Terms of Service
Last Modified: 23.09.2026
These Terms of Service ("Terms") are a binding agreement between you and AtomicMail Systems OÜ, established under Estonian law at Harju tn 3 // Vana-Posti tn 2, Tallinn 10146, Estonia ("Atomic", "we", "us"). They govern the Atomic services: Atomic Mail, the encrypted email service at atomicmail.io; Atomic Chat, the AI assistant at atomicmail.io/chat; and Atomic VPN, the no-log VPN at atomicvpn.io and auth.atomicvpn.io — together with our applications for each. Together these are the "Services". One Atomic Account and one subscription cover all three. "Website" means atomicmail.io and atomicvpn.io with all their sub-domains; Content means the Input you provide to Atomic Chat and the Output it returns; Seed Phrase means the recovery phrase issued at registration.
Atomic Chat has no access to your mailbox. It cannot read or manage your messages, and no setting, integration or permission can give it that access. The Atomic Mail Account signs you in and lets you move between the Services; it is not a bridge between them. Section 3 is a binding commitment, not a description of current practice.
Terms specific to Atomic VPN are in the Atomic VPN Service Terms, an annex at atomicvpn.io/terms that forms part of this agreement and prevails on VPN matters only. Our Privacy Policy explains how we handle personal data and also forms part of it.
You accept these Terms by creating an Account or using any Service; if you do not accept them, do not use the Services. This agreement runs indefinitely until terminated. If you are a consumer, the mandatory consumer-protection rules of your country apply on top of these Terms and nothing here limits them.
1. Users of the Services
You must be old enough to use the Services where you live. The minimum age is set by the law of your country and differs from one country to another; where an individual Service carries a higher requirement of its own, we say so in that Service. If you have not reached the age of majority where you live, a parent or legal guardian must agree to these Terms on your behalf and is responsible for use of the Account, including any purchases made through it. If you are a parent or legal guardian who allows a minor to use the Services, these Terms apply to you and you are responsible for that use.
Registration creates one Atomic Account: an email address and a password meeting the requirements shown at sign-up. The name you give need not be your real name, but you accept responsibility for the consequences of using a pseudonym. An Account belongs to one person; a business may use the Services for its staff, but the Account holder remains responsible for everything done under the Account. Accounts, email addresses and aliases are cryptographically bound to their creator and cannot be sold, traded or transferred. Keep your password and any sign-in codes to yourself and tell us promptly if you believe someone else has access; activity carried out with your credentials is deemed to be yours, except where it results from our own failure.
Atomic Mail and Atomic Chat can be used only with an Atomic Account. We offer no sign-in with Google, Apple or any other identity provider for them, because your mailbox is bound to credentials that only you hold. Atomic VPN additionally accepts registration and sign-in with Apple or Google; an account created that way is a VPN-only account, with no Atomic Mail address, no Seed Phrase and no access to Atomic Mail or Atomic Chat.
At registration you receive a Seed Phrase. It is the only means of recovering access if your password is lost.
If you lose both your password and your Seed Phrase, recovery is impossible by design. We cannot restore access, cannot recover your mailbox, and are not liable for any resulting loss. A VPN-only account has no Seed Phrase and is recovered through Apple or Google instead.
Official communications about your Account are delivered to your Atomic Mail inbox, so keep it accessible. Other messages are sent only if you opt in, and you can unsubscribe at any time.
2. Authorized use of the Services
You may use the Services for any lawful purpose, in compliance with applicable law and with any guidelines, usage policies or limits we publish.
You may not use Atomic Mail for illegal purposes, fraud, abuse, Spam, or the violation of anyone's rights. "Spam" means unsolicited commercial or charitable email sent to recipients who have not given prior informed consent. We apply technical and behavioural limits against Spam and infrastructure misuse, with thresholds undisclosed for security reasons, and may immediately terminate an Account involved in prohibited activity and retain the relevant evidence.
In Atomic Chat, you may not infringe anyone's rights; copy, sell or distribute the Service except as an open-source licence allows; reverse-engineer or attempt to discover the source code or underlying components of our models or systems, except where applicable law forbids us to prevent it; extract Output programmatically outside an interface we provide; represent Output as human-written when it is not; disrupt the Service or circumvent its rate limits, authentication, billing or safety measures; use Output to develop competing models; or attempt to obtain, infer or reconstruct mailbox content through Atomic Chat.
Atomic Chat may let you connect external accounts you own, such as cloud storage, a workspace tool or a third-party mailbox. Each integration is off until you complete that provider's own authorisation flow, and you can disconnect it at any time; data retrieved at your instruction is treated as Input. Atomic Mail is not available as an integration and cannot be added as one; connecting a third-party mailbox grants access to that mailbox only.
