The agreement, written in the words we would use to explain it.

1. Who you are contracting with

Costwitness is a product of Corven & Ashby LLC, a limited liability company formed in the State of Wyoming, United States. In this document "we" and "us" mean Corven & Ashby LLC, and "you" means the company or public body that opens an account, together with anyone you grant access to. The service covers this website at costwitness.com, including the free tools, and the application at costwitness.app.

By opening an account or using the application you accept these terms. If you are accepting them for an organization, you are confirming that you are allowed to bind it.

2. What Costwitness is, and what it is not

Costwitness is software that records what you enter and calculates from it. It keeps a second record of a guaranteed maximum price contract on the owner's side, and it produces reports from that record.

It is not legal advice, an audit, a certification, or an opinion on your contract. It does not decide anything. Where the product raises a flag, that flag is a prompt to look, not a finding. In particular, the classification of a change as owner scope, design gap, or contractor risk remains your decision under your contract, and every figure the product shows is only as good as the documents and the numbers put into it.

Where we act as your reviewer during setup or on a monthly review, we do so as a consultant applying care and skill. We do not accept responsibility for a commercial decision you take, and we do not stand behind the accuracy of documents produced by anyone else, including the contractor.

3. Your account and the people you let in

Each person uses their own account. Do not share sign in details. Tell us promptly if you believe an account has been compromised.

You decide who reaches your project and at what scope, and you can revoke that at any time. Access granted by you is your responsibility: if you give a lender or a consultant access to a project, what they then see is a consequence of your grant. Every grant and every revocation is recorded with a time and a name.

4. Who owns what you put in

You do. Your contract documents, your figures, your baseline versions, your ledger and every report generated from them remain yours. We claim no ownership of them at any time.

We use your content for one purpose only: to run the service for you, including backup and support. We do not sell it. We do not use it to train any model. We do not use it to build a benchmark or a data product, whether identified or anonymized, unless you ask us in writing to include your project and we agree in writing.

5. What we do not do with your documents

A guaranteed maximum price amendment and the schedule of values behind it are among the most commercially sensitive documents on a construction project. So this section is specific rather than general.

Your documents are held on infrastructure we control, in the United States. They are not sent to any external artificial intelligence service, any analytics service, any advertising network, or any other third party product for processing. If we ever intend to change that, it will be announced on this page before it happens, it will be switched on per project rather than by default, and it will be your choice.

6. What you may not do

Do not upload anything you have no right to share. Do not attempt to reach another customer's data, probe the service for weaknesses without our written agreement, or use the application to provide the same service to third parties as if it were your own. Do not use the reports to state or imply that Costwitness has certified, approved or audited anything.

7. Fees, invoices and cancellation

The application is charged per active project, per month, on the plan set out on the pricing page, together with a one time setup fee for each project. Prices are in United States dollars and exclude any sales or use tax, which is added where it applies.

Invoices are issued monthly in advance and are payable within fourteen days.

You may cancel a project at any time. Cancellation takes effect at the end of the month already invoiced. We do not refund part of a month. The setup fee is not refundable once setup work has started, because that work is done by a person at the beginning.

8. Availability

We work to keep the service available and we tell you by email before planned maintenance that will interrupt it. We do not commit to a stated uptime percentage in this version of the product, and we say that plainly rather than promise a number we do not yet measure.

9. Ending this agreement, and getting your data out

Either side may end this agreement by written notice, effective at the end of the month already invoiced. We may suspend access immediately if an invoice is more than thirty days overdue, or if the service is being used in a way that threatens other customers, and we will tell you why.

At any time while your account is open, and after it closes, you can take a copy of your project data yourself from the Export screen inside the project, as CSV files or as one archive. You do not need to ask us and there is no waiting period. If you would rather we prepared it for you, we do that at no charge within ten business days. We delete your data when the account owner asks us in writing to delete it: from live systems at once, and from backups as those backups age out. We confirm when it is done.

10. Liability

Nothing here limits liability for fraud, for fraudulent misrepresentation, or for anything that cannot be limited under the law that applies.

Subject to that, our total liability arising out of or in connection with this agreement, whether in contract, in tort including negligence, or otherwise, is limited to the fees you paid us for the affected project in the twelve months before the event giving rise to the claim. We are not liable for loss of profit, loss of opportunity, loss of anticipated saving, or for any indirect or consequential loss.

You remain responsible for your own decisions about your contract, your payments and your project.

11. Confidentiality, both ways

We treat everything you put into the product as confidential. You agree to treat non public information about how the product works, including anything shown during a setup or a review, as confidential in the same way. Either side may disclose where the law requires it, having first told the other where it is allowed to.

12. Changes to these terms

If we change these terms in a way that materially affects you, we tell you by email at least thirty days before the change takes effect, and you may cancel before it does. Smaller corrections are published here with a new effective date.

13. The law that applies

This agreement is governed by the laws of the State of Wyoming, United States, without regard to its conflict of laws rules. The courts of the State of Wyoming have exclusive jurisdiction, except that either side may seek an injunction wherever it is needed to protect confidential information.

14. Contact

Questions about these terms go to info@costwitness.com, or through the contact page. Notices under this agreement may be sent by email to that address, or in writing to:

Corven & Ashby LLC
5830 E 2nd St, Ste 7000
Casper, WY 82609
United States

Effective August 26, 2026. Earlier versions are available on request.