materially reduces functionality you are paying for, you may cancel and receive a pro-rata refund of the unused portion of your current period.

2. Your data and your responsibilities

You retain all rights in the files you use with the Service and in the outputs it produces. We claim no ownership of them and we do not receive them: the Service does not transmit your board images, placement data, failure records or generated reports to us or to any third party, and it is served with a content security policy that prevents it from doing so. See our security model and privacy policy.

You are responsible for:

3. Acceptable use

You agree not to:

Good-faith security research conducted under our disclosure policy is welcome and does not breach this section.

4. Plans, fees and renewal

5. Licence keys

Paid plans are enabled by a licence key: a signed file your browser verifies locally. We grant you a non-exclusive, non-transferable right to use it for the seats and term your plan covers. It is not a login, and anyone holding it can enable the paid features, so treat it as confidential. Tell us promptly if it is exposed and we will re-issue it.

6. Support

Paid plans include email support with a target first response of one business day; the Free plan is supported on a best-effort basis. These are targets, not guarantees, and we do not commit to a resolution time. We do not currently offer a service level agreement with credits; if you need one, talk to us.

7. Availability

We aim to keep the Service available but do not guarantee uninterrupted access. Because the application runs locally, a copy already loaded in your browser continues to work without us, and exported reports and saved board packages remain usable indefinitely and do not depend on our continued operation.

8. Disclaimer of warranties

To the maximum extent permitted by law, the Service is provided "as is" and "as available", and we disclaim all warranties, express or implied, including merchantability, fitness for a particular purpose, title and non-infringement. We do not warrant that the Service will be error-free or that its output is accurate, complete or suitable for any decision.

The Service is an analysis aid, not a substitute for engineering judgement. You are responsible for verifying its output before relying on it — including confirming that components are placed where you expect on your board — and for any manufacturing, process or quality decision you make. Do not use it as the sole basis for a safety-related determination.

9. Limitation of liability

To the maximum extent permitted by law, neither party is liable for indirect, incidental, special, consequential or exemplary damages, or for lost profits, revenue, data, goodwill or the cost of substitute services, however caused and on any theory of liability.

Our total aggregate liability arising out of or relating to the Service will not exceed the greater of (a) the fees you paid us in the twelve months before the event giving rise to the claim, or (b) one hundred US dollars. Nothing in these Terms limits liability that cannot be limited by law, including for fraud or for death or personal injury caused by negligence.

10. Indemnity

You will defend and indemnify us against third-party claims arising from your use of the Service in breach of these Terms, from the content of files you send us, or from your infringement of a third party's rights. We will notify you promptly of any such claim, allow you to control the defence, and cooperate at your expense.

11. Intellectual property and feedback

The Service, including its software, design and documentation, remains our property and that of our licensors. These Terms grant no rights except as expressly stated.

If you send us suggestions or feedback, you grant us a perpetual, worldwide, royalty-free right to use it to improve the Service, without obligation to you. We will not identify you or your organisation as the source without permission.

12. Confidentiality

Where you share non-public information with us — a sample export, details of a problem, or commercial terms — we will use it only to provide and improve the Service and will not disclose it to third parties except to the providers listed on our sub-processors page, or where required by law.

13. Term and termination

You may stop using the Service at any time. We may suspend or terminate access if you materially breach these Terms and do not cure the breach within 14 days of notice, or immediately where the breach cannot be cured or the law requires it. On termination your right to use the Service ends; sections 2, 8, 9, 10, 11, 12 and 15 survive.

14. Compliance and export

You represent that you are not located in, or ordinarily resident in, a country or region subject to comprehensive sanctions, and that you are not on a restricted-party list. You agree not to use the Service in violation of applicable export control or sanctions laws.

15. General

Contact

EngSec LLC · questions about these Terms: hello@engsecsolutions.com. Registered company details are available on request.