Last updated: October 30, 2025
Effective date: November 1, 2025
Version: 1.0

Article 1 (Purpose)

These Terms and Conditions (hereinafter referred to as "Terms") are established to prescribe the rights, obligations, responsibilities, and other necessary matters between deltai Technologies Inc. (hereinafter referred to as "the Company") and users regarding the use of the AI agent platform service (hereinafter referred to as "Service") provided by the Company.

Article 2 (Definitions)

The terms used in these Terms are defined as follows:

1. "Service" refers to the AI agent building, execution, management platform and all related services provided by the Company.
2. "User" or "Member" refers to an individual or corporation that agrees to these Terms and enters into a service usage contract with the Company to use the Service.
3. "Account" refers to the unique identification information created by the user using an email address as an ID.
4. "Credit" refers to the virtual payment unit used to measure AI model usage within the service.
5. "Membership" refers to the subscription plan selected by the user (Free Trial, Agent Starter, Agent Pro, Agent Master, Agent Enterprise).
6. "Subscription" refers to the periodic payment method selected by the user for monthly or annual service usage.

Article 3 (Posting and Amendment of Terms)

1. The Company shall post the contents of these Terms on the service website (https://www.deltai.chat) and the initial screen of the app so that users can easily know them.
2. The Company may amend these Terms without violating related laws such as the "Act on Consumer Protection in Electronic Commerce, Etc.", "Act on the Regulation of Terms and Conditions", and "Act on Promotion of Information and Communications Network Utilization and Information Protection, Etc."
3. When the Company amends the Terms, it shall indicate the effective date and reasons for amendment, and announce them together with the current Terms on the service initial screen from 7 days before the effective date. However, in case of amendments unfavorable to users, they shall be announced 30 days before the effective date and individually notified by email.
4. When the Company announces or notifies amendments to the Terms pursuant to the preceding paragraph, if it clearly informs that consent is deemed given unless the user expresses objection before the effective date of the amendment, and the user does not explicitly express objection, consent to the amended Terms shall be deemed given.
5. If the user does not accept the application of the amended Terms, the Company or the user may terminate the service usage contract.

Article 4 (Rules Beyond Terms)

1. For matters not stipulated in these Terms and interpretation of these Terms, related laws such as the "Act on Consumer Protection in Electronic Commerce, Etc.", "Act on the Regulation of Terms and Conditions", "Act on Promotion of Information and Communications Network Utilization and Information Protection, Etc." or commercial practices shall apply.
2. The Company may establish and operate separate usage terms or policies for specific services as necessary, and if such content conflicts with these Terms, the separate terms shall take precedence.

Article 5 (Membership Registration and Account Creation)

1. Users wishing to use the Service must fill out the membership information according to the registration format prescribed by the Company and express their intention to agree to these Terms to apply for membership registration.
2. Users create accounts using email addresses as IDs.
3. The Company shall register as members those users who apply to become members pursuant to Paragraph 1, unless they fall under any of the following numbers:
   • Cases where the applicant has previously lost membership qualification due to these Terms (except when 3 years have passed since the loss of membership qualification and the Company's approval for membership re-entry has been obtained)
   • Cases where the registered content contains falsehoods, omissions, or errors
   • Other cases determined to cause significant technical obstacles to the Company if registered as a member
4. The time of formation of the membership registration contract shall be based on the time when the Company's approval reaches the user.
5. When the information registered at the time of membership registration changes, the member must notify the Company of such change within a reasonable period through methods such as membership information modification.

Article 6 (Provision and Change of Service)

1. The Company provides the following services:
   • AI agent building and management platform
   • Ontology-based self-evolving AI system
   • MCP(Model Context Protocol) tool integration
   • Credit-based AI model usage service
   • Project and workspace management tools
   • Collaboration and team management functions
   • Other services additionally developed by the Company or provided through partnership contracts
2. The Service is provided 24 hours a day, 365 days a year in principle. However, the Company may temporarily suspend the provision of the Service when reasons such as inspection, maintenance, replacement, failure, or communication interruption of service equipment occur.
3. The Company may change all or part of the services provided for operational or technical necessity. The relevant content shall be announced within the service before the change.
4. If the content of the service change pursuant to Paragraph 3 is significant or unfavorable to users, the Company shall notify users individually by email or other methods.

