End Customer Terms
Last updated: March 30, 2026
Previous Versions
Effective 30 March 2026
These End Customer Terms (“Terms”) are published by StackOne Technologies Limited, a company incorporated in England and Wales (company number 14684360), with registered offices at 2 Communications Road, Newbury, Berkshire, England, RG19 6AB (“StackOne”, “we”, “us”, “our”).
These Terms govern your use of StackOne’s interfaces through which you interact directly with StackOne’s platform, including the authentication interface and file selection interface (the “StackOne Interface”), through which you connect your account with, or interact with content from, a third-party application via a StackOne customer’s platform (“Customer Application”). By using the StackOne Interface, you agree to be bound by these Terms. If you do not agree, do not use the StackOne Interface.
These Terms apply solely to your direct interaction with the StackOne Interface. Your broader relationship with the operator of the Customer Application you are connecting to is governed by that operator’s own terms and privacy policy, which are separate from these Terms.
1. Who We Are and What We Do
1.1 StackOne provides integration infrastructure that enables businesses (“Customers”) to connect their applications to third-party systems. As part of this, StackOne operates the StackOne Interface, which facilitates the connection of your account to a Customer Application and, where applicable, the browsing and retrieval of documents from connected storage platforms.
1.2 StackOne acts as a sub-processor of your data in this context, processing it on the instructions of the Customer whose application you are connecting to. StackOne does not control the purpose or scope of the broader data relationship between you and that Customer.
1.3 The Customer whose application you are connecting to is responsible for directing you to the StackOne Interface and for ensuring these Terms are made available to you prior to your use of the StackOne Interface.
2. Acceptance
2.1 By using the StackOne Interface, you confirm that you have read and agree to these Terms. Acceptance is by use — no signature or active click-through is required.
2.2 If you are using the StackOne Interface on behalf of an organisation, you represent and warrant that you have authority to bind that organisation to these Terms.
2.3 StackOne reserves the right to update these Terms from time to time. The current version will always be available at stackone.com/terms/end-customer-terms. Your continued use of the StackOne Interface after any update constitutes acceptance of the revised Terms.
3. Data Processing
3.1 When you use the StackOne Interface, StackOne processes data strictly necessary for the relevant interaction. This may include:
(a) identity and credential data necessary to authenticate your account with a relevant third-party system;
(b) connection metadata including account identifiers, timestamps, and connection status;
(c) where you use a file selection interface, document metadata and, where you select a file for retrieval, document content solely for the purpose of returning the selected file to the Customer Application; and
(d) such other data as is strictly necessary to facilitate the specific StackOne Interface interaction you are engaged in.
3.2 StackOne does not retain document content beyond the time strictly necessary to return it to the Customer Application. For native third-party picker integrations (including SharePoint, OneDrive, and Google Drive), the relevant third-party provider’s terms and privacy policy also apply to that browsing interaction.
3.3 StackOne processes this data as sub-processor on behalf of the Customer whose application you are connecting to, acting on that Customer’s instructions. You should refer to that Customer’s privacy notice for information about how your data is used in the broader context of their service.
3.4 Where the StackOne Interface is accessed by End Customers established in the European Economic Area or United Kingdom, StackOne processes personal data in accordance with Applicable Data Protection Laws. StackOne’s privacy policy is available at stackone.com/terms/privacy-policy.
3.5 StackOne may process technical and operational metadata derived from your use of the StackOne Interface in anonymised and aggregated form to improve the reliability and performance of the StackOne Interface. Such anonymised data cannot identify you or the Customer Application you are connecting to.
3.6 StackOne will not use data processed through the StackOne Interface to train any artificial intelligence or machine learning model.
4. Your Obligations
4.1 By using the StackOne Interface, you represent and warrant that:
(a) you are authorised to connect the account you are authenticating and have all necessary rights and permissions to do so;
(b) where you use a file selection interface, you are authorised to access and retrieve the documents you select;
(c) your use of the StackOne Interface complies with all applicable laws and regulations; and
(d) you will not attempt to circumvent, reverse engineer, or interfere with the StackOne Interface or any security controls associated with it.
4.2 You shall not use the StackOne Interface to connect accounts or access documents you are not authorised to access, or for any purpose other than interacting with a Customer Application as intended.
5. Intellectual Property
5.1 StackOne retains all right, title, and interest in and to the StackOne Interface and all associated technology and intellectual property. These Terms do not transfer any ownership or licence rights to you beyond the limited right to use the StackOne Interface for the purpose of interacting with a Customer Application.
