Terms of Service
Last updated: 2026-08-30
§1 General Provisions and Definitions
By accessing or using the Service, the Customer agrees to be bound by these Terms of Service. A Customer who does not accept these Terms should not use the Service. The service provider is: Michał Rymut WeldStack, ul. Rzeszowska 163B, 39-200 Dębica, Poland, NIP (tax ID): 8722294647, registered in the Polish Central Register of Business Activity (CEIDG), email: [email protected].
For the purposes of these Terms, the following definitions apply: Provider — Michał Rymut WeldStack, identified above; Customer — the entity that has accepted these Terms and for whose benefit the Service is provided; User — a natural person using the Service on behalf of the Customer; Service — the WeldStack platform described in §2; Agreement — the contract for the provision of the Service concluded by acceptance of these Terms; WeldStack — the trade name of the Provider and of the Service.
§2 Description of the Service
As part of the Service, the Provider makes available a cloud-based SaaS platform for comprehensive welding process management. Core features include: welding personnel records and qualification tracking (EN ISO 9606), WPS and WPQR documentation with a built-in WPS Builder and Weld Joint Designer, AI-powered certificate scanning (Google Gemini), welding equipment management, inspection workflows with an Android mobile app, QR-based personnel and equipment identification, a secure Document Vault for file sharing, welding calculators (heat input, preheating, weldability), training plan management, welding supervision records, a full audit trail, and reporting in Excel and PDF formats. The platform is available via web browser and companion Android application. The detailed and current scope of features is described at weldstack.io; the scope of features may change in accordance with §14.
§3 Auxiliary Nature of the Tools
The Service, including the welding calculators, the WPS Builder, the AI-based document analysis features, and the documentation templates, is of a purely auxiliary and instrumental nature. The Provider does not render engineering, advisory, or certification services and does not warrant that documentation or calculation results generated in the Service comply with standards (including EN ISO 9606 and EN ISO 15614) or with the legal requirements applicable to the Customer’s business. The output of artificial intelligence features may contain errors and must be verified in each case. Sole responsibility for verifying, approving, and applying the data, calculations, and documents, as well as for the compliance of welding processes with standards and regulations, rests with the Customer and its qualified personnel (including welding supervision).
§4 Technical Requirements
Use of the Service requires: a device with Internet access, a current version of a web browser with JavaScript and cookies enabled, and an active email address; for the mobile application — a device running a version of Android supported by the Provider. The Provider is not liable for unavailability of the Service resulting from a failure to meet the technical requirements or from causes attributable to the Customer’s own suppliers.
§5 Account Registration
The Customer is obliged to provide true and complete information upon registration. The Customer is responsible for maintaining the confidentiality of the Users’ login credentials and for all activities carried out under its account.
§6 Subscription and Payments
Access to WeldStack is provided through subscription plans. Fees are billed in advance on a monthly or annual basis. Online payments, taxes, and invoices are handled by Paddle as Merchant of Record and authorized reseller of the product. Available payment methods depend on Paddle Checkout and the buyer country. The subscription renews automatically for a subsequent billing period unless it is cancelled no later than before the end of the current period — in the account panel or via Paddle. Cancellation takes effect at the end of the paid-up period; fees for a period already commenced are not subject to pro-rata refund, subject to mandatory provisions of law. Payment refunds are handled by Paddle under the terms of Paddle Checkout (paddle.com/legal/checkout-buyer-terms) and in accordance with mandatory provisions of law.
Fees for a subsequent billing period are charged according to the price list in force on the renewal date of the subscription. If this would mean an increase in the fee compared with the current period, the Provider will inform the Customer of the new fee amount by email at least 30 days before the renewal date. A Customer who does not accept the new fee may cancel the subscription with effect at the end of the current billing period. Failure to cancel before the renewal date constitutes acceptance of the new fee. A fee reduction, or a change that does not increase the Customer’s charges, does not require prior notice. An increase of the fee during a paid-up billing period is excluded.
A downgrade to a lower plan takes effect from the next billing period; if the Customer’s data exceeds the limits of the lower plan, features above the limit may be restricted — the data is not deleted. If the use of the Service exceeds the limits of the selected plan, the Provider will call on the Customer to bring its usage into compliance; if the call remains without effect, the Provider may restrict the features affected by the excess or propose a higher plan.
