Best Prototyping Tools in 2025

An online environment for prototyping modern web apps without coding and in real time. JitBlox seamlessly integrates popular UI libraries such as Bootstrap and Material Design and lets you download your app's source code with a single click.

Key JitBlox features:

Integrated visual designer Integrates popular UI libraries Interactive toolbox Real-time preview

freemium $15.0 / Monthly

Build powerful web apps, and create your custom agentic AI apps, no code needed!

Key Momen features:

Real-time preview Momen AI Infinite canvas Custom components

Visit website freemium

A cross-platform modular synthesizer.

Key VCV Rack features:

Modular Flexibility Cost-Effective Community and Support Expandability

Open Source

Pd (aka Pure Data) is a real-time graphical programming environment for audio, video, and graphical...

Key Pure Data features:

Open Source Cross-Platform Visual Programming Extensible

🔥 Design real websites right on the canvas.

Key Framer features:

Interactive Prototyping Code-based Design Real-time Collaboration Rich Component Library

Open Source

Appsmith is an open source web framework for building internal tools, admin panels, dashboards, and workflows.

Key Appsmith features:

Open Source Easy Integration Drag-and-Drop Interface Pre-built Widgets

Open Source

A real time audio synthesis engine, and an object-oriented programming language specialised for...

Key SuperCollider features:

Powerful Synthesis Engine Extensive Library of Ugens Flexibility Cross-Platform

Open Source

TouchDesigner is a visual development platform that equips you with the tools you need to create stunning realtime projects and rich user experiences.

Key TouchDesigner features:

Versatility Real-Time Capabilities Node-Based Workflow High Customizability

Cabbage is a framework for audio software development. Using simple markup text and the Csound audio synthesis language users can target four major operating...

Key Cabbage Studio features:

Open Source Cross-Platform Integration with Csound Real-Time Audio Processing

Powerful desktop app for creating responsive websites using the Bootstrap framework.

Key Bootstrap Studio features:

Intuitive Interface Responsive Design Pre-Designed Components Live Preview

Design freedom for teams.

Key Penpot features:

Open Source Cross-Platform Collaboration Features Integrations

Open Source

Modular synthesizer built with Nim.

Key NimSynth features:

Lightweight Open Source Cross-platform Efficient Performance

Open source framework and tool set for building virtual instruments.

Open-source virtual modular synthesizer plugin.

Key DISTRHO Cardinal features:

Open Source Modular Environment Cross-Platform Versatile Plugin Support