Article 7 (Suspension of Service)

1. The Company may suspend the provision of the Service when any of the following numbers apply:
   • When reasons such as maintenance, inspection, replacement, or failure of service equipment, communication interruption occur
   • When various equipment obstacles or usage explosion cause obstacles to normal service use due to power outages
   • When various circumstances of the Company such as termination of contract with service partner companies prevent maintenance of the service
   • When force majeure circumstances such as natural disasters or national emergencies exist
2. In case of service suspension pursuant to Paragraph 1, the Company shall notify in advance through service announcements or emails. However, if prior notification is impossible due to reasons uncontrollable by the Company or emergency situations, notification may not be given.

Article 8 (Membership and Subscription)

1. The Company provides users with membership plans such as Free Trial, Agent Starter, Agent Pro, Agent Master, Agent Enterprise.
2. The specific content of each membership (price, credits, functions provided, etc.) is posted on the Company's official website (https://www.deltai.chat) and may be changed.
3. Paid membership users can choose between monthly subscription or annual subscription:
   • Monthly Subscription: Automatic payment based on monthly join date
   • Annual Subscription: One-time payment of 1 year amount at the time of joining, automatic credit refill based on monthly join date
4. The subscription renews automatically and continues unless the user cancels it separately.
5. The Company may change the membership plan prices and benefits. Users shall be notified by email at least 30 days before the change.

Article 9 (Payment and Fees)

1. Paid membership users pay the fees for the selected plan through credit cards, debit cards, or other payment methods prescribed by the Company.
2. In case of monthly subscription, payment is made automatically on the monthly join date (if the payment date does not exist in that month, the last day of the month).
3. In case of annual subscription, the 1 year amount is paid in one lump sum at the time of joining, and credits are automatically refilled based on the monthly join date.
4. In case of payment failure, the Company provides a 7-day grace period, and if payment is not completed within the grace period, service usage may be restricted.
5. Usage fees may be changed according to the Company's policy, and shall be announced at least 30 days before the change.

Article 10 (Credit System)

1. The Company manages AI model usage through a credit-based system.
2. 1 credit (CR) has a value of $0.002, and credits are deducted according to input/output tokens when using the AI model.
3. Monthly credits do not carry over to the next month, and are refilled with new credits at each monthly subscription renewal.
4. When credits are exhausted, the user can purchase additional credits or upgrade to a higher tier plan.
5. When activating the additional credit auto-recharge function, when credits reach 0, 25,000 CR ($50) will be automatically recharged. However, the monthly limit ($150 basic) applies.

Article 11 (User's Obligations)

1. Users shall not engage in the following acts:
   • Registering false content at the time of membership registration or change
   • Stealing others' information
   • Unauthorized alteration of information posted by the Company
   • Transmitting or posting information outside what is prescribed by the Company (computer programs, etc.)
   • Infringing intellectual property rights such as copyrights of the Company and third parties
   • Damage to the reputation of the Company and third parties or obstruction of business
   • Publishing or disclosing obscene or violent messages, images, sounds, or other information that violates public order and morals in the service
   • Using the service for commercial purposes
   • Performing or encouraging illegal acts through the service
   • Exploiting technical vulnerabilities such as system hacking, cracking, service abuse
   • Using automated means to cause negative effects on the service
   • Other illegal or inappropriate acts
2. Users must comply with the provisions of these Terms, usage guides, and attention notices related to the service announced, and must not perform other acts that obstruct the Company's business.
3. Users are responsible for the management of accounts and passwords, and must not allow third parties to use their accounts.