Paddle is not authorized to amend these Terms or to make statements or promises on behalf of the Provider; in the event of a discrepancy between Paddle’s communications and these Terms, these Terms prevail with regard to the provision of the Service, and the Paddle Checkout terms prevail with regard to payments.
§7 Obligations of the Customer and Users
The Customer agrees to: use the Service only for lawful purposes, maintain accurate welder and certificate data, not share account access with unauthorized users, and comply with all applicable welding industry regulations.
The Customer and its Users are prohibited from supplying content of an unlawful nature. The Customer is liable for the acts and omissions of Users using the Service under its account as for its own. The Customer warrants that it has a legal basis for entering personnel personal data into the Service (including welder data and their certificates). Attempting unauthorized access, testing security measures without the Provider’s consent, reverse engineering, and automated scraping of data from the Service are prohibited.
The Provider does not monitor the content stored by the Customer in the Service and is not liable for it, to the extent provided for in Art. 14 of the Polish Act on the Provision of Services by Electronic Means and Art. 6 of Regulation (EU) 2022/2065 (DSA). Upon receiving an official notice or obtaining credible information about the unlawful nature of content, the Provider may without undue delay disable access to that content, informing the Customer thereof.
If a third party (including a data subject or a holder of intellectual property rights) brings a claim against the Provider arising from: (a) content or data entered into the Service by the Customer or its Users, including the absence of a legal basis for its processing, (b) the Customer’s use of the Service in breach of these Terms or the law, or (c) an instruction to make data publicly available (QR code) issued by the Customer — the Customer shall release the Provider from the obligation to perform towards that party (Art. 392 of the Polish Civil Code) and, if the claim is satisfied or a penalty is imposed on the Provider, shall reimburse the Provider for documented costs, including reasonable costs of legal defence. The Provider shall notify the Customer of the claim without undue delay, enable the Customer to participate in the proceedings, and shall not acknowledge the claim without first informing the Customer. This paragraph does not apply to Customers who are consumers or entrepreneurs with consumer rights, nor to the extent that the claim results from the Provider’s breach of the Agreement. Settlements under Art. 82 GDPR are made in accordance with §9 of the Data Processing Agreement (DPA).
§8 Data Ownership
The Customer retains all rights to the data entered into the Service. The Provider does not claim ownership of the Customer’s welder records, certificates, or documentation.
The Customer grants the Provider a royalty-free, non-exclusive license to use the data and content entered into the Service to the extent necessary to provide it, including in particular: storage, reproduction (including in backups), display to Users, technical processing (including the generation of documents, transcriptions, and thumbnails), and transfer to subcontractors and sub-processors indicated on the sub-processor list — solely for the purpose of providing and securing the Service and performing legal obligations. The license expires upon the deletion of the data in accordance with §13 and the Data Processing Agreement (DPA), except for backups — until their natural rotation.
The Provider may use anonymized and aggregated statistical data on the operation of the Service for the purposes of its development and security; such data does not identify the Customer or any individual.
§9 Service Availability
The Service is provided on an “as available” basis. The Provider does not guarantee uninterrupted or error-free operation of the Service. The Provider may carry out maintenance work resulting in temporary unavailability; it endeavours to give advance notice of planned work of significant scope.
§10 Intellectual Property
WeldStack and its original content, features, and functionality are the property of the Provider and are protected by international copyright, trademark, and other intellectual property laws.
Upon conclusion of the Agreement, the Customer obtains — for the duration of the subscription and subject to timely payment of the fees — a non-exclusive and non-transferable right to use the Service in accordance with these Terms, the documentation, and the limits of the selected plan, solely for the purposes of the Customer’s own business. The Customer is not entitled to: make the Service available to third parties for profit (including resale or rental of access), grant authorizations beyond Users acting on its behalf, or use the Service to create a competing product. All rights not expressly granted remain with the Provider. The right expires upon termination of the Agreement, subject to §13 (data export).
§11 Limitation of Liability
1. The Service is provided “as is” and “as available”. To the fullest extent permitted by law, the Provider’s liability under statutory warranty and under the provisions on the conformity of digital content or digital services with the contract is excluded.
2. The Provider’s liability towards the Customer on any grounds connected with the Agreement, including the Data Processing Agreement (DPA), is limited to actual damage and does not cover lost profits, loss of data recoverable from the Customer’s own backups, loss of reputation, or indirect damages.
