REI3

REI3 is an open‑source low‑code platform that lets users create and run multi‑user business applications without relying on cloud‑only SaaS. It provides a self‑hostable environment where data stores, forms, workflows, and access policies can be defined, and it includes built‑in support for REST calls, CSV import/export, and calendar integration. The platform offers features such as Gantt chart visualisation, full‑text search, end‑to‑end encryption with key management, and mobile‑ready progressive web app capabilities.

Target users are organisations and developers who need to replace spreadsheet‑based solutions with custom tools for tasks like time tracking, asset management, request handling, and secure password sharing. Because REI3 runs on standard Linux and Windows servers, it can be deployed on‑premise or in private clouds, giving full control over data location and compliance. The system supports role‑based access, LDAP integration, MFA, and other security mechanisms, making it suitable for both small teams and larger enterprises.

What distinguishes REI3 is its combination of a free MIT‑licensed codebase, a stable production‑ready release, and a suite of enterprise‑grade features such as clustering, customizable branding, and extensible applications. Users can share, sell, or independently host the applications they build, while benefiting from regular updates and a transparent, human‑readable database.