Terms and Conditions of Service

ZEVO JOINT STOCK COMPANY — Zevo AI, the AI Employee Platform

Effective Date: September 9, 2026 · Last Updated: September 9, 2026 · Version 1.0

Published at: https://zevohq.ai/legal/terms (Vietnamese version: https://zevohq.ai/vi/legal/terms)

This English version governs for Customers outside Vietnam. For Customers in Vietnam, the Vietnamese version at https://zevohq.ai/vi/legal/terms prevails in case of any discrepancy. This translation is provided for reference.

These Terms consolidate and supersede the following separately issued documents: Procedure for receiving and resolving feedback, requests and complaints (Articles 23–24); Pricing Policy (Article 9); Payment Policy (Articles 10–16); Terms and restrictions on the supply of goods and services on the platform (Articles 2–3, 6–8, 22); Service delivery, termination and refund policy (Articles 4–5, 16–21, 25–28). The substance of those documents is preserved and reorganised into the structure below. The Privacy and Personal Data Protection Policy (https://zevohq.ai/legal/privacy) and the Refund Policy (https://zevohq.ai/legal/refunds) are published separately and form an integral part of these Terms.

Part A. General provisions

Article 1. Introduction and scope

1.1. These Terms and Conditions of Service (the "Terms") govern the Customer's registration for, access to and use of the Zevo AI Service provided by ZEVO JOINT STOCK COMPANY ("Zevo AI", "we", "us").

1.2. Zevo AI provides an AI employee platform that helps businesses receive, answer and manage customer messages across channels such as Facebook, Zalo, TikTok and websites, including 24/7 online chat, advisory, order-closing support, appointment booking and daily KPI reports. The Service is supplied subject to terms and restrictions designed to ensure transparency, fairness and legal compliance, and to protect the interests of both the user of the Service (the Customer) and the provider (Zevo AI).

1.3. These Terms apply to all Customers using the Zevo AI Service, including trial and paying Customers.

1.4. By registering for or continuing to use the Service, the Customer confirms that it has read, understood and agreed to be fully bound by these Terms together with the Privacy and Personal Data Protection Policy.

Article 2. Conditions of use

2.1. Eligibility

• The Customer must be a business or an individual with full legal capacity and civil act capacity to enter into a contract.
• The Customer must be at least 18 years old (or the age of majority under applicable local law).

2.2. Account conditions

• The Customer must register a Zevo AI account and provide accurate, complete and up-to-date information.
• The Customer must keep its login credentials secure and is responsible for all activity arising from its account. Zevo AI will never ask the Customer to provide a credit card number or password by email or telephone.

2.3. Third-party platform connections

• To use the full features of the Service, the Customer must connect third-party accounts (Facebook Page, Zalo Official Account, TikTok Business Account, Google Calendar).
• The Customer must hold all rights and authorisations required to make those connections under each platform's rules.

2.4. Payment conditions

• The Customer must pay all fees for the subscribed plan in full and on time.
• Zevo AI may refuse to provide or may suspend the Service if the Customer does not pay on time, following the procedure in Articles 14 and 8 of these Terms.

Article 3. End-customer personal data

3.1. The Customer is the Data Controller for the personal data of end customers introduced into the Service; Zevo AI processes that data as a Data Processor acting on the Customer's instructions.

3.2. The Customer must ensure it has a valid legal basis under the Law on Personal Data Protection (including the data subject's consent where required) before introducing end-customer personal data into the Service, and must publish its own data protection policy to its end customers.

3.3. Details of the collection, use, sharing, retention and deletion of personal data are set out in the Privacy and Personal Data Protection Policy at https://zevohq.ai/legal/privacy.

Part B. How the Service is provided

Article 4. Form and process of service delivery

4.1. Form of delivery

Zevo AI provides the Service as Software as a Service (SaaS). The Customer accesses and uses the Service through:

• The website: https://zevohq.ai
• A mobile application (if any)
• An API for developers, if and when officially released by Zevo AI.