3. The Provider’s aggregate liability is limited to the amount of subscription fees paid by the Customer for the 12-month period preceding the event giving rise to the damage (regardless of whether the fees were collected through Paddle). The cap is aggregate for all claims; a multiplicity of claims or events does not increase the cap.
4. The limitations and exclusions set out above do not apply to damage caused by the Provider intentionally, or in other cases where a limitation of liability is impermissible under mandatory provisions of law. In relation to consumers and entrepreneurs with consumer rights, the limitations apply only to the extent permitted by consumer protection law.
§12 Force Majeure
Neither party is liable for non-performance or improper performance of the Agreement caused by force majeure, i.e. an external event that could not have been foreseen or prevented, in particular: natural disaster, war, acts of public authority, epidemic, interruptions in the supply of power or telecommunications services, failure of cloud providers’ infrastructure, and attacks on IT systems (including DDoS). The party invoking force majeure shall notify the other party without undue delay. The obligation to pay fees for the period preceding the force majeure event remains in force.
§13 Suspension and Termination; Data After Termination
1. The Provider may suspend access to the account (in whole or in part) in the event of: (a) a delay in payment, after the fruitless expiry of an additional grace period; (b) use of the Service in a manner that breaches these Terms or the law, or that threatens the security or stability of the Service; (c) a justified request of a competent authority. The suspension is lifted without undue delay once its cause has ceased.
2. The Provider may terminate the Agreement with immediate effect in the event of a gross breach of these Terms and, in other cases of breach, after a fruitless demand to cease the breach within 14 days. The Customer may cancel the subscription at any time with effect at the end of the paid-up billing period; cancellation does not entitle the Customer to a refund of fees for a period already commenced, subject to mandatory provisions of law.
3. For 90 days after termination of the Agreement (a period consistent with §7 of the Data Processing Agreement — DPA), the Customer may request an export of its data; after that period the Provider is entitled to permanently delete the Customer’s data, subject to obligations arising from the law and from the Data Processing Agreement (DPA).
§14 Changes to and Development of the Service
The Provider continuously develops the Service and may change its functionality, including adding, modifying, or withdrawing individual features, and may change technology suppliers — for legitimate reasons such as technical development, security, changes in law, or changes in the licensing terms of third-party suppliers. The Provider will give the Customer advance notice of any change that materially and adversely affects access to the key features of a paid plan, and a Customer who is a consumer or an entrepreneur with consumer rights may in such a case terminate the Agreement in accordance with the provisions on the supply of digital services.
Features marked as “beta”, “test version”, or “early access” are made available for the purpose of their testing and development. The preceding sentence on advance notice of changes does not apply to beta features — the Provider may change, restrict, or withdraw them at any time without notice, to the fullest extent permitted by law, and making them available does not constitute a commitment to include them in the Service; access to beta features expires at the latest when the production version is made available under the terms of the applicable plan. Data processed in beta features remains covered by the Data Processing Agreement (DPA) and the security measures of the Service. The Provider may use feedback and suggestions concerning the Service for its development without remuneration or attribution, on the basis of a non-exclusive, perpetual license granted by the Customer. The free trial period lasts for the time indicated at registration and ends upon its expiry, upon purchase of a subscription, or upon earlier termination by the Provider in the event of a breach of these Terms; the trial period serves to evaluate the Service and is available once per organization. During the trial, separate resource limits apply (number of AI operations and storage space), lower than those of paid plans; they are stated in the pricing page and visible in the account panel. Exhausting them restricts the use of the metered features until a plan is purchased, without any loss of data.
§15 Amendments to the Terms
The Provider may amend these Terms for important reasons, in particular: changes in the law, changes in the scope or manner of providing the Service, security considerations, changes on the part of suppliers (including Paddle), or the need to remove ambiguities. The Provider notifies the Customer of an amendment at least 15 days before it enters into force, by email or by a notice within the Service, indicating the effective date. A Customer who does not accept the amendments may terminate the Agreement with effect on the day preceding their entry into force. Continued use of the Service after that date constitutes acceptance of the amended Terms. Amendments do not affect rights acquired for a paid-up billing period.
§16 Governing Law and Disputes
These Terms are governed by Polish law. Disputes with Customers who are neither consumers nor entrepreneurs with consumer rights shall be resolved by the court having territorial jurisdiction over the Provider’s principal place of business (Dębica, Poland). The choice of law and forum does not deprive consumers or entrepreneurs with consumer rights of the protection afforded to them by mandatory provisions of law.