We may suspend or terminate access to any or all Services if you breach these Terms or our published policies, if we are legally required to, or if your use could cause risk or harm to Atomic, our users or anyone else. Where a breach concerns a single Service we normally limit suspension to it, and except where a breach is serious or immediate action is needed we will warn you first. If you believe we acted in error, write to support@atomicmail.io. You may terminate this agreement at any time, without giving reasons, using the account termination control in the Website or the applications.
3. Separation of Services
Atomic Chat cannot read, search, index, summarise, send, forward, delete, archive, label, export or otherwise access or manage any message, draft, attachment, contact, alias, folder or setting in your Atomic Mail Account. No interface, API, connector, integration or permission exists through which it could, and no such access can be enabled — by you, by us, or by a third party.
Encrypted Mail content is stored under an encryption model we cannot open; Chat Content is stored separately. Neither is readable from, derived from, or used to personalise the other, and the Services exchange no content, embeddings, indexes, metadata or derived signals about you. A shared Account is not a shared pool of data: the shared layer holds only your account identifier, your credentials and sessions, your subscription status, your account-level settings and your VPN device list.
Atomic Mail's own AI features are not Atomic Chat. They operate within Atomic Mail; Atomic Chat plays no part in them and receives no data from them.
Atomic VPN carries traffic; it does not read it. While connected it transports whatever your device sends, which may include your use of Atomic Mail and Atomic Chat — that is what a VPN is. The contents are encrypted between your device and the Service, and no connection record is created at all, so there is nothing to attribute to your Account, join to your mailbox, or pass to Atomic Chat. Using Atomic VPN is never required in order to use the other Services.
If you copy text or upload a file from your mailbox into Atomic Chat, you place it there by your own act; from that moment it is Input, handled under the Atomic Chat rules rather than the Atomic Mail encryption model.
Any future feature connecting these Services would be strictly opt-in, off by default, would require your separate explicit action, and would be preceded by the notice in Section 11. Terminating your Account terminates every Service reached with it.
4. Inactive accounts
We do not delete accounts for inactivity. Your Account, your mailbox and your data remain available for as long as you keep the Account, whether you sign in daily or once every few years, and whether you pay or not. We may contact you about an Account that has been dormant for a long time, but we will not use dormancy as a reason to delete your mail.
This does not affect our right to suspend or terminate an Account under Section 2, or your own right to terminate it.
5. Limited warranties and liability
The Services are provided "as is" and "as available". To the extent permitted by law, we and our affiliates and licensors disclaim all warranties, whether express, implied or statutory, including merchantability, fitness for a particular purpose, satisfactory quality, non-infringement and quiet enjoyment. We do not warrant that the Services will be uninterrupted, accurate or error-free, that any particular feature, server or protocol will be available at a given moment, or that Content will be secure, unaltered or recoverable.
Atomic Chat produces Output probabilistically. Output may be inaccurate, incomplete or offensive, does not represent our views, and does not imply endorsement where it names third-party products. Do not rely on it as a sole source of truth or as a substitute for professional advice; evaluate it, with human review where appropriate, before using or sharing it; and do not use Output relating to a person for any purpose with a legal or material effect on them, such as decisions about credit, education, employment, housing, insurance, legal matters or health. Use of Output is at your sole risk.
Nothing in these Terms limits our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, for gross negligence or intent, or for anything else that cannot be limited by law. Subject to that, we are not liable for indirect or consequential loss, for lost profits, revenue, business, goodwill or data, or for loss you could have avoided by following these Terms or taking reasonable care. Our total liability arising out of the Services in any 12-month period is limited to the amount you paid us for the Services in that period, a series of connected events counting as one.
If you are a consumer, we are liable for foreseeable loss caused by our failure to meet these Terms, and this Section limits our liability only so far as consumer law permits; your statutory rights are unaffected. We are not liable for failures caused by events beyond our reasonable control.
6. Service level agreement
We do not offer a service level agreement. We work to keep the Services available, fast and correct, and we treat outages as serious, but we make no commitment to a level of uptime, to a response or restoration time, and we offer no service credits or compensation for downtime. Paid Subscriptions do not change this: priority support, where a plan includes it, means faster handling in the support queue than free users receive, not a guaranteed response time.
We may update, modify or temporarily suspend a Service for maintenance, security or legal reasons, keeping such interruptions as short as we reasonably can, and we may add, change or withdraw features. If a change materially reduces what your paid plan offers, we will tell you in advance and you may cancel and receive a refund of the unused part of your term, subject to Section 10 where a store took payment. If we discontinue a Service altogether, we will give at least 30 days' notice and refund the unused part of any term you have paid for.
