00 Legal

Terms of Service

The contract between you and UltimaOS, in plain English.

These Terms of Service describe the contract between you and the European company that operates UltimaOS. We try to keep the language plain and the obligations clear. By using UltimaOS, you agree to these terms.

01 Overview

Section overview

The basics.

01

Provider

The service is provided by the European company that operates UltimaOS, as identified in the legal notice at the bottom of every page.

02

Eligibility

You must be at least 16 years old (or the digital consent age in your jurisdiction) to create an account. If you create an account on behalf of an organization, you represent that you have authority to bind that organization to these terms.

03

Acceptable use

You agree not to use UltimaOS for illegal activities, to distribute malware, to harass others, or to circumvent the technical measures we use to protect the service. We reserve the right to suspend accounts that violate these terms, with notice where possible.

02 Details

Section details

Your content and our role.

UltimaOS is a zero-knowledge service: we cannot read your content. These clauses describe what that means in practice and what we do — and do not do — with what reaches our servers.

01

You keep ownership of your content

You retain all intellectual property rights in the content you create, upload, or store on UltimaOS. We claim no ownership over your messages, files, or other data.

02

You give us a limited license to operate the service

You grant us a limited license to transmit, store, and process your encrypted content as technically necessary to provide the service. This license ends when you delete the content.

03

We do not read your content

The architecture is zero-knowledge. We have no technical ability to read your encrypted content and we make no claim to do so. This is verifiable in the open-source clients.

04

Account suspension is the strongest measure we have

Because we cannot read your content, the strongest measure available to us is suspending your account. Suspension stops new content from being added; existing encrypted content remains inaccessible without your keys.

03 Key points

Key takeaways

Liability, refunds, and changes.

  1. 01

    Liability

    Within the limits of applicable law, our liability is limited to the amounts you have paid us in the 12 months preceding the claim. We do not exclude liability for gross negligence, willful misconduct, or death and personal injury where such exclusion is prohibited.

  2. 02

    Refunds

    During early access, UltimaOS is free. After paid plans are introduced, refunds will be available on a pro-rata basis within the first 14 days of a billing cycle, unless local consumer law provides a longer period.

  3. 03

    Termination

    You can terminate your account at any time by deleting it from the client. We may terminate or suspend accounts that materially breach these terms, with notice where reasonably possible.

  4. 04

    Changes to these terms

    We may update these terms. Material changes will be announced at least 30 days in advance. Continued use after the effective date constitutes acceptance. If you do not accept the new terms, you can delete your account.

04b References

Authoritative sources

Standards and references.

05 Frequently asked

Common questions

Questions about the UltimaOS terms.

Who provides the service?
Short answer

The service is provided by the European company that operates UltimaOS, as identified in the legal notice at the bottom of every page.

What is the eligibility to use UltimaOS?
Short answer

You must be at least 16 years old (or the digital consent age in your jurisdiction) to create an account. If you create an account on behalf of an organization, you represent that you have authority to bind that organization to these terms.

What are acceptable uses?
Short answer

You agree not to use UltimaOS for illegal activities, to distribute malware, to harass others, or to circumvent the technical measures we use to protect the service. We reserve the right to suspend accounts that violate these terms, with notice where possible.

How do you handle copyright complaints?
Short answer

We respond to copyright complaints in accordance with applicable law (including the EU Copyright Directive). Send notices to copyright@ultimaos.com with the information required by law.

What is your refund policy?
Short answer

During early access, UltimaOS is free. After paid plans are introduced, refunds will be available on a pro-rata basis within the first 14 days of a billing cycle, unless local consumer law provides a longer period.

How can these terms change?
Short answer

We may update these terms. Material changes will be announced at least 30 days in advance. Continued use after the effective date constitutes acceptance. If you do not accept the new terms, you can delete your account.

What law governs these terms?
Short answer

These terms are governed by the law of the European Union member state where the operating company is incorporated. Disputes are subject to the jurisdiction of the courts of that member state, without prejudice to your rights as a consumer under your local law.

Can I use UltimaOS for my business?
Short answer

Yes. If you create an account on behalf of an organization, you represent that you have authority to bind that organization to these terms. Additional commercial terms may apply for enterprise plans.