§17 Complaints Procedure
In the event of objections concerning the Service, the Customer may file a complaint by email at [email protected] or by mail to: Michał Rymut WeldStack, ul. Rzeszowska 163B, 39-200 Dębica, Poland. A complaint should identify the Customer and describe the problem. The Provider handles complaints within 14 days of receipt, notifying the Customer of the outcome at the email address from which the complaint was sent. If the resolution of the complaint is not satisfactory, the Customer may refer the matter to the competent court. A Customer who is a consumer may additionally use out-of-court means of handling complaints and pursuing claims, including the assistance of a district (municipal) consumer ombudsman or a provincial inspector of the Trade Inspection; the Provider does not undertake to participate in out-of-court consumer dispute resolution proceedings unless such an obligation arises from mandatory provisions of law.
§18 Right of Withdrawal
A Customer who is a consumer or an entrepreneur with consumer rights has the right to withdraw from the Agreement within 14 days of its conclusion without giving any reason. To exercise this right, it is sufficient to send a statement to [email protected] or to the Provider’s postal address. The statement may be made using the model form set out in Annex 2 to the Polish Consumer Rights Act, but this is not obligatory. Subscription sale contracts are concluded with Paddle as Merchant of Record — the withdrawal statement may also be submitted directly to Paddle; a statement received by the Provider will be forwarded to Paddle without undue delay. If, at the Customer’s express request, the provision of the service began before the expiry of the withdrawal period, in the event of withdrawal the Customer shall pay an amount proportionate to the scope of the services performed up to the moment of withdrawal. The right of withdrawal expires once the service has been fully performed, if performance began with the express consent of a Customer who was informed of the loss of the right of withdrawal.
§19 Digital Service Delivery
WeldStack is a digital service (SaaS). Access to the platform is granted immediately upon successful payment processing and account activation. The service is delivered electronically via a web browser — no physical delivery is involved. Upon subscription activation, the Customer receives full access to all features included in the selected plan.
§20 Annex — Data Processing Agreement (DPA)
The Data Processing Agreement (DPA) is an integral part of these Terms and governs how the Provider processes personal data entered into the Service by the Customer (Art. 28 GDPR). By accepting these Terms, the Customer also accepts the DPA. Full text: weldstack.io/dpa. Current sub-processor list: weldstack.io/subprocessors.
With regard to the processing of personal data, the Data Processing Agreement (DPA) prevails; in all other respects these Terms prevail. The limitations of liability provided for in §11 of these Terms also apply to liability arising from the Data Processing Agreement, to the fullest extent permitted by law. Changes to the sub-processor list are made in the manner set out in §5 of the Data Processing Agreement (notification and right to object).
§21 Final Provisions
If any provision of these Terms proves to be invalid or ineffective, the remaining provisions remain in force, and the invalid provision is replaced by the provision of law closest to its purpose (severability). In relation to consumers and entrepreneurs with consumer rights, a provision found to be unfair is not binding on them, and the Agreement remains in force in all other respects without replacement of that provision. The Provider may transfer the rights and obligations under the Agreement to an entity taking over the operation of the Service, in particular in connection with a change of the legal form of the business; the Customer will be informed thereof.
The Customer may not, without the Provider’s prior consent (at least in documentary form), transfer its rights or obligations under the Agreement to a third party; this does not apply to the transfer of the Agreement to the Customer’s legal successor as a result of a transformation, merger, or sale of the business, of which the Customer shall inform the Provider.
These Terms, together with their annexes (the Data Processing Agreement — DPA and the sub-processor list) and the description of the selected plan, constitute the entire agreement of the parties concerning the provision of the Service. The Customer’s standard contractual terms — including general purchasing terms and terms included in purchase orders — do not bind the Provider, even if the Provider does not object to them, unless the Provider has expressly accepted them in documentary form. This does not limit consumers’ rights arising from pre-contractual information.
The Provider may use subcontractors, for whose actions it is liable as for its own. After the expiry of the Agreement, the provisions which by their nature are intended to continue to apply remain in force, in particular §3, §8, §10, §11, §16, §17, and §21, as well as §7 of the Data Processing Agreement (data deletion).
These Terms have been drawn up in Polish and made available in English, German, Spanish, French, and Italian translations. In the event of any discrepancy, the Polish version prevails, unless mandatory provisions of law provide otherwise.