Silentum

Legal

Terms and Conditions

Last updated: 15 June 2026

SyannuAI Technologies Private Limited

Effective Date: 15 June 2026 | Last Updated: 15 June 2026

Version 1.1

1. PARTIES, FORMATION, AND BINDING EFFECT

These Terms and Conditions of Service ("Agreement") constitute a legally binding contract between you ("User", "you", or "your") and SyannuAI Technologies Private Limited, a company incorporated under the Companies Act, 2013, with its registered office in Bangalore, Karnataka, India ("Company", "we", "us", or "our").

The Company operates the Silentum mobile application ("App") and associated services at www.silentumai.com (collectively, the "Platform"). By downloading, installing, registering for, or using the Platform in any manner, you agree to be bound by this Agreement, our Privacy Policy, Cookie Policy, Copyright Policy, and Disclaimer Policy, each incorporated herein by reference.

If you are accepting on behalf of a legal entity, you represent that you have authority to bind that entity. All references to "you" shall include that entity.

This Agreement supersedes all prior oral or written representations with respect to the Platform.

2. ELIGIBILITY AND AGE REQUIREMENTS

We reserve the right to verify eligibility and to terminate without notice any account held or used by a person who does not meet these requirements.

  • You must be at least 13 years of age to use the Platform.
  • Users under 13 are strictly prohibited and may not register or use the Platform under any circumstances.
  • Users aged 13 to 17 must have the prior consent of a parent or legal guardian who has reviewed this Agreement and our Privacy Policy.
  • Users under 18 resident in India must ensure verifiable parental consent has been provided as required under the Digital Personal Data Protection Act, 2023.
  • You must have the legal capacity to enter into a binding contract in your jurisdiction.
  • You must not be subject to a legal prohibition on receiving services under applicable law.

3. DESCRIPTION OF SERVICES

Silentum provides the following end-to-end encrypted communication services ("Services"):

  • Encrypted voice calling between registered users;
  • Encrypted video communication between registered users;
  • Encrypted one-to-one and group messaging;
  • Encrypted file sharing (documents, images, videos, audio files, and attachments);
  • Voice messages and rich media features including emoji and sticker support;
  • Self-destructing messages with user-configurable retention periods (immediate, 10 minutes, 1 hour, 24 hours);
  • Burn-on-read messaging (immediate deletion upon message being read);
  • Panic PIN enabling immediate, irreversible erasure of all local messages, contacts, and call history;
  • Proof-of-Life device-interaction-based access security;
  • Trusted contact model and contact synchronisation;
  • Account management, privacy settings, and language configuration.

4. ACCOUNT REGISTRATION AND SECURITY

Services are provided on an as-is basis. The Company reserves the right to modify, add, suspend, or discontinue any feature with reasonable notice where practicable.

4.1 Accurate Registration Information

You agree to provide accurate, current, and complete registration information including your display name, email address (for account recovery), and phone number (for contact synchronisation). You will maintain and promptly update this information if it changes.

4.2 Account Credentials and Responsibility

You are solely responsible for maintaining the confidentiality of your PIN, password, and account credentials. All activity under your account is your responsibility. You must not share credentials with any third party. If you suspect unauthorised access, you must notify us immediately at legal@silentum.app.

4.3 Account Recovery

Account recovery is facilitated solely via your registered email address. The Company cannot recover lost PINs or passwords without a valid recovery email. Loss of access due to failure to maintain a valid recovery email is solely your responsibility.

4.4 No Multiple Accounts for Evasion

You may not create or operate multiple accounts to circumvent suspension, a ban, or any enforcement action taken by the Company. All associated accounts may be terminated.

