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:
- ensuring you are permitted to use the files you load, including where they are subject to a confidentiality agreement with a customer of yours;
- anything you choose to send us separately, such as a sample export file — please remove confidential and personal information first;
- safeguarding your licence key, which is a credential; and
- verifying the Service's output before acting on it (see section 8).
3. Acceptable use
You agree not to:
- use the Service unlawfully or to infringe anyone's rights;
- attempt to gain unauthorised access to our systems, or disrupt the Service for others;
- circumvent, disable or tamper with licensing, or use a licence key beyond the seats your plan covers;
- reverse engineer the Service except to the extent that restriction is unenforceable by law;
- remove or obscure notices in the Service or in files it generates; or
- resell, sublicense or provide the Service to third parties as your own without a written agreement with us.
Good-faith security research conducted under our disclosure policy is welcome and does not breach this section.
4. Plans, fees and renewal
- Free plan. Provided at no charge and may be modified or discontinued at any time. Sections 8 and 9 apply with particular force.
- Paid plans. Billed in advance for the period stated at purchase ($199 per month for Team at the time of writing) and renew automatically for successive periods until cancelled.
- Cancellation. You may cancel at any time, effective at the end of the current period. We do not refund partial periods except where these Terms or the law require it.
- Price changes. We may change prices for future periods on at least 30 days' notice. Continuing after the change takes effect means you accept the new price.
- Taxes. Fees exclude sales, use, VAT and similar taxes, which you are responsible for except for taxes on our income.
- Non-payment. If payment fails we may suspend paid features after notice and a reasonable opportunity to fix it. The Free plan remains available.
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
- Governing law. These Terms are governed by the laws of the state in which EngSec LLC is organised, without regard to its conflict-of-laws rules. The parties submit to the exclusive jurisdiction of the state and federal courts of the state in which EngSec LLC is organised.
- Force majeure. Neither party is liable for failure to perform due to events beyond its reasonable control.
- Assignment. You may not assign these Terms without our written consent. We may assign them to a successor in connection with a merger or sale of substantially all assets.
- Notices. We may give notice by email to the address associated with your subscription or by posting on this site. Notices to us go to hello@engsecsolutions.com.
- Entire agreement. These Terms, with our privacy policy and any order form, are the entire agreement between us on this subject and supersede earlier discussions. Terms on your purchase order do not apply unless we sign them.
- Severability and waiver. If a provision is unenforceable the rest remains in effect. Not enforcing a provision is not a waiver of it.
- No third-party beneficiaries. These Terms create rights only between you and us.
- Changes. We may update these Terms. Material changes will be notified to paying customers at least 30 days in advance and the date above will change. Continuing to use the Service after a change takes effect means you accept it.
Contact
EngSec LLC · questions about these Terms: hello@engsecsolutions.com. Registered company details are available on request.