The Customer does not need to install or maintain software on a personal computer; all features are operated and hosted on Zevo AI's servers and those of its authorised cloud service providers.

4.2. Service delivery process

• Step 1 – Account registration: the Customer visits the Zevo AI website and creates an account with an email address and password, or signs in with a Google/Facebook account. The Customer must provide accurate, complete and up-to-date information.
• Step 2 – Plan selection: the Customer reviews the plans published at https://zevohq.ai/pricing and selects the plan that suits its needs (Free, Trial or Paid).
• Step 3 – Payment (paid plans): the Customer provides a payment method and pays through our partner Polar (Merchant of Record). Invoices are issued in accordance with Article 13.
• Step 4 – Activation and use: after successful registration or payment, the Customer's account is activated with the entitlements of the relevant plan. The Customer may then connect third-party accounts (Facebook Page, Zalo Official Account, TikTok Business Account, Google Calendar) and use the features of the Service.
• Step 5 – Support and maintenance: Zevo AI provides technical and operational support throughout the subscription. The scope of support and response times are determined by the plan the Customer has subscribed to (as published on the website and in the user documentation). The Customer may contact support@zevohq.ai for assistance.

Article 5. Availability, maintenance and interruption

5.1. Availability and commencement

• The Service is provided 24/7 throughout the subscription term, except during maintenance or force majeure events.
• Paid plans: the Service begins upon successful payment.
• Free trial plans: the Service begins upon successful registration.

5.2. Scheduled maintenance

Zevo AI may carry out scheduled maintenance to upgrade, update or fix the system. We will endeavour to notify the Customer of maintenance windows in advance by email or in-product notice.

5.3. Unplanned interruption

If an unplanned service interruption occurs due to a technical fault or a force majeure event, we will use our best efforts to restore the Service as soon as possible.

5.4. Exclusion of liability

Zevo AI is not liable for any damage arising from service interruption, except where that damage results from our wilful misconduct or gross negligence.

Article 6. Restrictions on the supply of the Service

6.1. Geographic restrictions

Zevo AI provides the Service globally; however, access to and use of the Service may be restricted in certain countries or territories due to local law or trade embargoes. The Customer is responsible for ensuring that its use of the Service complies with local law.

6.2. Term and supply cycle restrictions

• The Service is supplied on the subscription cycle (monthly or annual) that the Customer has subscribed to.
• Zevo AI may suspend or cease supplying the Service in the following cases: system maintenance, technical faults, natural disaster, epidemic, or other force majeure events.
• Where a suspension is planned, Zevo AI will notify the Customer in advance.

6.3. Feature and usage-volume restrictions

• Each plan carries specific limits on the number of messages, conversations, API requests or other usage metrics.
• Where the Customer exceeds the limits of its plan, Zevo AI may:
  • Temporarily restrict or refuse further service until the Customer upgrades its plan or pays the additional fees;
  • Charge additional fees for the excess at the prevailing rates. However, Zevo AI will charge those additional fees only after clearly notifying the Customer of the overage and the applicable fee, and only with the Customer's prior consent, in accordance with Article 9.4 of these Terms.

6.4. Restrictions on supported customers and content

• The Zevo AI Service does not support industries or lines of business prohibited or restricted by law (such as narcotics, weapons, products contrary to public morality, etc.).
• Zevo AI may refuse to supply the Service or terminate the contract if it discovers that the Customer is using the Service for unlawful purposes, in breach of intellectual property rights, or in breach of the terms of use of a third-party platform.

Article 7. Restrictions relating to third-party platform integrations

7.1. Dependence on third-party policies

• The availability of integrations with Facebook, Zalo and TikTok depends on those platforms' terms, policies and APIs.
• Zevo AI is not liable if a third-party platform changes its policies, restricts or discontinues API access, resulting in interruption or loss of Service functionality.

