Privacy Policy

Last Updated: June 1, 2026

1. Introduction

eStack, Inc. (“Company”, “we”, “us”, or “our”) is committed to protecting your privacy. This Privacy Policy explains how we collect, use, maintain, protect, and disclose information when you use our website (www.estack.com) and our software-as-a-service platform (collectively, the “Services”).

This policy applies to all users of the Services regardless of location. Where applicable, additional jurisdiction-specific rights are described in Section 12.

2. Information We Collect

Account and Billing Information

When you create an account or subscribe, we collect your name, email address, company name, billing address, and payment information. Payment details are processed by our payment processor and are not stored on our servers.

Transaction and Usage Data

We collect records of your subscription, purchases, feature usage, log data (IP address, browser type, device type, operating system, pages visited, timestamps), and crash reports.

Customer Data

You may upload or input data into the Services including product catalogs, order information, inventory data, and supplier details (“Customer Data”). You own your Customer Data. We process it only to provide the Services.

Communications

If you contact us by email, phone, or contact form, we retain those communications and their contents.

Cookies and Tracking Technologies

We use cookies and similar technologies as described in Section 9 of this policy.

3. How We Use Information

We use the information we collect to:

• Provide, maintain, and improve the Services;
• Process transactions and manage your subscription;
• Communicate with you about your account, updates, and support;
• Send product updates and marketing communications (you may opt out at any time);
• Detect and prevent fraud, abuse, and unauthorized access;
• Comply with legal obligations;
• Enforce our Terms of Service and Software License Agreement.

Our legal basis for processing (under GDPR/UK GDPR) is: performance of a contract (account and subscription management), legitimate interests (security, fraud prevention, service improvement), legal obligation (tax and regulatory compliance), and consent (marketing communications and non-essential cookies).

4. Children’s Privacy

The Services are intended for business users and are not directed at children under 13. We do not knowingly collect personal information from children under 13. If we learn that we have done so, we will delete it promptly.

5. Disclosure of Information

We may share your information with:

• Service providers — hosting, payment processing, email delivery, analytics, and customer support tools that process data on our behalf under data processing agreements;
• Third-party platform integrations — Amazon, Walmart, Shopify, eBay, and shipping carriers, to the extent required to fulfill the Services you have configured;
• Legal and regulatory authorities — when required by law, court order, or to protect our legal rights;
• Business transfers — in connection with a merger, acquisition, or sale of assets, with notice to you.

We do not sell your personal information to third parties.

6. International Data Transfers

We are headquartered in the United States. If you access the Services from the EU, UK, or Switzerland, your personal data will be transferred to and processed in the United States, which may have different data protection laws than your country.

For transfers from the EU and UK, we rely on Standard Contractual Clauses (SCCs) approved by the European Commission and UK ICO respectively. For transfers from Switzerland, we comply with the requirements of the revFADP. You may request a copy of our transfer safeguards by contacting support@estack.com.

7. Data Security

We use commercially reasonable administrative, technical, and physical safeguards to protect your personal information against unauthorized access, alteration, disclosure, or destruction. However, no method of transmission over the internet is 100% secure. You are responsible for maintaining the confidentiality of your account credentials.

8. Data Retention

We retain personal information for as long as necessary to provide the Services, comply with legal obligations, resolve disputes, and enforce agreements. When you close your account, your Customer Data is available for export for 30 days and then permanently deleted. Billing and transaction records may be retained for up to 7 years for tax and legal compliance purposes.

9. Cookies and Tracking

We use the following categories of cookies:

• Essential cookies — strictly necessary for the website and Services to function (session management, security). These cannot be disabled.
• Analytics cookies — help us understand how visitors interact with our website (e.g., page views, traffic sources). Enabled only with your consent.
• Preference cookies — remember your settings such as language and currency selection. Enabled only with your consent.

You can manage your cookie preferences using the banner displayed on your first visit to our website, or by adjusting your browser settings. Note that disabling non-essential cookies may affect some functionality.

10. Your Choices

You may at any time:

• Update or correct your account information in your account settings;
• Opt out of marketing emails by clicking “unsubscribe” in any email we send;
• Request a copy of your personal data by contacting us;
• Request deletion of your personal data, subject to legal retention obligations;
• Withdraw consent for non-essential cookies via the cookie banner.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will post updates on this page with a new “Last Updated” date. For material changes, we will notify you by email or in-app notification at least 14 days before the change takes effect.

12. Jurisdiction-Specific Rights

13. Contact Information

eStack, Inc.
2120 1st Avenue N, Unit B-6
Seattle, WA 98109 — United States

Email: support@estack.com
Phone: +1 (206) 890-0196