Appsmith

Appsmith is an open source low-code platform that lets you build internal tools, dashboards, and CRUD applications by dragging components onto a canvas and connecting them to your databases or APIs. Because it's open source, you can self-host it, customize it deeply, and integrate it into your own infrastructure without vendor lock-in.

Pick Appsmith if your team needs flexibility and control over their tooling stack. It connects directly to 25+ databases and APIs (PostgreSQL, MongoDB, REST, GraphQL, and more), supports JavaScript for custom logic, and works well for teams who want to ship internal tools quickly without hiring frontend engineers.