Top 10 Open Source Alternatives to Mockplus in 2025: A Comprehensive Comparison

As the landscape of design and prototyping tools evolves, 2025 offers a range of innovative, open source alternatives to Mockplus. Whether you're seeking collaboration features, offline capabilities, or expansive design tools, this article explores the top 10 open source alternatives based on key features and capabilities.

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1. Penpot

Description: Penpot is a free, open-source, web-based design and prototyping platform emphasizing collaboration between designers and developers. It's cross-platform and browser-based, making it highly accessible.
Key Features:
Real-time collaborative editing.
Design and prototyping capabilities.
Easy conversion of designs to code.
Suitable for both UI design and wireframing.
A variety of design tools and features.
Data Points:
Open Source: Yes.
Collaboration: Strong real-time collaboration features.
Accessibility: Web-based and cross-platform.
Primary Use: Design and prototyping.
User Type: Individuals, teams, and organizations. Explore Penpot

2. Pencil Project

Description: Pencil Project is an open-source GUI application for creating wireframes, mockups, and prototypes. It can be downloaded and used offline.
Key Features:
Pre-built stencils and templates for quick wireframing.
Diagramming capabilities.
Interactive elements.
Can be downloaded for offline use.
Available as a Firefox add-on.
Data Points:
Open Source: Yes.
Offline Use: Available for offline use.
Templates: Offers a range of templates for web and mobile.
Diagramming: Strong diagramming tools and interactive elements.
Primary Use: Wireframing, Mockups. Explore Pencil Project

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3. Draw.io

Description: Draw.io is a free, open-source, browser-based diagramming application that can be used for creating wireframes and other visual representations of ideas.
Key Features:
Browser-based, no account needed.
Wide range of shapes and connectors.
Easy to use interface.
Can export in multiple formats.
Suitable for wireframes and flowcharts.
Data Points:
Open Source: Yes.
Accessibility: Browser-based.
Ease of Use: Simple and intuitive interface.
Primary Use: Wireframing, Diagramming.
Offline Use: Can be used offline via desktop application. Discover Draw.io

4. Figma

Description: Figma is a popular, cloud-based design and prototyping tool that is frequently mentioned as a top alternative to Mockplus. While it's not entirely open-source, it does have a very generous free tier, making it accessible.
Key Features:
Real-time collaboration.
Strong design and prototyping features.
Large library of plugins.
Works on a browser.
Flexible styling options.
Data Points:
Open Source: No, but has a generous free tier.
Collaboration: Excellent real-time collaboration.
User Base: Highly popular within the UI/UX community.
Primary Use: UI Design, Prototyping, Wireframing.
Plugins: Extensible with various plugins. Learn more about Figma

5. Miro

Description: Miro is an AI-enabled virtual whiteboard platform for real-time collaboration and design. While not exclusively a wireframing tool, it is excellent for team collaboration on early design stages.
Key Features:
Real-time collaboration and visual communication.
Ideal for brainstorming and early design phases.
Integration with other apps.
Large variety of templates.
AI capabilities.
Data Points:
Open Source: No.
Collaboration: Designed for team collaboration.
Primary Use: Brainstorming, early design, wireframing.
Templates: Large selection of pre-made templates.
AI: Includes AI features. Explore Miro

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6. Wireframe.cc

Description: Wireframe.cc is a minimalist, browser-based tool for creating simple, low-fidelity wireframes. It focuses on the basics of wireframing, making it very straightforward to use.
Key Features:
Minimalist design approach.
Easy to learn and use.
Browser-based, no account required.
Ideal for low-fidelity wireframes.
Quick and simple tool.
Data Points:
Open Source: No.
Accessibility: Browser-based.
Ease of Use: Very simple and intuitive.
Primary Use: Low-fidelity wireframing.
Complexity: Limited features for advanced prototyping. Discover Wireframe.cc