7.2. Risk of third-party restriction

If Meta (Facebook), VNG (Zalo), TikTok or any other third-party platform restricts, suspends or terminates the Customer's access (or Zevo AI's access on the Customer's behalf), the related features will be unavailable. Zevo AI is not liable for that loss of functionality.

Article 8. Right to refuse, suspend or restrict the Service

8.1. Zevo AI may refuse to supply, or may suspend, restrict or terminate the Service, in the following cases:

• The Customer breaches these Terms, the Privacy Policy or related policies;
• The Customer uses the Service to commit unlawful acts, harassment, fraud, distribution of malware or spam, or other unlawful content;
• The Customer misrepresents, impersonates or provides false information;
• The Customer fails to pay fees on time after having been notified;
• Zevo AI receives a request from a competent state authority or from a third-party platform (Meta, Zalo, TikTok);
• Continuing to supply the Service creates a security or legal risk for Zevo AI, other users or third parties.

8.2. As a general rule, Zevo AI will notify the Customer in advance of the reason and the measure taken, except in emergencies where prior notice is not possible. In the case of late payment, Zevo AI will apply the notice-and-cure procedure set out in Article 14.2 of these Terms. Immediate suspension without prior notice applies only in emergencies involving cyber security, serious legal risk, or a mandatory request from a competent state authority or a third-party platform.

Part C. Pricing, payment and refunds

Article 9. Pricing

9.1. Service plans

• Free trial: Zevo AI may offer free trial programmes with the duration and features determined from time to time. Trial details are published on the website or during registration.
• Paid plans: access to certain features of the Service requires a paid subscription.
• Advanced plans: for businesses needing more AI employees or extended features, Zevo AI offers advanced plans at different price points. Please refer to the detailed price list on the website or contact the sales team.

9.2. Price publication

Specific prices and plan details are published and updated at https://zevohq.ai/pricing (the "Price List"), which is the authoritative source at any given time. For Customers in Vietnam, prices are listed in Vietnamese Dong (VND) on the Price List (the VND amount corresponds to the USD price converted at the exchange rate applied by the card issuer or payment provider at the time of payment). The Customer is responsible for reviewing the Price List before subscribing.

9.3. Right to change prices

• Zevo AI may change service prices and related payment terms.
• Any price change will be notified to the Customer at least 30 (thirty) days before it takes effect.
• Price changes take effect at the start of the Customer's next billing cycle.
• If the Customer does not agree to the new price, the Customer may cancel its subscription before the change takes effect, in accordance with Article 18.

9.4. Additional fees

In addition to the base subscription fee, additional fees may arise in the following cases:

• Usage exceeding the plan's permitted limits (for example messages, conversations or API requests above the cap);
• Premium features or integrations activated separately;
• Custom services or in-depth support.

Such additional fees (if any) will be clearly notified before they arise and must be agreed by the Customer before Zevo AI charges them.

9.5. Other charges

• Third-party service charges: where the Customer uses integrations with third-party platforms (such as Facebook, Zalo, TikTok, etc.), the Customer may incur separate charges set by those platforms. Zevo AI is not responsible for those charges.
• Transaction fees: any transaction fees will be clearly notified before the Customer makes a payment.

Article 10. Payment methods

10.1. Accepted payment methods

Zevo AI authorises Polar Software, Inc. ("Polar") to process payment transactions. The list of available payment methods (including credit/debit cards, bank transfer, e-wallets or other forms) is determined by Polar and by the Customer's region and is displayed in full on the checkout screen in the Zevo AI application before the Customer confirms the subscription or payment. We may update or change the list of methods at any time without prior notice, but will always ensure the Customer sees the valid options before completing a transaction.

