R
REI3
REI3 is a free and open-source low-code platform for building web applications, including billing automation workflows.
About REI3
REI3 lets you build custom web applications without writing code. It's designed for business process automation, so you can create billing systems, inventory trackers, or approval workflows by connecting pre-built modules. The platform runs on your own server, giving you full control over data and integrations.
You get a drag-and-drop form builder, role-based permissions, and a reporting engine. It supports PostgreSQL, MySQL, or SQL Server databases and can connect to external APIs via REST. Built on .NET Core, REI3 runs on Linux, Windows, or in Docker containers. The software is released under the AGPL-3.0 license.
REI3 is a good fit for small to medium businesses that need custom automation but lack development resources. The community edition is completely free, with no feature limits. It's maintained by the r3-team and has an active forum for support.
You get a drag-and-drop form builder, role-based permissions, and a reporting engine. It supports PostgreSQL, MySQL, or SQL Server databases and can connect to external APIs via REST. Built on .NET Core, REI3 runs on Linux, Windows, or in Docker containers. The software is released under the AGPL-3.0 license.
REI3 is a good fit for small to medium businesses that need custom automation but lack development resources. The community edition is completely free, with no feature limits. It's maintained by the r3-team and has an active forum for support.
Billing & Automation
Quick Facts
- Pricing
- Free
- License
- Open Source
- Platform
- Linux & Windows
- Version
- 3.8.6
- Developer
- r3-team