1. Definitions

For the purposes of these Terms of Use, the following terms shall have the meanings set forth below:

"Platform" or "Service" — the cloud software Construction Hub, accessible at constructionhub.bg, including all features, API interfaces and mobile applications.
"Provider" — the legal entity providing the Platform, identified in Section 22 of these terms.
"Customer" or "Subscriber" — the legal entity (company, sole proprietor or other organization) that has registered a company account and entered into a subscription agreement.
"User" — a natural person who accesses the Platform through an account created by or for the Customer.
"Account Administrator" — a User with full rights to manage the company account, including adding/removing users and managing the subscription.
"Customer Data" — all data, documents, files and information uploaded, created or processed by the Customer and its Users on the Platform.
"Subscription Plan" — the service package selected by the Customer with defined limits for number of users, projects, storage and features.
"Construction Documents" — contracts, acceptance acts, quantity surveys, offers, invoices, proforma invoices, payment certificates and other documents related to construction projects.
"AI Features" — functionalities using artificial intelligence for processing, parsing, analysis or generation of data and content.
"Third-Party Services" — software, platforms and services of third parties integrated with or used by the Platform (including but not limited to payment processors, AI providers, hosting services).

2. Acceptance of Terms

By registering an account, checking the "I accept the Terms of Use" checkbox, or by continued use of the Platform, you confirm that:

You have read, understood and accept these Terms of Use in their entirety.
You are at least 18 years of age and have full legal capacity.
If acting on behalf of a legal entity — you have the necessary authority to bind that entity to these terms.
This agreement is a B2B (business-to-business) agreement. The Platform is intended for professional use by merchants and legal entities. Consumer protection laws do not apply.
You accept that these Terms of Use, together with the Privacy Policy, Cookie Policy and the selected Subscription Plan terms, constitute the entire agreement between the parties.

3. Service Description

Construction Hub is a cloud-based platform (SaaS) for construction project management, providing the following modules and features:

Accounting — invoices, expenses, proforma invoices, transactions, advances, bank accounts, revenues, financing.
Projects — contracts, acceptance acts, payment certificates, offers, tenders, quantity surveys, objects, price lists.
Partners — clients, suppliers, subcontractors, users, departments.
Inventory — stock items, movements, warehouses, reservations.
Analytics and reports — financial analysis, reports, data export.
AI Features — automatic document parsing, data extraction, intelligent search and nomenclature matching.

The Platform is a management and organizational tool. It does NOT replace professional accounting, legal, engineering or tax advice. The Customer is obligated to ensure professional oversight of all data and documents processed through the Platform. Feature availability depends on the selected Subscription Plan. The Provider reserves the right to add, modify or remove features with reasonable notice.

4. Registration and Accounts

When registering a company account, the Customer and its Users agree to:

Provide accurate and complete data about the legal entity, including company name, tax ID, VAT number (if applicable), registered address and contact details.
Keep registration data up to date and update it promptly upon any change.
Keep passwords and login credentials confidential and not share them with unauthorized persons.
Notify the Provider immediately upon suspicion of unauthorized access to the account.

The Account Administrator is responsible for managing users, their roles and permissions within the company account. The Customer bears full responsibility for all actions performed by its authorized Users on the Platform.

The Provider reserves the right to verify the information provided and to suspend accounts upon discovery of inaccuracies, fraudulent data or suspicion of unauthorized access.

5. Subscriptions, Fees and Payments

5.1. Trial Period

The Provider may offer a free trial period with limited functionality. After expiration, access to paid features will be discontinued unless the Customer selects a paid Subscription Plan. Data entered during the trial period will be retained.

5.2. Subscription Plans and Limits

Each Subscription Plan defines specific limits for: maximum number of users, maximum number of projects, file storage volume, access to AI features and advanced analytics. Upon reaching a limit, the Platform may restrict the creation of new records without deleting existing data.