10.2. Merchant of Record

All payment transactions are processed through Polar, our authorised Merchant of Record. Specifically:

• Polar is the party principally responsible, legally and financially, for collecting payment information, processing transactions, issuing invoices and providing payment support on behalf of Zevo AI.
• We never receive or store the Customer's credit card number, CVV code or any sensitive payment information on Zevo AI systems. All card information is collected and stored securely by Polar on PCI DSS-compliant systems.
• When the Customer visits the billing area of its Zevo AI account, we display only summary information about the stored card (card brand and last four digits) and the list of invoices. That information is retrieved from Polar and displayed only; it is not stored by Zevo AI.

10.3. Payment authorisation

When the Customer provides a payment method and subscribes to a paid plan, the Customer formally authorises Polar — as Merchant of Record — to:

• Store the Customer's payment method securely on PCI DSS-compliant systems;
• Automatically charge the registered payment method for all applicable fees, taxes and renewal charges;
• Update the payment method details where the card issuer provides updated information (for example when a card expires and is reissued).

Zevo AI does not store card numbers, CVV codes or any sensitive payment information on its systems. All card information is processed and held by Polar in accordance with Articles 10.2 and 15.1.

10.4. Payment authentication

To protect the Customer against fraudulent transactions, we and Polar may apply additional authentication measures, including but not limited to:

• 3D Secure authentication (Verified by Visa, Mastercard SecureCode, etc.);
• Identity or billing address verification;
• A small temporary hold to verify the card (subsequently released).

Refusing or failing to complete these authentication steps may result in the transaction being declined.

Article 11. Billing cycle and automatic renewal

11.1. Billing cycle

• Paid subscriptions are charged on the cycle selected by the Customer at registration, usually monthly or annually.
• The first billing cycle starts on the date the Customer successfully subscribes to a paid plan, or upgrades from a free or other plan to a paid plan.
• The monthly/annual billing date follows the cycle start date. For example, if the Customer subscribes on 15 January, the next cycle begins on 15 February (monthly) or 15 January of the following year (annually).

11.2. Automatic renewal

Unless the Customer cancels before the end of the current term, the subscription renews automatically for successive terms of the same length. Specifically:

• The renewal fee is charged automatically to the registered payment method on the renewal date (or within a few days thereafter).
• We will send a reminder of the upcoming renewal before the renewal date (typically 7–14 days).

11.3. Suspension for failed renewal

If the Customer does not cancel and the payment method cannot be charged for the renewal, we may suspend or restrict access to the Service until payment is made, following the procedure in Article 14.

Article 12. Free trial

12.1. Trial offering

Zevo AI may offer free trials of some or all paid-plan features for a limited period.

12.2. Conversion to a paid plan

• At the end of the free trial, the plan converts automatically to the corresponding paid subscription unless the Customer has cancelled beforehand.
• The fee for the first paid cycle is charged on the day the trial ends or the following day.

12.3. Notice before the trial ends

We undertake to send the Customer a reminder before the trial period ends (typically 3–7 days beforehand) so that the Customer has time to decide whether to continue.

12.4. Cancelling during the trial

• If the Customer does not wish to continue to a paid service, please cancel before the trial ends through account settings.
• Cancellation during the trial takes effect immediately, the Customer is not charged, and access ends when the trial period ends (or immediately if the Customer cancels earlier).

12.5. If charged after the trial

If the Customer is charged after the trial without intending to continue (for example, having forgotten to cancel), please refer to Article 16 to request a refund within 14 days.

12.6. Right to modify or withdraw a trial

We may modify, shorten or withdraw any free trial programme at any time without prior notice, at our discretion.

Article 13. Taxes and invoices

13.1. Tax responsibility

• Fees listed on our website are exclusive of applicable taxes (including VAT/GST and other consumption taxes), unless expressly stated otherwise.
• The Customer is responsible for paying all taxes, duties and government charges relating to its use of the Service, including taxes we are obliged to collect.
• Taxes based on Zevo AI's net income are Zevo AI's responsibility.

13.2. Tax exemption

If the Customer is tax-exempt, it must provide us (or Polar) with a valid exemption certificate issued by the competent tax authority before the transaction is made. We will apply the exemption to future transactions after verifying the certificate.

