Terms of service

Version 2026-08-12 · in effect August 12, 2026. We keep prior versions and will tell account holders before a material change takes effect.

Who you are agreeing with

Proofground is a service of Chest LLC (“we”, “us”). These terms are an agreement between you and the company. They cover the website, the report cards we publish, and the testing service you can buy an account for. If you are agreeing on behalf of an organisation, you are confirming you may bind it.

What the service is

We place controlled, recorded test conversations with AI phone and chat agents, score them against a written rubric, and report the results with the evidence behind them. Two things follow from that, and they are the most important sentences here:

• A grade is a measurement, not a guarantee. It describes how a product behaved on specific conversations on specific dates. It is not a promise about how that product will behave for you, on your configuration, tomorrow.
• You are responsible for your own purchasing decisions. Use our evidence as one input. We recommend testing a shortlist against your own account before you sign with anyone, which is what the paid service exists to let you do.

Accounts

• Give accurate information, keep your credentials secure, and tell us promptly at hello@proofground.ai if an account is used without your authorisation.
• You are responsible for activity under your account, including tests it starts and charges those tests incur.
• A vendor account is verified by an email address on the company’s own domain, and it tests that vendor’s published demo line. To test a different number, an internal build or a configured account, open a customer account instead.
• We may suspend an account that is being used to break these terms, to test a line the account holder has no right to have tested, or in a way that risks harm to a third party.

Testing you commission, and what you must be entitled to

When you start a test, you are instructing us to place conversations with the line you name. You confirm that you are entitled to have that line tested — because you operate it, because the vendor publishes it for anyone to call, or because you have the operator’s permission. This matters: the calls are real calls to a real business, and you are the party who knows whether they are welcome.

• We test published demo lines and lines our customers are entitled to have tested. We do not test a real practice’s production line without the operator commissioning it.
• Our callers are synthetic. They use fictional identities and fictional details, they never present as a real person, and they identify themselves as a test when asked directly.
• Test conversations are recorded, because a score with no evidence behind it is an opinion. See the privacy policy for what happens to those recordings.
• You may not use the service to harass a business, to generate load intended to disrupt a service, or to gather information for a purpose you have concealed from us.

Fees

• Prices are shown before you start and on the pricing page, which reads live from the same source that bills you. The price you were shown when a run started is the price that run bills at, even if we publish a new price later.
• Metered plans bill monthly in arrears: a fixed monthly amount, if your plan has one, plus a per-conversation rate. Every conversation that reaches a scored outcome bills.
• A conversation our own equipment broke is never billed to anyone. If we broke the call, you do not pay for it, and it does not count in anyone’s results either.
• A card must be on file before the first conversation that can bill, including on plans with no monthly fee.
• Cancelling stops future testing. Conversations that already ran in the current period are invoiced — they happened, so they bill. A monthly fee already charged for a started period is not automatically refunded; write to us and we will look at it.
• Taxes, if any apply, are your responsibility unless we state otherwise.

Published grades, and how a vendor challenges one

We also publish assessments of vendors who are not our customers and have agreed to nothing. Those vendors are not bound by these terms, and this section is here so that what we do is on the record rather than only in our marketing:

• We choose who to test, we pay for the testing, and a grade cannot be bought, delayed or removed. What a vendor can buy is cadence — testing of their own line more often than our public schedule reaches them — and never a different outcome.
• Any vendor can dispute any published result, free, forever. We re-review it against the recording and either stand by the score with the evidence or correct it and badge the card as corrected. Disputes are free precisely so that money is never the route to a correction.
• Every assessment is a dated snapshot. We supersede assessments in the open rather than quietly editing them.
• Vendor names and marks belong to their owners. We use them to identify the products we assess, which is nominative use, and we claim no affiliation or endorsement.

Our content, and what you may do with it

The site, the rubrics, the reports and the software are ours or our licensors’. You may read, quote and link to our published assessments with attribution. You may not scrape the site at scale, resell our reports, republish a grade without identifying it as ours and dating it, or present our results as something other than what they are. Your own test results are yours; we may use aggregated, de-identified information about how the service performs to improve it.

Warranties and liability

We work hard to be accurate and we publish our method so it can be checked. Even so, the service is provided “as is”: we do not warrant that it will be uninterrupted or error-free, or that a grade will predict a product’s behaviour in your environment. To the fullest extent the law allows, Chest LLC disclaims implied warranties of merchantability, fitness for a particular purpose and non-infringement.

To the fullest extent the law allows, Chest LLC’s total liability for any claim relating to the service is limited to the amount you paid us for the service in the twelve months before the claim, and we are not liable for indirect, incidental, special or consequential damages, or for lost profits or lost business. Nothing here limits liability that cannot be limited by law.

These obligations are the company’s. No individual founder, employee or contractor of Chest LLC is a party to this agreement or personally liable under it.

Ending the agreement

You may close your account at any time. We may suspend or end an account for a material breach of these terms, for non-payment, or where continuing would expose someone to harm — with notice where it is practical to give it. Fees for testing already performed remain payable. Published assessments are part of the public record and are not withdrawn when an account closes.

Changes, law, and reaching us

We may update these terms. Material changes are notified to account holders before they take effect, and the version above tells you which text applied when you agreed. Continuing to use the service after a change takes effect means the new version applies.

These terms are governed by the laws of the State of Maryland, United States, without regard to conflict-of-laws rules, and the state and federal courts located there have exclusive jurisdiction. If a provision is unenforceable, the rest stands.

Questions, notices and legal correspondence: hello@proofground.ai.