Open Source Everything

Internal tool builders

Build admin panels and internal apps quickly.

8open alternatives 6do the whole job
Replaces

Open alternatives8

Open-source apps that replace Retool

No screenshot yet
41kActiveAGPL-3.0Runs on your own server

ToolJet is a platform for building internal tools such as admin panels, dashboards and operational apps on top of your existing databases and services. It is aimed at teams that need custom work tools, and it can be self-hosted or used as a cloud service.

Runs on your own server · GitHub
No screenshot yet
41kActiveIn your browserApache-2.0For developers

Appsmith is a platform for building internal business tools such as dashboards and admin panels. It is aimed at teams and organizations that need custom apps for their own staff.

For developers · GitHub
Budibase screenshot
28kActiveGPL-3.0Open coreRuns on your own server

Budibase is an open-source platform for building internal business apps, automations and AI agents without writing much code. It is for teams that want to run their internal tools and workflows on their own servers or on Budibase's cloud.

Runs on your own server · GitHub
Windmill screenshot
18kActiveWindowsAGPL-3.0Open coreRuns on your own server

Windmill is a platform where engineers write small scripts that automatically become web forms, APIs, scheduled jobs, workflows and internal apps. It is aimed at companies that want engineers and business teams to build internal tools together.

Runs on your own server · GitHub
No screenshot yet
12kActiveApache-2.0Runs on your own server

ILLA Builder is a tool for developers to quickly build internal business tools, such as admin panels and dashboards, by dragging ready-made components onto a canvas and connecting them to databases or APIs. It is aimed at programmers and teams who need custom internal software.

Runs on your own server · GitHub
Openblocks screenshot
6.2kQuiet for a yearAGPL-3.0Runs on your own server

Openblocks is a tool for building internal business apps, such as dashboards and admin panels, by connecting to databases and APIs and arranging ready-made components on screen. It is aimed at software teams and companies that need custom tools for their staff or customers.

Runs on your own server · GitHub
Lowdefy screenshot
3kActiveApache-2.0Replaces partlyFor developers

Lowdefy is a framework where you describe a web app in YAML config files instead of writing code, and it runs the app for you. It is aimed at developers and teams who build internal business tools.

For developers · GitHub
No screenshot yet
1.9kQuiet for a yearAGPL-3.0Replaces partlyRuns on your own server

DashPress turns a database into a ready-made admin dashboard for managing its records. It is aimed at developers and teams who need an internal admin panel without writing much code.

Runs on your own server · GitHub

What's missing

What people still miss here, and wish existed. Upvote what matters to you.

Before you build

Planning something for internal tool builders? See what exists first, so you can reuse parts or explain what's different. Paste this into any AI assistant:

Read the list of open-source alternatives at https://opensourceeverything.org/data/groups/internal-tools.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do. My project or idea:
Download the list

Fix the list itself

A project or closed app missing from this list, or a mistake on it? These open a short form on GitHub, and a mod reviews it. To say what a project can't do, use What's missing.

About this page

Replaces fully means it does the main job of these apps; Replaces partly means it covers some of it.

Licenses: every project here uses an open-source license (what each one means). Open core means some parts are paid or under another license.

GitHub stars are shown for reference. They measure popularity, not whether it replaces anything.

Verified means r/TrueOpenSource mods checked it: open-source license, maintained, and it really does the job.

How Open Source Everything works