7. Balsamiq

Description: Balsamiq is a rapid wireframing tool that facilitates collaborative mockup creation. It's known for its sketchy, hand-drawn style.
Key Features:
Rapid wireframing capabilities.
Collaborative features for teams.
User testing capabilities.
Sketchy, hand-drawn style.
Easy to use.
Data Points:
Open Source: No.
Collaboration: Team-focused collaborative features.
Style: Unique sketchy, hand-drawn style.
User Testing: Allows user testing.
Primary Use: Rapid Wireframing. Learn more about Balsamiq

8. Adobe XD

Description: Adobe XD is a UI/UX design and prototyping tool that is part of the Adobe suite. It offers a wide range of features that make it suitable for a complete design workflow.
Key Features:
Design, prototyping, and collaboration capabilities.
User interface focused tools.
Templates that are optimized for user experience design.
Integration with other Adobe products.
Interactive features.
Data Points:
Open Source: No.
Integration: Works well within the Adobe ecosystem.
User Experience: Templates optimized for UX design.
Primary Use: UI Design, Prototyping.
Features: Wide array of UI/UX design features. Explore Adobe XD

9. Sketch

Description: Sketch is a popular design tool mainly for MacOS users, well known for its wireframing capabilities and resources.
Key Features:
Native MacOS app.
Vast resources and wireframe kits available.
Collaboration Features.
Repeatable components that can be changed sitewide.
Easy to use user interface.
Data Points:
Open Source: No.
User Base: Ideal for MacOS users.
Primary Use: Wireframing.
Features: Variety of features and resources available.
Collaboration: Collaboration capabilities. Discover Sketch

10. Avocado

Description: Avocado is an open-source interaction design toolbox built by IDEO. It allows creating interactive prototypes without coding, based on Facebook's Origami framework.
Key Features:
Open-source tool.
Interactive prototypes without code.
Ready-to-use patches for customized prototypes.
Built on Facebook's Origami framework.
Quick prototyping capabilities.
Data Points:
Open Source: Yes.
Code-Free: Allows creating interactive prototypes without code.
Framework: Built on top of Facebook's Origami framework.
Primary Use: Interactive prototyping.
Customization: Offers ready-to-use patches for customization. Learn more about Avocado

This list provides a mix of fully open-source tools and those with strong free plans, all of which are viable alternatives to Mockplus in 2025. I've included the key features and data points to give you a comprehensive overview.

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FAQ

1. What are some open-source alternatives to Mockplus for 2025?

Penpot, Pencil Project, Draw.io, and Avocado are excellent open-source alternatives to Mockplus. Learn more about Penpot | Discover Pencil Project | Explore Draw.io | Learn more about Avocado

2. How does Penpot enhance collaboration in design?

Penpot offers real-time collaborative editing, making it easy for teams to work together on design projects. Learn more about Penpot

3. Can Pencil Project be used offline?

Yes, Pencil Project can be downloaded and used offline. Discover Pencil Project

4. Is Draw.io suitable for wireframing?

Yes, Draw.io is suitable for creating wireframes and other visual representations of ideas. Explore Draw.io

5. Does Figma have open-source capabilities?

Figma is not fully open-source, but it has a generous free tier, making it accessible for users who need robust design and prototyping tools. Learn more about Figma

6. What makes Miro ideal for team collaboration?

Miro is designed for real-time collaboration, making it perfect for team brainstorming and early design phases. Discover Miro

7. What is Wireframe.cc best used for?

Wireframe.cc is best for creating simple, low-fidelity wireframes quickly and easily. Explore Wireframe.cc

8. Why is Balsamiq known for its unique style?

Balsamiq features a sketchy, hand-drawn style that is distinct and user-friendly for rapid wireframing. Discover Balsamiq

9. How does Adobe XD integrate with other Adobe products?

Adobe XD works seamlessly within the Adobe ecosystem, offering powerful UI/UX design and prototyping tools. Learn more about Adobe XD

10. What framework is Avocado based on?

Avocado is built on top of Facebook's Origami framework, allowing for quick and interactive prototyping without coding. Learn more about Avocado

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.