Top 10 Open Source Alternatives to Justinmind in 2025

As the demand for advanced UI/UX tools continues to grow, Justinmind faces competition from several open-source alternatives. These alternatives cater to designers, developers, and product managers looking for robust, customizable, and collaborative tools. Here's a detailed look at the top 10 open-source alternatives to Justinmind in 2025.

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1. Figma

Website: Figma
Description: While not strictly open-source, Figma offers a very generous free tier and is a dominant player in the design and prototyping space. It's a collaborative, browser-based tool that's widely used by both designers and developers.
Data Points:
Collaboration: Real-time, multi-user editing and commenting.
Prototyping: Offers interactive prototyping with transitions and animations.
Accessibility: Browser-based, accessible on any OS with a browser.
Community: Huge community with plugins and resources.
Fidelity: Suitable for high-fidelity designs.

2. Penpot

Website: Penpot
Description: Penpot is an open-source design and prototyping platform focused on cross-platform collaboration and accessibility.
Data Points:
Open Source: Fully open-source and self-hostable.
Collaboration: Designed for collaborative workflows between designers and developers.
Accessibility: Browser-based, accessible across operating systems.
Prototyping: Includes basic prototyping features.
Fidelity: Suitable for both low and high fidelity designs.

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3. Origami Studio

Website: Origami Studio
Description: Originally created for Facebook designers, it's now a free prototyping tool known for its advanced features, particularly for mobile app prototyping.
Data Points:
Free: Completely free to download and use.
Advanced Prototyping: Suitable for complex interactions and animations.
Mobile Focus: Ideal for creating native iOS and Android interfaces.
Components: Offers a patch library to create interactions and animations.
Hardware API: Can be used to unlock hardware capabilities.

4. Pencil Project

Description: Pencil Project is a free, open-source UI prototyping tool, offering a wide array of shapes and tools for creating user interfaces.
Data Points:
Open Source: Free and open-source.
Multi-Platform: Works across multiple platforms.
Prototyping: Supports multi-page linking for simulating navigation flows.
Shape Library: Has a library of shapes for creating interfaces.
Export Options: Export options to PDF and SVG formats.

5. MockFlow

Website: MockFlow
Description: A web-based prototyping tool that aims for ease of use, speed, and quick prototyping, it's also great for brainstorming and gathering feedback.
Data Points:
Ease of Use: Simple and intuitive interface.
Rapid Prototyping: Good for quick and simple prototyping tasks.
Collaboration: Facilitates team collaboration.
Feedback: Designed to help gather feedback.
Web-Based: Accessible through a web browser.

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6. Mockplus

Website: Mockplus
Description: A prototyping tool that focuses on rapid prototyping with drag-and-drop functionality and a library of components.
Data Points:
Speed: Known for quick prototyping capabilities.
Components: Offers a library of pre-built components, icons, and templates.
Collaboration: Supports real-time collaboration.
Integration: Seamlessly integrates with other design tools.
Drag-and-Drop: Offers an easy-to-use drag-and-drop functionality.

7. Vectr

Website: Vectr
Description: A simple graphics editor for creating basic prototypes, wireframes, and mockups.
Data Points:
Free: A free graphic editor.
Low-Fidelity: Best suited for low-fidelity prototypes.
Simple: Easy-to-use interface.
Export Options: Export to PNG, JPG, or SVG.
Web-Based: Can be used in a browser.

8. Miro

Website: Miro
Description: Miro is a visual collaboration platform and is more than just a prototyping tool, it also allows brainstorming and idea generation.
Data Points:
Visual Workspace: Versatile for innovation and collaboration.
Prototyping: Includes tools for creating interactive prototypes.
Collaboration: Designed for real-time team collaboration.
Integration: Can integrate with many different tools.
Versatile: Can be used for diagrams and wireframes.

9. LVGL (with SquareLine Studio)

Website: LVGL & SquareLine Studio
Description: LVGL is an open-source embedded graphics library, and SquareLine Studio is a UI editor that works with it.
Data Points:
Open Source: LVGL is open-source and has no external dependencies.
Embedded Focus: Ideal for creating UIs on MCUs and other embedded systems.
Customizable: Has 30+ built-in tools, 100+ style attributes, and a web-inspired layout manager.
Drag-and-Drop: SquareLine studio offers drag-and-drop functionality.
No External Dependencies: Easy to port and use for embedded systems.

10. Avocado (Built on Origami)

Website: Avocado
Description: An open-source interaction design toolbox by IDEO, built on Facebook's Origami framework, designed for creating quick interactive prototypes without coding.
Data Points:
Open Source: Open-source tool.
Code-Free: Allows creation of prototypes without writing code.
Interactive: Designed for creating interactive prototypes.
Origami Framework: Built on the same framework as Origami Studio.
Customizable: Offers ready-to-use patches for customization.