5.3. Billing and Payment

Payments are processed through a certified payment processor (Stripe). The subscription renews automatically at the beginning of each new period (monthly or annual), unless the Customer cancels before the end of the current period. Listed prices do not include VAT and applicable taxes, which are the responsibility of the Customer.

5.4. Failed Payments

In case of a failed payment, the Provider will make retry attempts during a grace period. If payment is not received after the grace period expires, access to the Platform may be restricted or suspended. Customer data will be retained for a period of 90 days after suspension.

5.5. Price and Plan Changes

The Provider reserves the right to change subscription plan pricing with a minimum of 30 days' notice by email. New prices take effect from the next renewal period. Upgrades take effect immediately with prorated billing. Downgrades take effect from the beginning of the next period.

5.6. Refunds

Prepaid subscription fees are non-refundable for partial periods, except in cases where the Provider terminates the service without cause before the end of the paid period.

6. Acceptable Use Policy

The Customer and its Users agree NOT to perform the following actions:

Upload, create or process fraudulent, forged or misleading financial documents (invoices, contracts, acts, etc.).
Use the Platform for money laundering, tax fraud or other illegal financial operations.
Attempt to access data belonging to other Customers (violation of data isolation).
Share login credentials (username and password) with unauthorized persons.
Circumvent Subscription Plan limits through technical means.
Reverse engineer, decompile, disassemble or attempt to extract the source code of the Platform.
Automated access (scraping, bots, crawlers) without explicit written permission.
Upload malicious software, viruses, trojans or other harmful code.
Perform actions that excessively burden the infrastructure or disrupt normal Platform operations.
Resell, sublicense or transfer access to the Platform to third parties without the Provider's written consent.
Use AI features to generate misleading or fraudulent content.
Violate applicable laws and regulations, including construction, tax and accounting regulations.

The Provider reserves the right to take the following measures in case of violations: warning, temporary suspension of access, or immediate account termination for severe or repeated violations. The Provider may use automated monitoring systems to verify compliance with these rules without accessing the content of Customer Data.

7. Customer Data and Content

7.1. Data Ownership

The Customer retains full ownership of all Customer Data uploaded, created or processed on the Platform. The Provider does not acquire ownership rights over Customer Data.

7.2. Processing License

The Customer grants the Provider a limited, non-exclusive license to store, process, display and transmit Customer Data solely for the purposes of providing the Service. This license includes the right to create derivative data (such as vector embeddings for search) for Platform functionality.

7.3. AI Processing

By using AI features, the Customer agrees that the content of uploaded documents may be sent to third-party AI service providers for processing, parsing and analysis. Customer Data is NOT used for training AI models. AI processing is performed solely for delivering functionality to the specific Customer.

7.4. Data Accuracy

The Customer bears full and sole responsibility for the accuracy, legality and completeness of all Customer Data, including but not limited to: financial data, amounts, quantities, tax information, counterparty data and content of Construction Documents. The Provider does not verify the content or validity of uploaded data and documents.

7.5. Data Export

The Customer has the right to export their Customer Data at any time through the Platform's built-in export features.

8. Intellectual Property

All intellectual property rights in the Platform — including but not limited to software code, algorithms, AI models, user interface, design, logos, trademarks and documentation — belong exclusively to the Provider and/or its licensors.

The Customer receives a limited, non-exclusive, non-transferable, revocable license to use the Platform in accordance with these terms and the selected Subscription Plan.
Templates and formats of generated documents (PDF, Excel) are the intellectual property of the Provider. The content of those documents belongs to the Customer.
Any suggestions, improvement ideas or feedback provided by the Customer or its Users become the property of the Provider without obligation for compensation.
Copying, modifying, creating derivative works, reverse engineering or decompiling any part of the Platform is prohibited.

9. Confidentiality

The parties undertake to maintain the confidentiality of any information received from the other party in connection with this agreement that is not publicly available.