13.3. Invoices

• Payment invoices are issued by Polar (Merchant of Record) as the seller. Invoices are available for download in the billing area of the Zevo AI account after each successful transaction.
• Invoices include: invoice number, issue date, buyer and seller details, service description, amount, tax rate and tax amount (if any).
• Business customers in Vietnam who require a valid electronic VAT invoice under Vietnamese law should contact our support team at support@zevohq.ai for guidance on the process and on the tax registration details to be provided.

13.4. Accurate billing information

The Customer is responsible for ensuring that billing information (including company name, address and tax code) is accurate and up to date. We are not liable for any error arising from inaccurate information provided by the Customer.

Article 14. Late payment and debt handling

14.1. What counts as late payment

A payment is treated as late when:

• The authorised payment method cannot be charged successfully on the due date;
• The Customer does not update the payment method after a card expires or is cancelled;
• The transaction is declined by the bank or payment service provider for any reason.

14.2. Measures

In the event of late payment, we may apply one or more of the following measures:

• Suspension or restriction of access: temporarily suspending or restricting the Customer's access to the Service until payment is made in full.
• Reminder notice: sending an email asking the Customer to update the payment method or make payment within a set period (typically 7–14 days).
• Late payment interest: applying late payment interest in accordance with applicable law. In all cases, that interest rate will not exceed the ceiling prescribed by Vietnamese law for similar transactions.
• Debt recovery: using other lawful debt recovery measures, including but not limited to engaging a third party or bringing legal proceedings.

14.3. Restoring the Service

Once the debt is paid in full (including fees and any late payment interest), we will restore the Customer's access to the Service as soon as possible.

Article 15. Security of payment information

15.1. Security commitments

• No storage of sensitive information: Zevo AI does not store credit card numbers, CVV codes or any sensitive payment information on its systems.
• Processing by a trusted partner: all card information is collected and processed directly by Polar, certified as compliant with the Payment Card Industry Data Security Standard (PCI DSS).
• Encryption in transit: all payment information is transmitted over connections encrypted with TLS (Transport Layer Security), ensuring the data cannot be intercepted or tampered with in transit.

15.2. Account protection

In addition to technical measures, the Customer is responsible for protecting its own login credentials. Do not share your password or Zevo AI account details with anyone. Zevo AI will never ask the Customer to provide a credit card number or password by email or telephone.

15.3. Breach notification

In the event of a security incident affecting the Customer's payment information, we will notify the Customer and the competent authorities in accordance with applicable law.

Article 16. Refund policy

16.1. The Customer may request a refund within 14 (fourteen) days of the date of successful payment for an initial or renewal paid subscription.

16.2. The refund conditions, request process, cases in which no refund is given, processing times and related situations (subscription cancellation, conversion from a free trial, breach by Zevo AI) are set out in full in the Refund Policy published at https://zevohq.ai/legal/refunds. The Refund Policy forms an integral part of these Terms.

16.3. Refunds are processed by Polar (Polar Software, Inc.), Zevo AI's Merchant of Record, and returned to the original payment method.

16.4. The refund policy does not apply to overage charges or fees for custom services.

Part D. Termination

Article 17. Forms of termination

Provision of the Service may be terminated in the following ways:

Article 18. Termination at the Customer's request (cancellation)

18.1. Right to cancel

The Customer may cancel a paid subscription at any time through account settings in the Zevo AI application, or by sending a request to support@zevohq.ai.

18.2. When cancellation takes effect

• Cancellation takes effect at the end of the current billing cycle.
• The Customer retains full access to the Service until the end of the current billing cycle.
• The Customer will not be charged for subsequent cycles.
• The Customer will not be refunded for the remaining part of the current cycle, unless a refund is due under Article 16.

18.3. Cancelling during a free trial

The Customer may cancel at any time during the trial. Cancellation takes effect immediately and the Customer is not charged.