7. Indemnification
If you are a business or an organisation, you will indemnify and hold harmless Atomic, our affiliates and our personnel against any costs, losses, liabilities and expenses, including legal fees, arising from third-party claims relating to your use of the Services or Content, or to your breach of these Terms, to the extent permitted by law.
If you are a consumer, you indemnify us against third-party claims for compensation, costs or interest arising from your own use of the Services, again only to the extent permitted by applicable law.
8. Privacy
How we handle personal data is set out in our Privacy Policy, which forms part of this agreement. In summary: Atomic Mail content is encrypted so that we cannot read it; Atomic VPN records nothing about what you do while connected; and Atomic is entirely ad-free.
Nothing you do in Atomic Chat is used to build a picture of you. We do not profile you and do not infer interests, traits or behaviour from your conversations, from your usage, or from anything in Atomic Mail. We do not use your Content to train, fine-tune or evaluate AI models, ours or anyone else's. We sell and target no advertising anywhere in the Services. The only personalisation is the optional profile you fill in yourself, which contains exactly what you typed and which you can edit or delete at any time.
Nor can anyone else assemble that picture from what we send onward. Each provider sees only what a single feature sends, for a single request or conversation: nothing from Atomic Mail, nothing from Atomic VPN and nothing from your other conversations is added to it, because the Services do not pool their data (Section 3). What travels carries no name, no Atomic Mail address and no account identifier, so there is nothing in it that links one request to another or to you. Profiling needs a stable identifier, continuity between requests and data from more than one context; the architecture withholds all three, which is a stronger guarantee than a promise, because it does not depend on our good behaviour.
With that established: most Atomic Chat features do send your Input to a third-party AI provider, because a model must process it in order to answer. Those providers act as our processors under contracts limiting them to providing the service to us and prohibiting use of your Content for their own purposes, including advertising and model training. This transmission is part of delivering the Service rather than a separate permission we ask for; your control is which features you use, and a feature you do not use transmits nothing. Our Privacy Policy names the categories of data sent and the current providers. No Atomic Mail content is ever sent to them.
We comply only with requests from Estonian judicial authorities, after our lawyers verify a request is valid and we are satisfied compliance is undeniably our legal obligation. We refuse requests from other countries' authorities and refer them to the Estonian authorities for mutual assistance, never cooperate with voluntary surveillance programmes, and disclose nothing to private third parties without a valid Estonian court order. What we can produce is bounded by our architecture: mailbox content is encrypted beyond our reach, our logs are short-lived, and no valid order compels data we do not hold.
9. Intellectual property
We and our affiliates own all rights in the Services, our software, our Website and the Atomic names and logos, except for components released under open-source licences. These Terms give you the right to use the Services and nothing more, and you may use our name and logo only in accordance with our brand guidelines. Your own content remains yours: you retain ownership of your Input, and we assign to you whatever rights we may have in the Output. Output may not be unique, and that assignment does not extend to other users' output or to third-party output.
We grant you a personal, limited, non-exclusive, non-transferable and revocable licence to install and use our applications and extensions on devices you own or control, for as long as your Account is in good standing. You may not copy, modify, translate, rent, lease, sell, sublicense or distribute our software, remove its notices, or reverse-engineer it, except where applicable law gives you that right or an open-source licence grants you more. Updates may install automatically, including security fixes, and an outdated version may leave features unable to work. Third-party software and output included in the Services carry their own terms, for which we are not responsible. Feedback you send us we may use freely.
If you believe your intellectual property rights have been infringed by material we are able to access, write to support@atomicmail.io with your signature, a description of the work and of where the material is, your contact details, a statement of your good-faith belief that the use is unauthorised, and a statement under penalty of perjury that you are the owner or authorised to act for the owner. We may remove or disable material we believe to be infringing and will terminate repeat infringers where appropriate. This procedure cannot reach private email content, which we are unable to access.
10. Terms of payment
Paid Subscriptions are optional and the core free Services carry no fee. A subscription attaches to your Atomic Account rather than to a single Service, so one purchase unlocks the paid features of Atomic Mail, Atomic Chat and Atomic VPN together. Current plans, their contents and their prices are shown on our pricing page and in the app stores, and any tax we must collect is stated at checkout.
Payment is taken by us through Stripe, or by Apple or Google where you subscribe inside an application. They handle payment details under their own policies, and full card numbers never reach us.
Subscriptions renew automatically for the same period, at the price then in force, until you cancel. If you subscribed through us, cancel in your Account settings before the renewal date; if you subscribed inside an iOS or iPadOS application, in your Apple Account subscription settings at least 24 hours before the period ends; on Android, in Google Play subscriptions, on the same timing. For store purchases the charge is taken within the 24 hours before the period ends, and turning off auto-renewal there is the only way to stop it — deleting an application, or deleting your Atomic Account, does not cancel a store subscription. We give at least 30 days' notice of a price change, which applies only from your next renewal so that you can cancel first. If a payment fails we may retry it and may suspend paid access until it succeeds.
