Spline is a powerful 3‑D design and UI‑UX prototyping tool that lets designers create interactive, immersive experiences. Looking for other platforms that enable rapid UI/UX prototyping, interactive mock‑ups, and 3‑D integration? Below is a curated list of 20 alternative software solutions.
Get targeted exposure with custom position pinning and highlighted placement.
Cloud‑based design system with real‑time collaboration, vector editing, and interactive prototyping; supports plugins for 3‑D assets.
Design and code platform for high‑fidelity interactive prototypes; includes physics‑based animations and 3‑D transforms.
Visual web‑design tool that generates clean HTML/CSS/JS; offers interactions, animations, and limited 3‑D transforms.
Vector‑based UI/UX design and prototyping suite with voice prototyping, auto‑animation, and integration with Adobe 3‑D tools.
Mac‑only vector design app with extensive plugin ecosystem; supports interactive prototyping via plugins like Anima.
All‑in‑one screen design, rapid prototyping, and animation tool with shared design systems.
Powerful wireframing and documentation tool for complex interactions, conditional logic, and data‑driven prototypes.
Web‑based design, prototyping, and user testing platform with simple hand‑off and integrations.
Browser‑based prototyping suite that lets you build fully interactive mobile and web prototypes without code.
Design system‑focused prototyping tool with advanced interactions, states, and logic for high‑fidelity mockups.
Collaboration and hand‑off platform that bridges design and development with style guides and assets.
Mac app for creating animated and interactive UI designs; excels at micro‑interactions and motion design.
Facebook‑built prototyping tool for complex interactions, gestures, and 3‑D transformations.
Open‑source design and prototyping platform with collaborative vector editing and interactive flows.
Free Windows‑native design app compatible with Sketch files; includes prototyping and asset management.
Web‑based 3‑D design tool with real‑time collaboration; integrates 3‑D models directly into UI prototypes.
Browser‑based 3‑D modeling, rendering, and animation platform; can embed interactive 3‑D scenes into prototypes.
Open‑source animation library for React that enables developers to prototype fluid UI interactions with 3‑D transforms.
Figma, Sketch, and Adobe XD plugin that converts designs into responsive, interactive HTML/CSS/React prototypes.
Low‑fidelity wireframing tool focused on rapid sketch‑style UI concepts and quick iteration.