myWMS vs Sentry WMS

myWMS is an open-source framework for developing warehouse management systems. It supplies a data model and basic inventory-management services for WMS suppliers building systems for specific needs. Its communication interfaces connect to external systems, while internal interfaces allow plug-in modules to be exchanged. The maker describes the framework as independent of hardware and operating systems, and compatible with third-party products and modules. It is written in Java, and its source has been available under the GNU General Public License since March 2009. The maker offers myWMS LOS as a free download, including a demo for decision-makers. That demo uses a database the maker says should be replaced with a high-performance database for production use. Listed downloads include a Windows installer, an EAR package for JBoss, and source code. Documentation includes a user manual and a process description with an end-to-end example. The project started in 2001 as a research project initiated by Fraunhofer IML and funded by North Rhine-Westphalia. Platforms listed are Linux, Windows, web, and self-hosted; mobile app and barcode scanning are also listed. The demo plan costs nothing.

Sentry WMS is a free, self-hosted warehouse execution system for e-commerce businesses that already use a system of record or ERP. It handles receiving, storage, picking, packing, shipping, and counting, including multiple warehouses. Teams can batch orders for picking with serpentine walk-path optimization. Inventory tools include bin-level cycle counts with variance detection and admin approval, plus adjustments and transfers. Barcode lookup from the mobile app home screen can identify items, bins, purchase orders, or sales orders. An inbound API accepts updates for sales orders, items, customers, vendors, and purchase orders using source-specific YAML mappings and scoped WMS tokens. Its connector framework is intended for ERP and commerce platforms, but operators or developers must build the connectors; first-party ones are planned for v2.0.0. The documented deployment uses Docker Compose, a Flask API, PostgreSQL 16, a React admin panel, and a React Native Expo mobile app. The public project is under Apache-2.0 and documents encrypted connector credentials, a hash-chained audit log, and SSRF protections.