Article 12 (Account and Password Management)

1. Users are responsible for the management of accounts and passwords, and must not allow third parties to use them.
2. If the Company discovers that a user's account is being used improperly, it may restrict the service usage of that account.
3. If the user discovers that their account and password have been stolen or are being used by third parties, they must immediately notify the Company and follow the Company's instructions.
4. In the case of Paragraph 3, if the user does not notify the Company of the fact, or although notified does not follow the Company's instructions, the Company shall not be responsible for any disadvantages incurred.

Article 13 (Company's Obligations)

1. The Company shall not engage in acts prohibited by related laws and these Terms or that violate public order and morals, and shall do its best to provide services continuously and stably as stipulated in these Terms.
2. The Company must equip security systems to protect users' personal information (including credit information). It publishes and complies with the personal information processing policy.
3. The Company equips the necessary personnel and systems to properly process users' complaints or damage compensation requests related to service usage.
4. The Company must process opinions or complaints presented by users related to service usage if they are deemed justified. If processing requires time, it must inform the user of the reason and processing schedule.

Article 14 (Personal Information Protection)

1. The Company complies with the provisions of related laws such as the "Act on Promotion of Information and Communications Network Utilization and Information Protection, Etc." and "Personal Information Protection Act" to protect users' personal information.
2. The Company establishes a personal information processing policy to protect users' personal information and publishes it on the service initial screen.
3. The Company shall not be responsible for personal information exposed due to the user's negligence.

Article 15 (Usage Restriction and Contract Termination)

1. If the user violates the obligations of these Terms or obstructs the normal operation of the service, the Company may restrict service usage step by step through warnings, suspensions, permanent terminations, etc.
2. The Company may immediately permanently terminate usage in the following cases:
   • When others' service ID and password are stolen
   • When service operation is deliberately obstructed
   • When the registered name is not the real name
   • When the same user registers repeatedly with other IDs
   • When content that deliberately violates public order and morals is disseminated
   • When others' reputation is damaged or disadvantage is caused
   • When a large amount of information or advertising information is sent to obstruct stable service operation
   • When computer virus programs that induce malfunction of telecommunications equipment or destruction of information are disseminated
   • When the Company's or other members' or third parties' intellectual property rights are infringed
   • When others' personal information or account information is collected
   • When automated means (bots, scripts, etc.) are used to improperly use the service
3. When the Company takes usage restriction measures due to the user's violation of these Terms, it must notify the user of the content of such measures in advance. However, in emergency situations or when there are unavoidable reasons for not being able to notify the user, notification may be made afterwards.
4. The user may object to the usage restrictions of this Article according to the procedure prescribed by the Company. If the Company deems the user's objection justified, it must immediately restore service usage.

Article 16 (Termination of Usage Contract)

1. Users may request termination of the usage contract at any time through the account settings menu within the service. The Company processes it according to related laws, etc.
2. When monthly subscription users request termination:
   • Automatic renewal stops immediately
   • All services can be used until the end of the month
   • Proportional refund is provided according to days of use
3. When annual subscription users request termination:
   • Within 14 days after joining: Full refund
   • After 14 days of joining: Only automatic renewal stops, service can be used until expiration date (no refund)
4. When the usage contract is terminated, except for cases where user information is retained according to related laws and personal information processing policy, user information shall be deleted.

Article 17 (Refund Policy)

1. For detailed content of the refund policy, please refer to the Company's official website (https://deltai.chat/policy/refund) and the separate refund policy document.
2. In case of monthly subscription, proportional refund of the current month is provided, calculated considering days of use and credits used.
3. In case of annual subscription, full refund is guaranteed within 30 days, after 30 days only automatic renewal can be stopped.
4. Refund requests are accepted through customer service (support@deltai.chat), and processed within 7 business days.