Right of withdrawal. If you are a consumer in the European Economic Area or the United Kingdom and bought directly from us, you have 14 days from the start of your subscription to withdraw. Because the Services begin working immediately, you ask us to begin performance at once; if you then withdraw, we refund what you paid less a proportionate amount for the part of the period already served. Write to support@atomicmail.io within those 14 days and we will process it within 14 days, using the payment method you used.
Otherwise, cancelling stops the next renewal and your plan runs to the end of the period already paid for; we do not pro-rate a term you choose to end early. Purchases made in the App Store or Google Play are refunded by Apple or Google under their own policies — we cannot refund money we never received or override a store's decision, though we will support your request to them, and where these Terms promise a refund of an unused term it comes from the store that took payment. Beyond these cases we will still refund you where a Service was materially not what we described, or where your local law requires it. A premium alias suspended for abuse is not refunded.
Apple App Store. Where you download one of our applications from the App Store or subscribe inside it, the following also applies: this agreement is between you and us alone, and Apple is not a party to it and is not responsible for the application or its content; your licence is limited to Apple-branded products you own or control, as permitted by the App Store Terms of Service; we, not Apple, are responsible for maintenance and support, which Apple has no obligation to provide; if the application fails to conform to an applicable warranty you may notify Apple, which may refund the purchase price, and beyond that refund Apple has no warranty obligation, any other resulting claim being our responsibility; we, not Apple, answer claims concerning product liability, regulatory compliance, consumer protection and intellectual-property infringement; you confirm that you are not located in a country subject to a United States Government embargo or designated as terrorist-supporting, and are not on any United States Government prohibited or restricted-party list; you must comply with any applicable third-party terms; and Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you.
Google Play. Where you download from Google Play or subscribe inside it, Google Play's terms apply alongside these, Google takes payment and handles refunds under its own policies, subscriptions are managed and cancelled in Google Play, and Google is not a party to this agreement and is not responsible for the application or the Services.
11. Modifications to these Terms
We may update these Terms or the Services — for example because the law or regulatory requirements change, for security or safety reasons, because of circumstances beyond our reasonable control, in the ordinary course of developing the Services, or to adapt to new technologies. We will publish the new version and update the date at the top.
For changes that materially and adversely affect you, we will give at least 30 days' notice by email or by an in-product notification before they take effect, and you may terminate before then if you do not accept them. Other changes take effect when we post them. Any change that would weaken Section 3 is material by definition. Continuing to use the Services after a change takes effect means you accept it.
12. Severability
If any provision of these Terms is found to be invalid or unenforceable, it will be enforced to the maximum extent permissible and the remaining provisions will stay in full force. Our failure to enforce a provision immediately is not a waiver of our right to enforce it later.
13. Applicable law, language and disputes
These Terms are governed by Estonian law, without regard to its conflict-of-laws rules. If you are a consumer, this choice does not deprive you of the protection of the mandatory rules of the country you live in, and you may bring proceedings in your own country's courts; otherwise the courts of Tallinn have exclusive jurisdiction.
Talk to us first — most problems are resolved faster by email than by anything else. Write to support@atomicmail.io, and we both agree to attempt informal resolution for 60 days before either of us takes the matter further. Consumers in Estonia may refer a dispute to the Consumer Disputes Committee at the Consumer Protection and Technical Regulatory Authority; consumers elsewhere in the European Union can find their national body through the European Consumer Centre network. Using such a body is voluntary and does not affect your right to go to court.
There is no mandatory arbitration, no class action waiver and no jury trial waiver in these Terms. Any such provision in a predecessor service's terms is superseded in full.
The English version governs; a translation is provided for convenience only.
14. Miscellaneous
You may not assign or transfer your rights or obligations under these Terms, and any attempt to do so is void; we may assign ours to an affiliate, subsidiary or successor in interest of the business associated with the Services, and will tell you if that happens.
You must comply with all applicable trade laws, including the sanctions and export-control laws of the European Union, Estonia and any other jurisdiction applying to you. The Services may not be used in or for the benefit of an embargoed country or territory, or by a restricted party, and your Input may not include material requiring a government licence for export.
We send notices to the email address on your Account. These Terms, with the Privacy Policy, the Atomic VPN Service Terms and any other Service-specific terms we publish, are the entire agreement between us concerning the Services and supersede anything said before.
Questions: support@atomicmail.io · AtomicMail Systems OÜ, Harju tn 3 // Vana-Posti tn 2, Tallinn 10146, Estonia