5. ACCEPTABLE USE POLICY

5.1 Prohibited Conduct

The Platform may be used only for lawful communication purposes. You agree not to:

  • use the Platform for any illegal, unlawful, or unauthorised purpose in any jurisdiction;
  • transmit, share, store, or facilitate child sexual abuse material ("CSAM") in any form. This is an absolute prohibition. Violation will result in immediate account termination and mandatory reporting to the appropriate law enforcement authorities, including NCMEC where applicable;
  • use the Platform to plan, facilitate, finance, recruit for, promote, or incite terrorism, violent extremism, or mass violence in any form;
  • harass, threaten, stalk, intimidate, bully, defame, abuse, or impersonate any person;
  • send spam, bulk unsolicited messages, or use the Platform for commercial solicitation without recipients' consent;
  • transmit malware, spyware, ransomware, viruses, Trojan horses, or any malicious code;
  • attempt to gain unauthorised access to any user account, system, or network;
  • reverse engineer, decompile, disassemble, or attempt to extract the source code of the App;
  • circumvent, disable, or interfere with any security feature of the Platform including end-to-end encryption;
  • use the Platform to violate the intellectual property rights of any third party;
  • use the Panic PIN or data destruction features to destroy evidence relevant to ongoing or anticipated legal proceedings where such destruction constitutes obstruction of justice or contempt of court under applicable law;
  • use the Platform in any manner that could disable, overburden, damage, or impair the Platform or interfere with any other party's use of it;
  • engage in any activity that facilitates human trafficking, exploitation, non-consensual intimate image sharing, or any other category of conduct criminalised under applicable law;
  • misrepresent your identity or affiliation with any person, entity, government, or organisation;
  • use the Platform in violation of applicable export control laws or sanctions regulations.

5.2 User Responsibility for Content

You are solely responsible for all content you create, transmit, or share through the Platform. The Company does not access the content of end-to-end encrypted communications and therefore cannot and does not moderate communication content in real time. This does not limit our right to investigate account-level prohibited conduct and take enforcement action.

5.3 No Safe Harbour for Illegal Use

The end-to-end encryption of the Platform does not provide a safe harbour for illegal activity. The Company will cooperate with lawful authority requests and will report credible evidence of serious crimes, including CSAM and terrorism, to the appropriate authorities to the full extent required by applicable law.

6. END-TO-END ENCRYPTION AND SECURITY FEATURES

All calls, messages, and file transfers on the Platform are end-to-end encrypted. This means:

  • The content of your communications cannot be accessed, read, or decrypted by the Company. We do not hold decryption keys.
  • We cannot provide communication content in response to any legal request, regardless of source, because we do not technically possess it.
  • The security of your communications depends on the security of both your device and the devices of your contacts.

You are responsible for maintaining the security of the device on which the App is installed. The Company accepts no liability for unauthorised access to communications arising from a compromise of your device, account credentials, or the device of any person you communicate with.

Use of the Panic PIN results in immediate, permanent, and irreversible destruction of all local messages, contacts, and call history. This process cannot be undone and the Company holds no server-side copies. You use this feature entirely at your own risk and accept full responsibility for any data loss resulting from its activation.

7. OPERATOR OBLIGATIONS AND PLATFORM GOVERNANCE

7.1 Intermediary Status

The Company operates as an intermediary within the meaning of the Information Technology Act, 2000 and the Information Technology (Intermediary Guidelines and Digital Media Ethics Code) Rules, 2021 ("IT Rules"). As an intermediary, we observe due diligence obligations including publication of this Agreement and our Privacy Policy, appointment of a Grievance Officer, and timely response to lawful authority orders.

7.2 Non-Moderation of Encrypted Content

The Company does not and cannot monitor the content of end-to-end encrypted communications. This is a function of our privacy-first architecture. We rely on user reports and account-level signals to identify prohibited conduct. This Policy constitutes clear and accessible notice to users that certain conduct is prohibited, as required under applicable intermediary frameworks.

7.3 Cooperation with Authorities

Notwithstanding our privacy commitments, the Company will cooperate with lawful, valid, and proportionate legal processes issued by competent authorities in accordance with applicable law and our Privacy Policy (Section 7). We will provide account-level data (not communication content) in response to valid legal processes. We will not cooperate with requests that are unlawful, disproportionate, or contrary to our users' fundamental rights.

7.4 Grievance Redressal

The Company has designated a Grievance Officer in compliance with the IT Rules 2021 and the DPDP Act 2023. Contact details are set out in the Privacy Policy (Section 22). We will acknowledge user complaints within 48 hours and resolve them within 30 days.