The Provider shall not access Customer Data except when necessary for: providing and maintaining the Service, responding to technical support requests from the Customer, fulfilling legal obligations, or with the Customer's explicit consent.
Employees and subcontractors of the Provider who have access to Customer Data are bound by contractual confidentiality obligations.
Confidentiality obligations survive the termination of this agreement for a period of 3 (three) years.
Exception: information that a party is obligated to disclose by law, court order or act of a competent authority, provided that (to the extent permitted) it notifies the other party in advance.

10. Data Protection

Personal data processing is carried out in accordance with the General Data Protection Regulation (GDPR) and applicable data protection laws. Detailed information is available in our Privacy Policy.

With regard to personal data uploaded by the Customer to the Platform, the Customer acts as Data Controller and the Provider acts as Data Processor within the meaning of Art. 28 of the GDPR.
The Provider uses sub-processors to deliver the Service, including: payment processors, AI service providers, hosting providers and email services. An up-to-date list of sub-processors is available upon request.
A Data Processing Agreement (DPA) is available upon request from the Customer.
In the event of a data security breach, the Provider will notify the Customer without undue delay and within 72 hours in accordance with Art. 33 of the GDPR.
The Customer is responsible for ensuring a legal basis for the processing of personal data they upload to the Platform.

11. Service Availability

The Provider uses commercially reasonable efforts to ensure continuous availability of the Platform but does NOT guarantee a specific level of availability (SLA).

Scheduled maintenance is performed with advance notice where possible, preferably outside peak hours.
The Platform depends on third-party services (hosting, payment processors, AI providers). Unavailability of these services may affect Platform functionality and does not constitute a breach of these terms.
The Provider is not liable for interruptions caused by factors beyond its reasonable control, including: Customer's internet connectivity, Customer's hardware issues, actions of third parties.
Temporary performance degradation or partial unavailability of individual features does not constitute a breach of contract.

12. Disclaimer of Warranties

THE PLATFORM IS PROVIDED "AS IS" AND "AS AVAILABLE". THE PROVIDER EXPRESSLY DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

The Provider does NOT warrant that the Service will be uninterrupted, error-free, completely secure or will meet the Customer's specific requirements.
The Platform is NOT a certified accounting system under applicable accounting laws and regulations. The Customer is responsible for ensuring compliance with applicable accounting and tax requirements.
The Platform does NOT guarantee the legal validity or enforceability of generated or processed Construction Documents. All documents must be reviewed by qualified professionals before use for legal, tax or regulatory purposes.
AI features (automatic parsing, data extraction, nomenclature matching) are assistive tools that MAY contain errors, omissions or inaccuracies. The Customer is REQUIRED to verify all data obtained through AI processing.
Financial calculations (amounts, VAT, aggregates, currency conversions) are assistive and must be verified by qualified accounting personnel.
Quantity surveys and calculations represent estimates for management purposes and are NOT certified engineering measurements.
Automatic document numbering is for internal organizational purposes and does NOT guarantee compliance with tax authority or accounting law requirements.
The Provider provides NO warranties regarding the availability, accuracy or reliability of integrated third-party services.

13. Limitation of Liability

13.1. Maximum Liability

THE PROVIDER'S TOTAL AGGREGATE LIABILITY UNDER THIS AGREEMENT, REGARDLESS OF THE LEGAL BASIS (CONTRACT, TORT OR OTHERWISE), SHALL NOT EXCEED THE AMOUNT OF SUBSCRIPTION FEES ACTUALLY PAID BY THE CUSTOMER DURING THE 12 MONTHS PRECEDING THE EVENT GIVING RISE TO THE CLAIM.

13.2. Excluded Damages

The Provider shall NOT be liable for:

Indirect, incidental, consequential, special or punitive damages.
Lost profits, lost revenue or anticipated savings.
Loss or corruption of data through no fault of the Provider.
Interruption of the Customer's business operations.
Costs of procuring substitute services.
Losses arising from reliance on data generated or processed by AI features without proper verification.
Losses arising from the use of Construction Documents generated through the Platform in legal, tax or regulatory proceedings.
Penalties, fines or sanctions from tax authorities, labor inspectorates or other regulatory bodies.
Losses caused by data entry errors by Users.
Losses caused by unauthorized access due to the Customer's failure to maintain security measures.

