Last updated: February 10, 2025
By creating an account on or otherwise accessing the 5sync platform ("Service"), you acknowledge that you have read, understood, and agree to be bound by these Terms of Service ("Terms"). These Terms form a binding contractual relationship between you and 5sync OÜ ("Company," "we," "us," or "our"), a company incorporated under the laws of the Republic of Estonia.
If you do not accept these Terms in their entirety, you must immediately cease all use of the Service. We encourage you to review these Terms periodically, as your ongoing use of the Service following any amendments signifies your consent to the updated provisions.
5sync provides a privacy-focused cloud storage and file synchronization platform. The Service allows users to upload, store, synchronize, and share digital files across multiple devices. We offer tiered subscription plans, including a free tier with limited storage capacity and paid tiers with expanded features and storage quotas.
A core component of the Service is client-side, zero-knowledge encryption. Files are encrypted locally on your device prior to transmission to our servers in Estonia. Because encryption keys are generated and held exclusively by you, 5sync OÜ has no technical ability to view, read, or otherwise access the plaintext content of your encrypted files.
We may introduce new features, modify existing functionality, or discontinue certain aspects of the Service at our discretion. Where practicable, we will give advance notice of significant changes that may affect your use of the Service.
Use of the Service requires you to register for an account by supplying a valid email address and creating a secure password. You represent and warrant that all information provided during registration is truthful, current, and complete. It is your sole responsibility to safeguard your login credentials and to promptly inform us of any suspected unauthorized access to your account.
Each natural person may maintain only one active account. Accounts are personal and non-transferable. You must be at least sixteen (16) years of age to register. If we discover that an account holder does not meet the minimum age requirement, we reserve the right to suspend or delete the account without prior notice.
You agree to use the Service in a manner that is lawful and consistent with its intended purpose. The following activities are strictly prohibited: (a) uploading, storing, or distributing content that violates any applicable law or regulation; (b) transmitting malicious code, including viruses, trojans, worms, or ransomware; (c) attempting to probe, scan, or test the vulnerability of the Service or any related infrastructure; (d) using automated tools to scrape, harvest, or extract data from the Service; (e) impersonating another person or misrepresenting your affiliation with any entity.
We reserve the right to investigate potential violations of this section and to take appropriate action, which may include issuing warnings, restricting features, suspending access, or permanently terminating your account. Where circumstances permit, we will endeavour to provide reasonable notice before taking enforcement action.
All content you upload to the Service remains your property. 5sync OÜ claims no ownership interest in your files, documents, or other materials. By using the Service, you grant us a limited, revocable, non-exclusive, and non-transferable license to store, transmit, and cache your content solely to the extent necessary for the operation and delivery of the Service. This license expires immediately upon deletion of the relevant content or closure of your account.
The Service itself — including but not limited to its source code, user interface designs, logos, brand names, and accompanying documentation — is the exclusive property of 5sync OÜ and is protected under Estonian and international intellectual property law. No right or license to use any of our trademarks, trade names, or other proprietary assets is granted to you except as expressly set forth herein.
Our desktop and mobile client applications are released under open-source licenses as specified in their respective repositories. The terms of those licenses govern your use of the client software and prevail over these Terms to the extent of any conflict.
The manner in which we collect, process, store, and safeguard your personal data is detailed in our Privacy Policy, which forms an integral part of these Terms. By using the Service, you confirm that you have reviewed the Privacy Policy and consent to the data handling practices described therein.
Because of our zero-knowledge encryption architecture, 5sync OÜ is technically unable to access, inspect, or modify the encrypted contents of files stored on the Service. Consequently, we cannot fulfil content-specific data requests, perform content moderation on encrypted files, or assist in the recovery of files if you lose your encryption key. You accept sole responsibility for the secure management and backup of your encryption credentials.
Paid subscription plans are billed on a recurring monthly or annual basis, as selected at the time of purchase. Charges are processed in advance at the beginning of each billing cycle. Your subscription will renew automatically unless you cancel it through your account settings prior to the next renewal date.