8. INTELLECTUAL PROPERTY RIGHTS

8.1 Company Ownership

All intellectual property rights in the Platform, including the App, website, brand name Silentum, logo, source code, UI design, and proprietary features, are owned by or licensed to the Company. Nothing in this Agreement transfers any such rights to you.

8.2 Licence to Users

Subject to compliance with this Agreement, the Company grants you a limited, personal, non-exclusive, non-transferable, non-sublicensable, revocable licence to download and use the App on a device you own or control for personal, non-commercial purposes only.

8.3 User Content

You retain all intellectual property rights in content you create, transmit, or share. You do not grant the Company any licence to your content. The Company asserts no ownership over user-generated content transmitted through encrypted channels.

8.4 Restrictions

You may not copy, modify, create derivative works from, sublicence, sell, reverse engineer, or otherwise exploit the Platform except as expressly permitted by this Agreement or mandatory applicable law.

9. PRIVACY

Your use of the Platform is subject to our Privacy Policy, incorporated herein by reference. By using the Platform, you confirm that you have read and understood the Privacy Policy. The Privacy Policy explains how we collect, use, protect, and — in limited lawful circumstances — disclose your personal data.

10. PAYMENT AND FUTURE COMMERCIAL FEATURES

The Platform is currently available free of charge. We reserve the right to introduce paid features or subscription plans. We will provide reasonable advance notice and will not charge you without your express prior consent. Future payment processing may involve Stripe or equivalent third-party processors. All fees will be clearly stated in the App and on our website.

11. THIRD-PARTY SERVICES

The Platform may in the future integrate with or link to third-party services. The Company does not endorse and is not responsible for any third-party service. Your use of third-party services is governed by those parties' own terms. We do not currently integrate with any advertising, analytics, or data sharing service.

12. SERVICE AVAILABILITY AND MAINTENANCE

We will use commercially reasonable efforts to ensure continuous availability. However, we do not guarantee uninterrupted access. The Platform may be unavailable due to: scheduled maintenance (notified in advance where practicable); emergency security maintenance; or circumstances beyond our reasonable control including Force Majeure Events (Section 17). We shall not be liable for unavailability except where caused by our gross negligence or wilful misconduct.

13. DISCLAIMERS AND WARRANTIES

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE PLATFORM IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS. THE COMPANY EXPRESSLY DISCLAIMS: all implied warranties including merchantability, fitness for a particular purpose, and non-infringement; any warranty of uninterrupted, timely, or error-free access; any warranty of freedom from malicious components; and any warranty that encryption will be proof against all present or future cryptographic attacks including state-level adversaries. No oral or written information from the Company creates any warranty not expressly stated herein.

14. LIMITATION OF LIABILITY

14.1 Exclusion of Indirect Loss

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE COMPANY AND ITS DIRECTORS, OFFICERS, EMPLOYEES, AND AFFILIATES SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING LOSS OF DATA, REVENUE, PROFITS, GOODWILL, OR BUSINESS INTERRUPTION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

14.2 Cap on Aggregate Liability

The Company's total aggregate liability shall not exceed the greater of: (a) the amount paid by you to the Company in the 12 months preceding the claim; or (b) INR 1,000 (Rupees One Thousand Only) where no payment has been made.

14.3 Data Loss via User Action

The Company accepts no liability for loss of data resulting from your voluntary use of the Panic PIN, burn-on-read, or self-destruct features. These destroy data permanently on your instruction.

14.4 Saving Provision

Nothing herein excludes or limits liability for: death or personal injury caused by the Company's negligence; fraud or fraudulent misrepresentation; or any other liability that cannot be lawfully excluded.

15. INDEMNIFICATION

You agree to indemnify and hold harmless the Company and its directors, officers, employees, and affiliates from any claim, liability, cost, or expense (including legal fees) arising from: your use of the Platform; your violation of this Agreement; your violation of applicable law or third-party rights; any content you transmit; or any claim by a third party arising from your conduct on the Platform.

16. SUSPENSION AND TERMINATION

16.1 Termination by You

You may terminate this Agreement at any time by deleting your account (Settings > Delete Account) and uninstalling the App.