5.2 As between you and StackOne, you retain all right, title, and interest in and to your account data and any documents you select via the StackOne Interface. StackOne’s right to process your data is limited to the purposes set out in Section 3.
6. No Warranty
6.1 THE STACKONE INTERFACE IS PROVIDED “AS IS” AND “AS AVAILABLE” WITHOUT ANY WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY. STACKONE DOES NOT WARRANT THAT THE STACKONE INTERFACE WILL BE UNINTERRUPTED, ERROR-FREE, OR SECURE.
6.2 STACKONE MAKES NO WARRANTY AS TO THE SUITABILITY OF THE STACKONE INTERFACE FOR ANY PARTICULAR PURPOSE. YOUR USE OF THE STACKONE INTERFACE IS AT YOUR OWN RISK.
7. Limitation of Liability
7.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, STACKONE’S AGGREGATE LIABILITY TO YOU IN CONNECTION WITH THESE TERMS AND YOUR USE OF THE STACKONE INTERFACE SHALL BE LIMITED TO ONE HUNDRED POUNDS (£100).
7.2 IN NO EVENT SHALL STACKONE BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES ARISING OUT OF OR IN CONNECTION WITH YOUR USE OF THE STACKONE INTERFACE, INCLUDING LOSS OF DATA, LOSS OF PROFITS, OR LOSS OF BUSINESS OPPORTUNITY, EVEN IF STACKONE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
7.3 Nothing in these Terms limits StackOne’s liability for: (a) death or personal injury caused by negligence; (b) fraud or fraudulent misrepresentation; or (c) any other liability that cannot be excluded or limited by applicable law.
7.4 Your primary relationship and recourse in connection with the Customer Application and the services provided to you is with the operator of that application, not StackOne.
8. Suspension and Termination
8.1 StackOne may suspend or terminate your access to the StackOne Interface without liability if:
(a) you breach these Terms or use the StackOne Interface in a manner that is unauthorised, abusive, or harmful to StackOne or others;
(b) the Customer whose application you are connecting to terminates or suspends their agreement with StackOne;
(c) StackOne is required to do so by applicable law or a governmental authority; or
(d) StackOne discontinues the relevant StackOne Interface or any part of it.
8.2 Upon termination, your right to use the StackOne Interface will immediately cease and StackOne will handle your data in accordance with Section 3 and applicable data protection law.
9. General
9.1 Governing Law. These Terms and any disputes arising out of or in connection with them shall be governed by the laws of England and Wales. The parties submit to the exclusive jurisdiction of the courts of England and Wales.
9.2 Third Party Rights. A person who is not a party to these Terms has no rights under the Contracts (Rights of Third Parties) Act 1999 to enforce any term of these Terms.
9.3 Severability. If any provision of these Terms is held invalid or unenforceable, the remaining provisions will continue in full force and effect.
9.4 Entire Agreement. These Terms constitute the entire agreement between you and StackOne in respect of your use of the StackOne Interface and supersede any prior representations or agreements on this subject. They do not affect the terms of any separate agreement between you and the operator of the Customer Application.
9.5 No Waiver. Failure by StackOne to enforce any provision of these Terms shall not constitute a waiver of StackOne’s right to enforce that provision in the future.
10. Contact
If you have questions about these Terms or how StackOne processes your data, please contact us at privacy@stackone.com.
If you have questions about the Customer Application you are connecting to, please contact the operator of that application directly.
11. Definitions
In these Terms, the following definitions apply:
“Applicable Data Protection Laws” means all applicable laws relating to data protection, privacy, and the processing of personal data, including the UK GDPR and the Data Protection Act 2018.
“Customer” means the business or entity that has contracted with StackOne to use StackOne’s integration platform and whose Customer Application you are connecting your account to or interacting with via the StackOne Interface.
“Customer Application” means the application operated by a Customer to which you are connecting your account or accessing content via the StackOne Interface.
“End Customer” or “you” means the individual or entity using the StackOne Interface to connect their account to, or interact with content from, a Customer Application.
“StackOne”, “we”, “us”, “our” means StackOne Technologies Limited.
“StackOne Interface” means any interface operated by StackOne through which an End Customer interacts directly with StackOne’s platform, including without limitation: (a) the authentication interface through which End Customers connect their accounts to a Customer Application; and (b) the file selection interface through which End Customers browse and select documents from connected storage platforms. StackOne may introduce additional interfaces from time to time, all of which will be governed by these Terms.