Article 19. Termination for breach

19.1. Breach by the Customer

Zevo AI may terminate the Service immediately (without prior notice) if the Customer commits a material breach, including but not limited to:

• Breaching the acceptable-use provisions in Articles 6.4 and 8 of these Terms;
• Using the Service for unlawful, fraudulent, deceptive or harmful purposes;
• Misrepresenting identity or impersonating another person or organisation;
• Infringing the intellectual property rights of Zevo AI or a third party;
• Endangering the system, the security or the operation of the Service;
• Failing to pay fees on time after notice and an opportunity to cure under Article 14.2.

19.2. Breach by Zevo AI

• If Zevo AI materially breaches its core obligations under these Terms and fails to cure within 15 days of receiving written notice from the Customer, the Customer may terminate the contract.
• In that case, the Customer will be refunded the fee corresponding to the unused portion of the current billing cycle.

Article 20. Force majeure and temporary suspension

20.1. Termination for force majeure

• If a force majeure event (natural disaster, war, epidemic, government action, network failure, etc.) persists and makes provision of the Service impossible, either party may terminate the contract.
• The affected party will notify the other party as soon as possible.

20.2. Right of temporary suspension

Zevo AI may temporarily suspend (rather than permanently terminate) provision of the Service if:

• Usage is detected that creates a safety or legal risk;
• A request is received from a competent state authority or from Meta, Zalo or TikTok;
• Unscheduled maintenance or system upgrade is required.

The suspension will be lifted as soon as the cause is resolved.

Article 21. Consequences of termination

On termination of the Service:

• Access: the Customer's right to use the Service ends immediately (for termination for breach) or at the end of the cycle (for cancellation on request).
• Data deletion: Zevo AI will delete or anonymise Customer Content (including data from connected accounts) within 30 days of termination, unless the law requires longer retention. Technical backup arrangements are described in Section 7 of the Privacy Policy.
• Payment obligations: all fees incurred before termination remain payable in full.
• Surviving provisions: provisions on confidentiality, intellectual property, limitation of liability, indemnity and dispute resolution survive termination.

Part E. Liability and dispute resolution

Article 22. Limitation of liability

22.1. The limitations of liability in this Article do not apply to damage arising from Zevo AI's wilful misconduct or gross negligence, or in cases where Vietnamese law does not permit liability to be limited or excluded.

22.2. To the extent permitted by law, Zevo AI is not liable for:

• Any indirect, incidental, special or consequential damage arising from the use of, or inability to use, the Service;
• The accuracy, completeness or suitability of any AI-generated content. The Customer is responsible for reviewing and verifying AI outputs before use;
• Interruption or failure of the Service caused by third parties (including but not limited to internet outages, cloud provider failures, incidents affecting Meta, Zalo or TikTok, and force majeure events).

Article 23. Receiving and resolving feedback, requests and complaints

23.1. This Article sets out how customer feedback, requests and complaints (together, "Consumer" or "Customer" submissions) relating to the use of the Zevo AI Service are received and resolved, in order to protect the Customer's lawful interests and to comply with the Law on Protection of Consumer Rights 2023 and its implementing instruments.

23.2. Principles

• Transparency: all feedback, requests and complaints are received and resolved openly, transparently and in accordance with the process.
• Timeliness: requests are handled within reasonable deadlines that protect the Customer's interests.
• Objectivity and fairness: every complaint is considered objectively, on the basis of the law and the agreement between the parties.
• Confidentiality: all information relating to a complaint, and the Customer's personal data, is kept confidential in accordance with the Zevo AI Privacy Policy.

23.3. Intake channels

Note: for complaints relating to payment and refunds, please refer to Article 16 of these Terms; the Customer may also contact the payment processor Polar where necessary. For matters relating to personal data, the Customer may exercise the rights set out in Section 9 of the Privacy Policy.