13.3. Non-Excludable Cases

The limitations in this section do not apply to damages caused by the Provider's intentional misconduct or gross negligence, in accordance with applicable law. The Customer acknowledges that the subscription fees reflect the risk allocation set forth in this section.

14. Indemnification

The Customer agrees to indemnify, defend and hold harmless the Provider, its employees, directors, agents and subcontractors from and against any and all claims, actions, losses, costs (including reasonable attorney fees) arising from or related to:

The Customer's or its Users' use of the Platform.
The content, accuracy or legality of Customer Data.
Breach of these Terms of Use by the Customer or its Users.
Violation of applicable legislation (tax, accounting, construction, labor law) by the Customer.
Claims by third parties related to documents generated, processed or stored through the Platform.
Infringement of third-party intellectual property rights through content uploaded by the Customer.

Upon receipt of a claim, the Provider will notify the Customer within a reasonable time. The Customer shall assume control of the defense with counsel approved by the Provider. The Customer may not enter into any settlement that imposes obligations on the Provider without the Provider's prior written consent.

15. Term and Termination

15.1. Term

This agreement takes effect from the date of registration and continues until terminated as described below.

15.2. Termination by Customer

The Customer may cancel their subscription at any time. Access to paid features continues until the end of the current paid period. No refund is due for the unused portion of the period.

15.3. Termination by Provider for Cause

The Provider may terminate the agreement for: material breach of the terms that is not remedied within 15 days of written notice; immediately — for fraud, illegal activity, threat to system security or other Customers; non-payment after expiration of the grace period.

15.4. Termination by Provider without Cause

The Provider may terminate the agreement with 90 days' written notice. In this case, prepaid and unused subscription fees will be refunded on a prorated basis.

15.5. Effects of Termination

Upon termination:

Access to the Platform is discontinued at the end of the paid period or immediately (for termination for cause).
The Customer has 30 (thirty) calendar days to export their Customer Data through the Platform's built-in export features.
After the 30-day period expires, the Provider may permanently delete all Customer Data.
Outstanding payment obligations remain due and payable.
The following sections survive termination: Definitions, Intellectual Property, Confidentiality, Limitation of Liability, Indemnification, Dispute Resolution, Governing Law, General Provisions.

15.6. Suspension

The Provider may temporarily suspend (without terminating) access to the Platform upon suspicion of violations, pending investigation. During suspension, Customer Data is preserved.

16. Force Majeure

Neither party shall be liable for failure to perform its obligations under this agreement when such failure is caused by circumstances beyond its reasonable control (force majeure), including but not limited to:

Natural disasters, earthquakes, floods, fires.
War, terrorism, civil unrest, embargo.
Government acts, laws or regulations restricting operations.
Pandemics, epidemics and related restrictive measures.
Power supply or telecommunications infrastructure interruptions.
Cyberattacks, DDoS attacks or other malicious actions by third parties.
Interruption of services by key providers (hosting, payment processors, AI providers).

The affected party must notify the other party immediately and take reasonable measures to mitigate the consequences. If force majeure continues for more than 90 (ninety) days, either party may terminate the agreement by written notice. The Customer's payment obligations are NOT released by the force majeure clause, except for periods during which the Service was completely unavailable.

17. Third-Party Services

The Platform integrates and uses third-party services to deliver its functionality. By using the Platform, the Customer acknowledges the following:

Payment operations are processed by a certified payment processor (Stripe). The Customer may be bound by additional terms of the payment processor.
AI features use AI service providers (including OpenAI) for document processing. Data is transmitted over encrypted channels and processed in accordance with the respective provider's terms.
The Platform may integrate banking services for automatic transaction import. The Provider is not responsible for the accuracy of data received from banking institutions.
The Provider is not responsible for the availability, accuracy, security or performance of third-party services.
The Provider reserves the right to change third-party service providers with notice to the Customer, provided the change does not materially degrade the quality of the Service.

