Legal

Terms of Service

Last updated: 13 November 2026

1. Who we are and what these terms cover

Vynthen ("Vynthen", "we", "us") operates the Vynthen App (chat), Vynthen Build (website and app generation), the VYN command-line agent, and the related websites, APIs, wallets and integrations available at vynthen.com, app.vynthen.com and build.vynthen.com (together, the "Services"). We are established in Addis Ababa, Ethiopia. You can reach us at hello@vynthen.com.

These Terms are a binding agreement between you and Vynthen. By creating an account, signing in with GitHub or Google, or using any Service, you accept these Terms and our Privacy Policy. If you do not accept them, do not use the Services.

2. Eligibility, accounts and security

You must be at least 18 years old, or use the Services under the supervision and consent of a parent or legal guardian who agrees to these Terms on your behalf. You must have the legal capacity to enter into a contract under Ethiopian law.

You are responsible for the accuracy of your account information, for keeping your credentials and connected accounts secure, and for all activity under your account. Do not share your account or resell access. Tell us immediately at security@vynthen.com if you suspect unauthorised access. We may suspend an account to protect the Services or other users.

You may sign in with a Vynthen password or with GitHub or Google. Where you use a third-party sign-in, you authorise us to receive the profile information and scopes you approve, and you remain bound by that provider's terms.

3. The Services and AI-generated output

Vynthen provides access to artificial-intelligence models, code generation, file workspaces, previews and a command-line agent. Model output is probabilistic and may be inaccurate, incomplete or unsuitable for your purpose. You must review and test all output before relying on it, especially for legal, medical, financial, security or production use. Vynthen does not provide legal, medical, financial or other professional advice.

We may change, limit or discontinue features, models or plans. We will give reasonable notice of material changes where practicable. Beta or experimental features are provided as-is and may be withdrawn.

4. Acceptable use

You must not use the Services to:

• commit or facilitate an offence under the Criminal Code of the Federal Democratic Republic of Ethiopia, the Computer Crime Proclamation No. 958/2016, the Communications Service Proclamation No. 1148/2019, or any other applicable law;
• access, alter or interfere with systems, data or accounts without authorisation, distribute malware, conduct denial-of-service attacks, or evade security controls;
• violate the privacy, reputation or intellectual-property rights of any person, including by generating or distributing unlawful, defamatory, harassing, hateful or exploitative content;
• create or distribute sexual content involving minors, content that incites violence, or content that promotes terrorism or other serious harm;
• send spam, run unauthorised automated scraping, bypass usage quotas, rate limits, plan restrictions or the Vynthen watermark, or resell the Services without our written permission;
• use the Services for high-risk activities where failure could cause death, personal injury, or severe environmental or financial harm; or
• reverse engineer, decompile or attempt to extract the source code of proprietary parts of the Services, except as expressly permitted by law or by an applicable open-source licence.

We may remove content, restrict access, or report conduct to competent Ethiopian authorities where we believe in good faith that this is necessary to comply with the law or prevent harm.

5. The "Made with Vynthen" mark and integrity checks

Projects created in Vynthen Build include a "Made with Vynthen" mark and an integrity check. The mark must remain present and functional. Vynthen's hosted preview enforces the mark server-side, and exported or downloaded projects include a client-side check that disables the page if the mark is removed. You must not remove, hide, disable or alter the mark or its integrity check, or attempt to circumvent them. Doing so is a material breach of these Terms and may result in suspension and disabling of the affected previews or exports.

6. GitHub and Google integrations

Build and App can connect to GitHub, Google Gmail, Google Drive and Google Calendar when you authorise them. You control the scopes you grant and may revoke access at any time in the provider's settings. Authorising GitHub permits Vynthen to create repositories, commit files and read repository metadata on your behalf as described at the time of authorisation. You are responsible for repository ownership, licences, secrets and any code committed under your account. Google data is used only to provide the features you request, in accordance with the Google API Services User Data Policy, including its Limited Use requirements.

7. Your content and intellectual property

You retain ownership of the prompts, files and other content you submit ("Your Content"). You grant Vynthen a non-exclusive, worldwide licence to host, process, transmit and display Your Content solely to operate and improve the Services, comply with law, and provide support. You represent that you have the rights needed to submit Your Content and to grant this licence.

Subject to your rights in Your Content and the rights of third parties, you may use output generated for you. Vynthen and its licensors own the Services, the Vynthen name, logos, interface and proprietary code. Open-source components are governed by their respective licences.

8. Plans, wallet, payments and taxes

Paid plans are offered in Ethiopian Birr (ETB). Vynthen uses a prepaid wallet funded by Telebirr transfers that are verified by our team. Activating a paid plan requires at least three months of the plan price in your wallet; the first month is charged when the plan activates and subsequent months are charged monthly until you cancel or the balance is insufficient. Prices may change with notice; changes apply to future billing periods.

Except where required by Ethiopian consumer-protection law (including the Consumer Protection Proclamation No. 813/2013), payments are non-refundable once a plan has been activated. You are responsible for any taxes applicable to you. Vynthen is responsible for its own taxes, including value-added tax and income tax under applicable Ethiopian law. Where required, we will issue receipts or tax documents. Fraudulent, reversed or unauthorised transfers may lead to suspension and recovery of credited balances.

9. Availability, warranties and limitation of liability

The Services are provided on an "as available" basis. To the maximum extent permitted by Ethiopian law, we disclaim implied warranties of merchantability, fitness for a particular purpose and non-infringement. We do not warrant uninterrupted or error-free operation, or that output will meet your requirements.

To the maximum extent permitted by law, Vynthen is not liable for indirect, incidental, special, consequential or punitive damages, or for lost profits, data, goodwill or business interruption. Our total aggregate liability arising out of or relating to the Services in any twelve-month period is limited to the amount you paid to Vynthen for the Services in that period, or ETB 5,000, whichever is greater. Nothing in these Terms limits liability that cannot lawfully be limited, including liability for fraud or for death or personal injury caused by negligence.

10. Indemnity

You will indemnify and hold harmless Vynthen, its directors, employees and contractors from claims, losses, liabilities and reasonable costs arising from Your Content, your use of the Services in breach of these Terms or applicable law, or your connected accounts, except to the extent caused by Vynthen's own negligence or wilful misconduct.

11. Suspension and termination

You may stop using the Services at any time. We may suspend or terminate access if you materially breach these Terms, if required by law or a competent authority, or if your use poses a security or legal risk. Where reasonable, we will give notice and an opportunity to export Your Content. On termination, your right to use the Services ends; sections that by their nature should survive (including intellectual property, disclaimers, liability and governing law) survive.

12. Privacy

Our Privacy Policy explains what personal data we collect, how we use it, and your rights. It forms part of these Terms.

13. Governing law and disputes

These Terms are governed by the laws of the Federal Democratic Republic of Ethiopia. The parties will first try to resolve any dispute amicably within 30 days by written notice to legal@vynthen.com. If unresolved, the dispute will be submitted to the competent courts of Addis Ababa, without prejudice to mandatory consumer-protection rights or any right to seek urgent injunctive relief.

14. Changes and general

We may update these Terms. Material changes will be announced on the Services or by email before they take effect. Continued use after the effective date constitutes acceptance. If a provision is found invalid or unenforceable, the remaining provisions continue in full force. Our failure to enforce a provision is not a waiver. These Terms and the Privacy Policy are the entire agreement between you and Vynthen regarding the Services. The English version controls; any translation is provided for convenience.

15. Contact

Questions about these Terms: legal@vynthen.com. General support: hello@vynthen.com. Postal contact: Vynthen, Addis Ababa, Ethiopia.