23.4. Resolution process

• Step 1 – Intake: the Customer submits feedback, a request or a complaint through one of the channels in Section 23.3. To allow prompt and accurate handling, please provide: full name and the email address linked to the Zevo AI account; a detailed description of the issue; any supporting evidence or documents; and the specific outcome sought.
• Step 2 – Acknowledgement and classification: within 02 (two) business days of receipt, we will acknowledge the submission and assign a priority. Submissions are classified as: (i) feedback and suggestions; (ii) support requests; and (iii) complaints affecting the Customer's interests, including service quality, payment, data security and breach of contract.
• Step 3 – Investigation and verification: the responsible team will examine and verify the information and assess the extent of any breach on the basis of these Terms and the Privacy Policy. For complex matters, we may contact the Customer for further information.
• Step 4 – Proposed resolution and notification: we will propose a resolution consistent with the law and the agreed terms. The outcome is notified formally to the Customer by email or through the channel the Customer used.
• Step 5 – Follow-up and review: after notifying the outcome, we will monitor implementation of the resolution and the Customer's satisfaction. The Customer may respond to the outcome; if the Customer disagrees, it may pursue the routes in Article 24.

23.5. Resolution deadlines

Where an extension is needed because of the complexity of the matter, we will notify the Customer before the deadline expires and state the reason.

Article 24. Dispute resolution

24.1. Support first

If the Customer has any query, complaint or dispute relating to invoices, payments or fees, please contact our support team first at support@zevohq.ai. We undertake to resolve matters promptly and in good faith. For matters relating directly to a payment transaction (for example a declined transaction or an incorrect charge), the Customer may also contact Polar directly through its support channels.

24.2. Other dispute resolution routes

If the Customer disagrees with Zevo AI's resolution, or the submission is not resolved within the stated deadline, the Customer may pursue the following routes, consistent with applicable law:

• Negotiation: continuing to negotiate directly with Zevo AI to find a suitable solution.
• Mediation: requesting a commercial mediation body or competent authority to conduct mediation in accordance with the law.
• Arbitration: referring the dispute to commercial arbitration by agreement of the parties.
• Court: bringing proceedings before the court having jurisdiction under Vietnamese civil procedure law. A consumer has the right to choose the court of their place of residence in accordance with the law.
• Complaint to a state authority: a consumer may submit a complaint to the National Competition Commission (Ministry of Industry and Trade) or other competent authorities.

Part F. Final provisions

Article 25. Assignment

• The Customer may not assign the contract or its rights and obligations under it to a third party without Zevo AI's prior written consent.
• Zevo AI may assign the contract to an affiliate, or in connection with a merger, acquisition or sale of assets, without the Customer's consent.

Article 26. Governing language

The Service and related documents (these Terms and the Privacy and Personal Data Protection Policy) are provided primarily in Vietnamese. The English translation (where provided) is for reference only; in the event of any discrepancy between the two versions, the Vietnamese version prevails for Customers in Vietnam.

Article 27. Changes to these Terms

27.1. Zevo AI may amend, supplement or update these Terms from time to time to reflect changes in the Service, the law or its business operations.

27.2. Any change will be published on the website with an updated "Last updated" date and/or notified to the Customer by email, with the following notice periods: 30 days for changes that are adverse to the Customer (including fee changes, under Article 9.3) and 14 days for other changes.

27.3. Continued use of the Service after the effective date of a change constitutes acceptance of the amended Terms. If the Customer does not agree to the changes, the Customer may cancel its subscription before the effective date.

Article 28. Effectiveness

These Terms take effect on September 9, 2026 and apply to all transactions from that date. Previous versions and the separate documents consolidated into these Terms cease to have effect from that date.

Article 29. Contact

• General support / billing: support@zevohq.ai
• Legal / complaints: legal@zevohq.ai
• Privacy / personal data: privacy@zevohq.ai
• Address: ZEVO JOINT STOCK COMPANY, No. 32, Lane 100 Doi Can, Ngoc Ha Ward, Hanoi City, Vietnam.