18. AI and Automated Processing

Construction Hub uses artificial intelligence technologies to provide certain functionalities. By using these features, the Customer acknowledges and agrees to the following:

AI features (including OCR parsing, automatic data extraction, intelligent nomenclature matching and content generation) are ASSISTIVE TOOLS and do not replace professional judgment.
Results from AI processing MAY contain errors, omissions, inaccuracies or incorrect interpretations. The Customer is REQUIRED to verify all AI-generated or AI-processed data before using it for business, financial, legal or regulatory purposes.
Documents (invoices, contracts, offers, etc.) may be sent to AI service providers for processing. This processing is performed over encrypted channels in compliance with applicable data protection rules.
The Provider may update AI models and algorithms, which may change the quality or characteristics of the results.
The Provider is NOT liable for any decisions, actions or inactions by the Customer or its Users based on data obtained through AI processing.
Customer Data processed by AI systems is NOT used for training artificial intelligence models.

19. Dispute Resolution

Any disputes arising from or in connection with these Terms of Use shall be resolved in the following order:

Step 1: Good Faith Negotiation. The parties agree to attempt voluntary resolution of the dispute through direct negotiations within 30 (thirty) days of written notice of the dispute.
Step 2: Mediation. If negotiations do not yield results, the parties may refer the dispute to mediation in accordance with applicable mediation laws, before a registered mediator.
Step 3: Court Proceedings. If the dispute is not resolved through negotiation or mediation, it shall be referred to the competent court at the Provider's registered seat.
Exception: Either party may seek interim or urgent relief from a competent court without being required to go through Steps 1 and 2.
Each party bears its own costs for dispute resolution, unless the court orders otherwise.

20. Changes to Terms

The Provider reserves the right to amend these Terms of Use under the following conditions:

Material changes (changes to pricing, limitation of liability, data processing or core features) take effect 30 (thirty) days after notification by email and through in-Platform notice.
Non-material changes (wording corrections, clarifications, contact information updates) take effect from the date of publication.
Continued use of the Platform after changes take effect is deemed acceptance of the new terms.
If the Customer disagrees with a material change, they may terminate the agreement within 30 days of notification, without penalties or additional obligations.
An archive of previous versions of the Terms of Use is available upon request.

21. General Provisions

Severability. If any provision of these terms is found invalid or unenforceable by a competent court, the remaining provisions shall remain in full force and effect.
Entire Agreement. These Terms of Use, together with the Privacy Policy, Cookie Policy and Subscription Plan terms, constitute the entire agreement between the parties and supersede all prior oral or written agreements.
Waiver. Failure to exercise or delay in exercising any right under these terms does not constitute a waiver of that right. A single exercise of a right does not preclude its future exercise.
Assignment. The Customer may not assign their rights or obligations under these terms without the Provider's prior written consent. The Provider may freely assign its rights and obligations, including in connection with a merger, acquisition or sale of assets.
Notices. All notices shall be sent by email: to the Customer — at the registered email address; to the Provider — at info@constructionhub.bg. A notice is deemed received at the time of sending to the registered email address.
Independent Parties. Nothing in these terms creates a partnership, joint venture, employment relationship or agency between the parties.
Language. In case of discrepancy between the Bulgarian and any other language version of these terms, the Bulgarian text shall prevail.

22. Governing Law and Contact Information

These Terms of Use shall be governed by and construed in accordance with the substantive laws of the Republic of Bulgaria, with due regard to applicable European Union regulations (including the GDPR and the Digital Services Act).

Contact information:

Provider: Construction Hub
Legal inquiries: info@constructionhub.bg
Support: support@constructionhub.bg
Data Protection Officer (DPO): info@constructionhub.bg