Terms of Use
Effective 19 August 2026 · Applies to the Sendant mobile app (io.sendant) and web client.
These Terms explain the rules for using Sendant. Please read them together with our Privacy Policy.
1. Who provides Sendant
Sendant ("we", "us") is the Sendant messenger, developed by Yoni Ryabinski (yoniryabinski.com). You can reach us about these Terms at privacy@sendant.io.
2. Eligibility — 18 and over
Sendant is rated 18+ and is intended solely for adults. By using Sendant you represent that you are at least 18 years old, that you can agree to these Terms, and that nothing in the law that applies to you prevents you from doing so. Sendant is not directed to children, and we do not knowingly permit anyone under 18 to use it. If we learn that a user is under 18 we will terminate their access.
You accept these Terms in the app itself: on first launch — and again whenever these Terms materially change — Sendant shows the Community Standards and will not run until you tap I agree.
3. Your account and device keys
Sendant does not use a phone-number account by default. Your identity is based on cryptographic keys generated and stored on your device. You are responsible for your device, recovery materials, and any activity from your Sendant identity. If you lose access to your device or recovery materials, we may not be able to restore your messages or identity.
4. Acceptable use — zero tolerance
There is no tolerance for objectionable content or abusive users on Sendant. Objectionable content includes, without limitation, harassment and bullying, hate speech and slurs, threats of violence, sexual content involving minors, non-consensual intimate images, sexually explicit material sent to someone who did not ask for it, and scams or spam. Sending any of it is a breach of these Terms, and we will remove the content we can reach and permanently eject the sender.
You may not use Sendant to:
- Violate the law or someone else's rights.
- Threaten, harass, exploit, abuse, or endanger another person.
- Share child sexual abuse material, non-consensual intimate content, or other unlawful content.
- Send spam, malware, phishing, scams, or deceptive messages.
- Attempt to disrupt, overload, probe, reverse engineer, or gain unauthorized access to Sendant, its infrastructure, or other users' devices.
- Use network-resilience or relay features to evade controls on systems or networks you do not own or are not authorized to use.
5. User content and encrypted messages
You are responsible for the messages, attachments, profile labels, and other content you create or send through Sendant. Sendant is designed so our infrastructure cannot read end-to-end encrypted message contents. That means we generally cannot proactively review private message content, but we may act on reports, metadata, abuse signals, legal process, or service-protection needs where we have enough information to do so.
6. Reporting, blocking, filtering, and what we do about it
Every Sendant client gives you four controls, and you can reach all of them without leaving the app:
- Report — in any chat, open the … menu and tap Report. Choose a reason, add detail, and optionally attach the recent messages you are complaining about. Because we cannot read end-to-end encrypted content, that attachment is the only way evidence reaches us, so it is offered as an explicit opt-in and never sent without it.
- Block — in the same menu, or by long-pressing the chat in your list. A blocked person's messages and calls never reach you again. Every block can be undone in Settings → Privacy & Security → Blocked contacts.
- Filter — Sendant runs an on-device filter over incoming messages and hides likely-objectionable content behind a confirmation before it is displayed. It is on by default and can be adjusted in Settings → Privacy & Security → Content filter.
- Remove — you can delete any individual message, clear an entire conversation, or delete a contact and their history, at any time, and it takes effect on your device immediately.
Our commitment: a person reviews every abuse report within 24 hours of receipt. Where a report is substantiated we remove the reported content from any Sendant infrastructure that still holds it and permanently eject the user who sent it. Ejection denies that identity every service we operate: it can no longer publish or be discovered through our key directory, no longer deposit mail to anyone or fetch its own, and no longer receive wake notifications. Because call setup also travels through the mailbox, an ejected identity cannot place or receive calls either. What we cannot do is reach the copies of a message already delivered to someone's device — end-to-end encryption puts those beyond us, and we will not pretend otherwise. Ejection is permanent and is not appealable for child sexual abuse material, credible threats of violence, or repeat harassment.
You can also reach a person directly at hello@sendant.io or through the form at sendant.io/feedback; both go to the same monitored mailbox. Do not include sensitive message content in an email unless you choose to disclose it to us for review.
7. Privacy and security limits
Sendant is built for end-to-end encrypted, local-first messaging, but no service can guarantee perfect security, anonymity, availability, or delivery. Your device, operating system, app stores, push providers, network providers, and message recipients may affect your privacy and security. People you message can copy, screenshot, or forward content they can see.
8. Service changes and availability
Sendant is an early-stage service. Features may change, break, disappear, or be unavailable. We may modify, suspend, or discontinue any part of Sendant, including relay, mailbox, notification, or web-client features.
9. No paid terms yet
Sendant is currently offered without in-app purchases, subscriptions, or paid accounts. If paid services are added later, we will provide additional terms before you buy them.
10. Intellectual property
Sendant, its branding, website, app interface, and service components are protected by intellectual-property laws. These Terms do not give you ownership of Sendant or our branding. You keep ownership of content you create, subject to the limited rights needed to transmit, store, deliver, display, and operate that content as part of the service.
11. Third-party services
Sendant depends on third-party platforms and providers, such as app stores, operating systems, hosting providers, and Firebase Cloud Messaging for Android wake notifications. Their terms and policies may also apply to your use of those services.
12. Termination
You may stop using Sendant at any time. We may limit or terminate access to Sendant if we believe you violated these Terms, created risk for others, or threatened the service's integrity, security, or availability. Sending objectionable content or abusing another user results in permanent ejection, as described in section 6, and we do not require a pattern of behaviour before acting.
13. Disclaimers
Sendant is provided "as is" and "as available." To the maximum extent allowed by law, we disclaim warranties of merchantability, fitness for a particular purpose, non-infringement, uninterrupted operation, perfect security, and guaranteed message delivery.
14. Limitation of liability
To the maximum extent allowed by law, we will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost data, lost profits, service interruption, or unauthorized access arising from or related to Sendant.
15. Governing law
These Terms are governed by the laws of Pennsylvania, excluding conflict-of-law rules. Venue and dispute terms should be reviewed by counsel before broad launch.
16. Changes
If we change these Terms, we will update the effective date above and, for material changes, surface a notice in the app or on this page. Continuing to use Sendant after changes become effective means you accept the updated Terms.
Questions about these Terms? Email privacy@sendant.io. To report abuse, email hello@sendant.io or use the in-app report flow described in section 6.