CalmSign
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Terms of service

Written to be read. These terms set out what we owe you, what you are responsible for, and what happens if either side wants to stop.

Last updated 18 August 2026

1. The agreement

These terms are an agreement between you and CalmSign, a company established in Estonia, which operates the CalmSign service. They apply when you use usecalmsign.com or the application at app.usecalmsign.com, whether you are paying or on the free plan. If you are agreeing on behalf of a company, you are confirming you have authority to bind it. If you do not accept the terms, do not use the service. Our privacy policy forms part of this agreement.

2. What CalmSign is

CalmSign lets you build or upload a document, send it as a private link, and collect an electronic signature. Your recipient does not need an account, a password, or an app. When the last signature lands, both sides receive an identical copy sealed with a SHA-256 hash and accompanied by an audit trail recording who did what, when, and from where. That is the whole product; everything else on the site is a way of getting to it.

4. Accounts and eligibility

You need to be 18 or older and legally able to enter a contract. Give us accurate details, keep your password to yourself, and tell us promptly if you think someone else has access. You are responsible for what happens under your account, including anything done by team members you invite on a Business plan. One person may not share a single-seat account across a team.

5. Your documents are yours

You keep every right you have in the documents you create, upload, or send. You grant us only the licence we need to run the service for you: to store, process, transmit, render, and deliver that content, and to produce the sealed copies and audit records the product exists to produce. That licence ends when you delete the content, subject to the backup window described in our privacy policy.

What the document says is your responsibility, not ours. You confirm you have the right to send it, that you have a lawful basis for giving us the recipients' details, and that the document's contents, promises, and legal effect are yours to stand behind. We do not review documents before they are sent.

6. Acceptable use

Do not use CalmSign to:

  • break the law, or send documents intended to defraud, deceive, or coerce someone;
  • impersonate another person, or sign in someone else's name without their authority;
  • send unsolicited bulk email, phishing, or malware;
  • upload content you have no right to distribute;
  • probe, scrape, overload, or reverse engineer the service, or work around plan limits or rate limits;
  • resell or white-label the service without a written agreement with us.

Security research is welcome when it is done in good faith and reported to us first — see the contact page.

7. Electronic signatures: ESIGN and eIDAS

CalmSign is built to support electronic signatures under the US ESIGN Act and UETA, and under eIDAS in the EU and UK. It captures the things those frameworks care about: the signer's intent to sign, their consent to do business electronically, attribution of the signature to a person, and a retained record both parties can keep. The SHA-256 seal and audit trail exist to make that record verifiable rather than merely asserted.

Two honest limits. First, CalmSign produces electronic signatures, not qualified electronic signatures under eIDAS — we do not issue qualified certificates, and where your document specifically requires a QES, CalmSign is not the right tool. Second, whether any given signature is valid and enforceable depends on the document, the parties, and the jurisdiction, not on the software. Some instruments are commonly excluded from electronic signing — wills and codicils, some family law and property documents, some court filings, and notarised instruments among them.

You are responsible for checking that electronic signature is appropriate for what you are sending. We make no promise that a particular signature will be upheld in a particular proceeding.

8. Plans, billing, and taxes

  • Free — $0/month. Five documents per month, with the same tamper seal, audit trail, and verification as every other plan. The proof is not a paid feature.
  • Pro — $12/month. Unlimited documents, templates, custom branding, and priority support, for one person.
  • Business — $29/month. Up to five team members at a flat rate, plus API access, webhooks, and bulk send.

Prices are in US dollars and exclude VAT, GST, and sales tax, which we add where we are required to. Paid plans renew each month until you cancel, charged to your payment method on the renewal date. Free-plan document allowances reset at the start of each billing month and do not roll over. If a payment fails we will retry and email you; if it keeps failing we may downgrade the account to Free. We will give at least 30 days' notice by email before changing the price of a plan you are on.

9. Cancellation, export, and deletion

Cancel whenever you like, from your account settings. Cancellation takes effect at the end of the period you have already paid for; we do not pro-rate partial months, except where consumer law says otherwise. There is no cancellation fee and nobody will ask you to get on a call first.

You can download any completed document with its audit trail at any time, including after you cancel and drop to the Free plan. If you close your account entirely, export first: deletion is permanent, and a deleted document takes its audit trail with it. See the retention section of the privacy policy for exact windows.

10. Availability and support

We work to keep CalmSign available and fast, but we do not offer a contractual uptime guarantee unless one is separately agreed with you in writing. We may take the service down for maintenance, and will avoid business hours where we can. Support is by email at hello@usecalmsign.com for every plan, with Pro and Business queries answered first. Signing links, reminders, and completed copies are delivered by email, and we cannot control a recipient's spam filter or mail server.

11. Suspension and termination

We may suspend or close an account that breaches these terms, that has not paid, or where the law requires it. Except where the breach is serious or urgent — fraud, abuse, or a threat to the service — we will contact you first and give you a chance to put it right. If we close your account for a reason other than your breach, we will refund the unused part of any prepaid term and give you a reasonable window to export your documents.

12. Warranty disclaimer

To the fullest extent the law allows, CalmSign is provided as is and as available, without warranties of any kind, whether express or implied, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the service will be uninterrupted or error-free, that any document you produce with it is legally sufficient, or that a signature collected through it will be enforced by any court or authority. Nothing here excludes liability that cannot lawfully be excluded, including your statutory rights as a consumer.

13. Limitation of liability

To the fullest extent permitted by law, neither party is liable for indirect, incidental, special, consequential, or punitive damages, or for lost profits, lost revenue, lost business, or lost or corrupted data, however caused. Our total aggregate liability arising out of or relating to these terms is limited to the greater of the amount you paid us in the twelve months before the claim arose, or one hundred US dollars. We do not exclude liability for death or personal injury caused by negligence, for fraud, or for anything else that cannot be excluded under the applicable law.

14. Indemnity

You agree to indemnify us against claims, losses, and reasonable costs arising from documents you send through CalmSign, from your breach of these terms, or from your infringement of someone else's rights. We will tell you promptly about any such claim and let you control the defence, provided any settlement does not admit fault on our part.

15. Changes to the service and these terms

The product will change; that is what a product does. We may add, alter, or retire features, and we will not remove something material from a paid plan without telling you first. We may also update these terms — the date at the top shows when we last did. For a material change we will email account holders at least 30 days before it takes effect. Carrying on using CalmSign after that date means you accept the new version; if you would rather not, cancel and we will refund the unused part of your term.

16. Governing law and disputes

These terms are governed by the laws of the Republic of Estonia, and the courts of Estonia have exclusive jurisdiction, except that either party may seek injunctive relief wherever it is needed. If you are a consumer, this does not deprive you of the protection of the mandatory laws of the country you live in. Before filing anything, email us — most disputes turn out to be a misunderstanding that a reply can fix.

17. General

These terms and the privacy policy are the entire agreement between us about CalmSign and replace anything said beforehand. If a provision is held unenforceable, the rest stays in force. Not enforcing a right straight away does not waive it. You may not assign this agreement without our consent; we may assign it to a successor if the business changes hands, and we will tell you if that happens. Questions about any of this go to hello@usecalmsign.com.