Article 18 (Damages)

1. The Company shall not be responsible for any damages incurred by the user related to the use of services provided free of charge. However, this does not apply in cases of the Company's intention or gross negligence.
2. In case of paid services, if damage is caused to the user due to the Company's intention or negligence, the Company shall compensate for the damage within the scope of the total service usage fees paid by the user in the last 3 months.
3. If the user causes damage to the Company by violating these Terms, the user must compensate the Company for such damage.

Article 19 (Disclaimer)

1. The Company shall not be responsible for damages caused to the user when service provision is impossible in the following cases:
   • When a force majeure state such as natural disasters or similar exists
   • When third parties that entered into service cooperation contracts with the Company for service provision deliberately obstruct the service
   • When obstacles arise in service usage due to causes attributable to the user
   • Other cases without the Company's intention or negligence in addition to numbers 1 through 3
2. The Company shall not be responsible for the loss of expected profits by the user when using the service, nor for damages caused by materials obtained through the service.
3. The Company shall not be responsible for the reliability, accuracy, etc. of the content of information, materials, facts posted by the user in the service.
4. The Company shall not be responsible for cases where users among themselves or between users and third parties conduct transactions, etc. with the service as a medium.

Article 20 (Intellectual Property Rights)

1. Copyrights and other intellectual property rights of works created by the Company belong to the Company.
2. The user shall not, without prior approval from the Company, reproduce, transmit, publish, distribute, broadcast, or otherwise obtain commercial benefits by using or allowing third parties to use information whose intellectual property belongs to the Company obtained through service usage.
3. Copyrights of posts posted by the user within the service belong to the author of such posts.
4. The user permits the Company to use their posts domestically and internationally for the following purposes:
   • To use posts within the service (including sites or media operated by third parties), by modifying them by converting the size of the posts or simplifying them in other ways
   • For the purpose of promoting the Company's services, by allowing media, telecommunications companies, etc. to report or broadcast the content of the user's posts. However, in this case, the Company shall not provide posts or user information to media, telecommunications companies, etc. without the user's individual consent.

Article 21 (Dispute Resolution)

1. The Company establishes and operates a damage compensation processing institution to reflect legitimate opinions or complaints presented by users and compensate their damages.
2. The Company processes matters of complaints and opinions presented by users with priority. However, if rapid processing is difficult, it must immediately notify the user of the reason and processing schedule.
3. In relation to electronic commerce disputes occurring between the Company and the user, if there is a user's damage compensation request, it may follow the adjustment of the dispute adjustment institution delegated by the Fair Trade Commission or provincial/city governor.

Article 22 (Governing Law and Jurisdiction)

1. Lawsuits filed between the Company and the user shall be subject to the laws of the Republic of Korea.
2. Lawsuits related to disputes occurring between the Company and the user shall be filed in the competent court pursuant to the Civil Procedure Act.

Article 23 (Customer Support)

1. For inquiries related to service usage, you can contact us through the following methods:
   • Email: class_customer@enfit.net
   • Website: https://www.deltai.chat/support/chat
   • Phone: 82-2-335-3321
   • Address: 6th Floor, Suseongbangyi Building, Olympic-ro 370, Songpa-gu, Seoul, Republic of Korea
2. Customer support operating hours are from 9:00 AM to 6:00 PM on weekdays, and email inquiries are accepted 24 hours.

Addendum

Article 1 (Effective Date)
These Terms shall take effect on November 1, 2025.

Article 2 (Transitional Measures)
Users who joined before the effective date of these Terms shall be deemed to have agreed to these Terms.

Article 3 (Reference Matters)

• For detailed content of membership prices and benefits, please refer to the official website (https://www.deltai.chat).
• For detailed content of the refund policy, please refer to the separate refund policy document (https://www.deltai.chat/policy/refund).
• For the personal information processing policy, please refer to the separate document (https://www.deltai.chat/policy/privacy).
• Terms of Service: https://www.deltai.chat/policy/service

© 2025 deltai Technologies Inc. All rights reserved.