All prices are denominated in Euros (EUR) and include applicable value-added tax (VAT) where required by law. We accept payment by major credit and debit cards, as well as SEPA bank transfers. In the event of a failed payment, we will retry the charge and notify you by email. If payment remains unsuccessful for fourteen (14) consecutive days, your account may be reverted to the free Starter plan, and access to features and storage in excess of the Starter limits may be restricted.
Under European consumer protection regulations, you have the right to cancel a new subscription within fourteen (14) days of the initial purchase and receive a full refund, provided you have not consumed a material portion of the Service during that period. To request a refund, contact us at billing@5sync.com.
We undertake commercially reasonable efforts to keep the Service operational and accessible around the clock. However, we do not guarantee uninterrupted or error-free availability. The Service may be temporarily unavailable due to scheduled maintenance windows, software deployments, infrastructure upgrades, or events outside our reasonable control, including but not limited to natural disasters, network outages, or governmental actions.
Planned maintenance will be announced at least forty-eight (48) hours in advance via our status page and, for extended outages, by email notification. Urgent security patches or critical fixes may be applied without prior notice when necessary to protect the integrity of the Service or the data of our users.
To the fullest extent permitted under Estonian law, 5sync OÜ shall not be held liable for any indirect, incidental, consequential, special, or exemplary damages — including but not limited to loss of profits, loss of data, loss of business opportunities, or reputational harm — arising out of or in connection with your use of or inability to use the Service, even if we have been advised of the possibility of such damages.
Our aggregate liability for all claims arising under or relating to these Terms shall in no event exceed the total fees actually paid by you to 5sync OÜ during the twelve (12) month period immediately preceding the event giving rise to the claim. Nothing in these Terms shall exclude or limit our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for any other liability that cannot be lawfully excluded or limited under the laws of Estonia.
You may terminate your account at any time by using the account deletion feature in your dashboard or by sending a written request to our support team. Following termination, we will retain your encrypted data for a grace period of thirty (30) calendar days to allow for account recovery or data export. After this period, all data associated with your account will be permanently and irreversibly deleted from our servers.
We may suspend or terminate your account without advance notice if we reasonably determine that you have materially breached these Terms, engaged in conduct that poses a security risk to the Service or other users, or if required to do so by law. In cases of termination for breach, we will provide a written explanation of the grounds for termination and, where appropriate, a reasonable opportunity to cure the breach before permanent account closure.
Termination of your account does not release you from any obligations incurred prior to the termination date, including any outstanding payment obligations.
5sync OÜ reserves the right to revise, amend, or supplement these Terms at any time. For material changes — including modifications to pricing, data handling, or user rights — we will provide at least thirty (30) days' advance notice by email and by posting a prominent announcement within the Service. If you disagree with the revised Terms, you may terminate your account before the changes take effect.
Minor editorial corrections, clarifications, or formatting adjustments may be made without advance notice. The "Last updated" date at the top of this document will always reflect the date of the most recent revision.
These Terms shall be governed by and interpreted in accordance with the substantive laws of the Republic of Estonia, excluding its rules on conflict of laws. Any dispute, controversy, or claim arising out of or in connection with these Terms, or the breach, termination, or invalidity thereof, shall be submitted to the exclusive jurisdiction of the courts of Tallinn, Estonia.
If you are a consumer habitually resident in another Member State of the European Union, you retain the right to invoke the mandatory consumer protection provisions of your country of residence. In addition, you may bring proceedings in the competent courts of the Member State in which you are domiciled. Nothing in these Terms shall deprive you of the protections afforded to consumers under applicable EU legislation, including Directive 2011/83/EU on consumer rights.
If you have any questions, concerns, or requests regarding these Terms, please reach out to us using the details below:
5sync OÜ
Pärnu mnt 15
10141 Tallinn, Estonia
Email: legal@5sync.com
Billing inquiries: billing@5sync.com
For matters relating to data protection or the exercise of your rights under the GDPR, please contact our Data Protection Officer at dpo@5sync.com.