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FAQ

1. What is Figma?

Figma is a collaborative, browser-based design and prototyping tool, widely used by designers and developers for high-fidelity designs. Learn more about Figma

2. What features does Penpot offer?

Penpot is an open-source design and prototyping platform that focuses on cross-platform collaboration, accessibility, and is self-hostable. Discover Penpot

3. What makes Origami Studio unique?

Origami Studio, originally designed for Facebook designers, is a free prototyping tool known for its advanced features for mobile app prototyping. Explore Origami Studio

4. What is the Pencil Project used for?

Pencil Project is an open-source UI prototyping tool that offers a wide array of shapes and tools for multi-page linking and exporting to various formats.

5. How does MockFlow facilitate prototyping?

MockFlow offers a simple and intuitive interface for quick and simple prototyping tasks, as well as features for team collaboration and feedback collection. Learn more about MockFlow

6. What are the strengths of Mockplus?

Mockplus focuses on rapid prototyping with drag-and-drop functionality and a library of pre-built components and templates, along with real-time collaboration support. Discover Mockplus

7. What can Vectr be used for?

Vectr is a free graphic editor designed for creating low-fidelity prototypes and wireframes. Explore Vectr

8. How does Miro enhance collaboration?

Miro is a visual collaboration platform used for brainstorming, idea generation, and interactive prototyping in a versatile visual workspace. Learn more about Miro

9. What is LVGL and SquareLine Studio ideal for?

LVGL is an open-source embedded graphics library ideal for creating UIs on MCUs and other embedded systems, with SquareLine Studio providing drag-and-drop functionality. Discover LVGL | Explore SquareLine Studio

10. What is Avocado by IDEO?

Avocado is an open-source interaction design toolbox built on Facebook's Origami framework, designed to create quick interactive prototypes without coding.

About the Author

Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.

Violetta is a true multiple specialist who has built expertise in Linguistics, Education, Business Management, Blockchain, Entrepreneurship, Intellectual Property, Game Design, AI, SEO, Digital Marketing, cyber security and zero code automations. Her extensive educational journey includes a Master of Arts in Linguistics and Education, an Advanced Master in Linguistics from Belgium (2006-2007), an MBA from Blekinge Institute of Technology in Sweden (2006-2008), and an Erasmus Mundus joint program European Master of Higher Education from universities in Norway, Finland, and Portugal (2009).

She is the founder of Fe/male Switch, a startup game that encourages women to enter STEM fields, and also leads CADChain, and multiple other projects like the Directory of 1,000 Startup Cities with a proprietary MeanCEO Index that ranks cities for female entrepreneurs. Violetta created the "gamepreneurship" methodology, which forms the scientific basis of her startup game. She also builds a lot of SEO tools for startups. Her achievements include being named one of the top 100 women in Europe by EU Startups in 2022 and being nominated for Impact Person of the year at the Dutch Blockchain Week. She is an author with Sifted and a speaker at different Universities. Recently she published a book on Startup Idea Validation the right way: from zero to first customers and beyond and launched a Directory of 1,500+ websites for startups to list themselves in order to gain traction and build backlinks.

For the past several years Violetta has been living between the Netherlands and Malta, while also regularly traveling to different destinations around the globe, usually due to her entrepreneurial activities. This has led her to start writing about different locations and amenities from the POV of an entrepreneur. Here’s her recent article about the best hotels in Italy to work from.

About the Publication

Fe/male Switch is an innovative startup platform designed to empower women entrepreneurs through an immersive, game-like experience. Founded in 2020 during the pandemic "without any funding and without any code," this non-profit initiative has evolved into a comprehensive educational tool for aspiring female entrepreneurs.The platform was co-founded by Violetta Shishkina-Bonenkamp, who serves as CEO and one of the lead authors of the Startup News branch.

Mission and Purpose

Fe/male Switch Foundation was created to address the gender gap in the tech and entrepreneurship space. The platform aims to skill-up future female tech leaders and empower them to create resilient and innovative tech startups through what they call "gamepreneurship". By putting players in a virtual startup village where they must survive and thrive, the startup game allows women to test their entrepreneurial abilities without financial risk.

Key Features

The platform offers a unique blend of news, resources,learning, networking, and practical application within a supportive, female-focused environment:

Skill Lab: Micro-modules covering essential startup skills
Virtual Startup Building: Create or join startups and tackle real-world challenges
AI Co-founder (PlayPal): Guides users through the startup process
SANDBOX: A testing environment for idea validation before launch
Wellness Integration: Virtual activities to balance work and self-care
Marketplace: Buy or sell expert sessions and tutorials

Impact and Growth

Since its inception, Fe/male Switch has shown impressive growth:

3,000+ female entrepreneurs in the community
100+ startup tools built
5,000+ pieces of articles and news written

Partnerships

Fe/male Switch has formed strategic partnerships to enhance its offerings. In January 2022, it teamed up with global website builder Tilda to provide free access to website building tools and mentorship services for Fe/male Switch participants.

Recognition

Fe/male Switch has received media attention for its innovative approach to closing the gender gap in tech entrepreneurship. The platform has been featured in various publications highlighting its unique "play to learn and earn" model.