16.2 Termination by the Company

We may suspend, restrict, or terminate your account at any time, with or without notice, if: you breach this Agreement; you engage in prohibited conduct under Section 5; we receive credible evidence of illegal activity; we are required to do so by applicable law or court order; or your account has been inactive for more than 24 consecutive months.

In cases involving CSAM, terrorism, or other serious crimes, account termination may occur without prior notice and may be accompanied by mandatory reporting to relevant authorities.

16.3 Effect of Termination

Upon termination, your licence to use the Platform immediately ceases. Sections 8, 13, 14, 15, 18, 19, 20, 21, and 24 survive termination.

17. FORCE MAJEURE

The Company shall not be liable for any failure or delay caused by events beyond our reasonable control, including acts of God, natural disasters, pandemic, epidemic, war, civil unrest, governmental actions, embargoes, labour disputes not involving our workforce, telecommunications infrastructure failure, or other Force Majeure Events. We will notify you promptly and resume performance as soon as reasonably practicable.

18. EXPORT CONTROLS AND SANCTIONS COMPLIANCE

You agree to comply with all applicable export control laws and economic sanctions regulations, including those of India, the United States, the European Union, and the United Kingdom. You represent that you are not located in, or a national or resident of, any country or territory subject to a comprehensive trade embargo, and are not listed on any government denied-party or sanctions list.

The end-to-end encryption and security features of the Platform may be subject to export control regulations in certain jurisdictions. By using the Platform, you confirm compliance with all applicable export laws. You may not use or export the Platform in violation of any such regulations.

19. GOVERNING LAW

This Agreement is governed by and construed in accordance with the laws of the Republic of India, without regard to conflict of law principles. The parties submit to the exclusive jurisdiction of the courts at Bangalore, Karnataka, India, subject to the arbitration provisions in Section 20 and to the extent mandatory consumer protection law in your jurisdiction requires otherwise. EU and UK users retain rights to bring disputes before courts in their country of habitual residence under applicable consumer law.

20. DISPUTE RESOLUTION AND ARBITRATION

We encourage you to contact legal@silentum.app first to attempt informal resolution. If unresolved within 30 days of written notice, the dispute shall be referred to and finally resolved by arbitration under the Arbitration and Conciliation Act, 1996 (as amended), before a sole arbitrator mutually appointed by the parties. Seat: Bangalore, India. Language: English. The award shall be final and binding.

Either party may seek interim or injunctive relief from any court of competent jurisdiction. Class actions, collective actions, and representative proceedings are waived to the maximum extent permitted by applicable law.

21. CHANGES TO THIS AGREEMENT

We may modify this Agreement at any time. Material changes will be communicated via in-app notification and/or email not less than 14 days before taking effect. Your continued use of the Platform after the effective date constitutes acceptance of the revised Agreement. If you do not accept a material change, you must discontinue use and may delete your account.

22. NOTICES

Company notices to you will be by in-app notification or email to your registered address. Notices to the Company must be sent to legal@silentum.app or by registered post to SyannuAI Technologies Private Limited, Bangalore, Karnataka, India.

23. ASSIGNMENT, WAIVER, AND SEVERABILITY

You may not assign this Agreement without our prior written consent. We may assign it in connection with a merger, acquisition, or asset sale, with notice. No failure to exercise a right constitutes a waiver. If any provision is found invalid, it shall be modified to the minimum extent to make it valid or severed, and the remainder shall continue in full force.

24. ENTIRE AGREEMENT

This Agreement, together with the Privacy Policy, Cookie Policy, Copyright Policy, and Disclaimer Policy (each as amended), constitutes the entire agreement between you and the Company with respect to the Platform and supersedes all prior communications and agreements on the same subject matter.

25. CONTACT INFORMATION

Legal and Compliance: legal@silentum.app

Privacy: privacy@silentum.app

Grievance Officer: privacy@silentum.app

Registered Address: SyannuAI Technologies Private Limited, Bangalore, Karnataka, India

We aim to respond to legal and compliance enquiries within 5 business days.

These Terms and Conditions are issued by SyannuAI Technologies Private Limited. For enquiries: legal@silentum.app.