How eStack Processes Your Data

Last Updated: August 12, 2026

This page describes what personal data eStack, Inc. (“eStack”) processes on your behalf as a merchant using the eStack platform, and why. It applies across all sales channels eStack connects to, including Amazon, Walmart, eBay, and Shopify.

What we process

To provide order management, fulfillment, inventory, and demand planning across your connected sales channels, eStack processes:

• Order data: order ID, line items, quantities, order value, order status, timestamps
• Customer contact and shipping information: name, shipping address, phone number, and (where applicable) email, as provided by the channel for the purpose of fulfilling an order
• Product and inventory data: SKUs, stock levels, product identifiers
• Channel account credentials: OAuth tokens and API credentials needed to connect to your sales channels, stored encrypted, never logged in plaintext

We do not process payment card numbers, financial account numbers, or government identification numbers. Payment processing is handled entirely by your sales channels and payment providers, not by eStack.

Why we process it

Data	Purpose
Order and line item data	Import orders, decrement inventory, generate pick/pack/ship workflows, sync fulfillment status back to the originating channel
Customer name	Packing slips, shipping labels
Shipping address	Generate shipping labels, route fulfillment to the correct warehouse or 3PL, meet carrier delivery requirements
Phone number	Carrier delivery requirements where applicable (e.g., certain freight or signature-required shipments)
Product/inventory data	Sync stock levels across your connected channels, demand planning, purchase order generation
Channel credentials	Maintain your channel connections so orders continue to sync without repeated manual reauthorization

We do not use this data for marketing, advertising, or any purpose unrelated to operating your store through eStack. We do not sell customer data, and we do not share it with third parties beyond what’s needed to fulfill your orders (for example, shipping carriers).

How long we keep it

Order and customer data is generally retained for the life of the order record. Retention specifics vary by channel, based on each channel’s own requirements.

Amazon orders are anonymized automatically: buyer name, address, phone, and email are cleared approximately 30 days after the order ships, a purge specific to Amazon’s data retention requirements.

Shopify orders are retained until a valid deletion request is received, from the customer, the merchant, or upon the store’s closure, and handled through Shopify’s own mandatory compliance mechanisms rather than a fixed timer.

Walmart and eBay currently follow the same retention as the general policy above; a time-based anonymization matching Amazon’s approach is planned for these two channels.

In every case, data tied to a specific customer is deleted or anonymized upon a valid deletion request, or upon your account’s closure, subject to any legal retention obligations we’re required to meet.

How we protect it

• Encrypted at rest and in transit
• Encrypted backups
• Access limited to staff who need it to operate or support the platform, with access logging
• Channel credentials (OAuth tokens, API keys) stored encrypted and scoped per merchant account, never shared across accounts

Your choices

You control which sales channels are connected to your eStack account and can disconnect a channel at any time from Store Settings. Disconnecting a channel stops new data from syncing; existing order history remains available in eStack for your own records unless you request deletion.

Questions

Contact support@estack.com with any questions about how eStack processes your data.