The short answer. For low-fidelity wireframes, Balsamiq. For interactive, conditional prototypes, ProtoPie or Axure. For design and prototype in one tool, Figma or Framer. For a free open-source tool that does both, Pencil. For quick click-through mockups, Flinto or Marvel. The deciding question is fidelity: a wireframe is meant to be argued with, and a high-fidelity prototype is meant to be demonstrated. Choosing the wrong fidelity wastes the meeting either way.
This guide covers 10 wireframing and prototyping tools for macOS. Every fact below is drawn from the same verified records that back each app’s own page. The recommendations are our editorial judgment, not payment.
Quick comparison
| App | What it is | Pricing | Licence | Version |
|---|---|---|---|---|
| Axure RP 8 | interface design tool | not published | not published | 11.0.0.4150 |
| Balsamiq Mockups | interface design tool | not published | not published | — |
| Flinto | design tool | not published | not published | — |
| Framer | design tool | not published | not published | 2026.39.0 |
| Justinmind | design tool | not published | not published | 10.4 |
| Marvel | design tool | Free | not published | 11.5 |
| MockFlow | design tool | not published | not published | — |
| Mockplus | design tool | not published | not published | — |
| pencil | design tool | Open source | GPL-2.0 | 3.1.1 |
| ProtoPie | design tool | not published | not published | 9.0.0 |
What actually decides this
- Fidelity, and what it protects you from. Low fidelity invites structural feedback; high fidelity invites pixel feedback. Both are useful, and asking for the wrong one in the wrong meeting is the most common way this category wastes time.
- Where the file lives. A cloud document is shareable and dependent on a service. A local file is yours and harder to share. For client work that distinction is often the deciding factor.
- Whether interactions are conditional. Linear click-throughs are easy. Conditional logic, variables and data-driven states are what separate a prototype from a slideshow, and only some tools do them.
- What it hands to developers. Specifications, measurements and asset export are separate features from prototyping. If the output has to be buildable, check this before choosing on the prototype side.
Our picks
- Balsamiq Mockups — Its record describes a wireframing tool, which is the low-fidelity case and a real product rather than a mode. Choose it when you want deliberately low-fidelity wireframes for structural discussion.
- ProtoPie — Its record describes creating advanced prototypes, which is the high-fidelity interactive case. Choose it when the prototype needs conditional logic and variables, not just taps.
- Axure RP 8 — Its record describes prototypes, specifications and diagrams in one tool, which is the documentation-heavy case. Choose it when you need specifications and diagrams alongside the prototype.
- pencil — Its record describes a free open-source tool for diagrams and GUI prototyping, which is the free case. Choose it when you want a free open-source tool for diagrams and GUI prototyping.
- Flinto — Its record describes creating interactive prototypes quickly, which is the speed-first case. Choose it when you want quick interactive prototypes of a mobile or desktop app.
The apps
Axure RP 8
Axure RP 8 is an interface design tool for macOS. Prototypes, specifications and diagrams in one tool. Its pricing is not published.
What it does. All-in-one software design tool for creating prototypes, specifications, and diagrams.
Axure RP 8 is listed with current version 11.0.0.4150.
Full profile and verified facts for Axure RP 8 →
Balsamiq Mockups
Balsamiq Mockups is an interface design tool for macOS. Wire-framing tool that helps you work faster and smarter. Its pricing is not published.
What it does. Balsamiq is the fast, low-fidelity wireframing tool for lean product teams. Sketch, test, and refine UI ideas effortlessly. Try it free today!
Full profile and verified facts for Balsamiq Mockups →
Flinto
Flinto is a design tool for macOS. Quickly create interactive prototypes of mobile, desktop, or web apps. Its pricing is not published.
What it does. The App Design App.
Full profile and verified facts for Flinto →
Framer
Framer is a design tool for macOS. Tool for interactive prototyping. Its pricing is not published.
What it does. Go from idea to launch with an agent that designs and builds on the canvas. Keep each change editable, with hosting, security, analytics, CMS, and SEO built in.
Framer is listed with current version 2026.39.0.
Full profile and verified facts for Framer →
Justinmind
Justinmind is a design tool for macOS. Prototyping platform for web and mobile apps. Its pricing is not published.
What it does. Easily create web and mobile app prototypes and wireframes with Justinmind UI prototyping tool. It’s FREE. Start prototyping now!
Justinmind is listed with current version 10.4.
Full profile and verified facts for Justinmind →
Marvel
Marvel is a design tool for macOS. Simple design, prototyping and collaboration. It is free.
What it does. The collaborative design platform. Wireframe, prototype, user test, design and inspect designs in one place, for free! Or create an integration with our API.
Marvel is listed with current version 11.5.
Full profile and verified facts for Marvel →
MockFlow
MockFlow is a design tool for macOS. Online prototyping suite for web-design and usability testing. Its pricing is not published.
What it does. MockFlow is a super-easy wireframing tool & AI online whiteboard for teams to diagram & brainstorm. Create wireframes, flowcharts, mind maps & more.
Full profile and verified facts for MockFlow →
Mockplus
Mockplus is a design tool for macOS. Prototype faster, smarter and easier. Its pricing is not published.
What it does. All-in-one product design platform for prototyping, collaboration, and creating design systems.
Full profile and verified facts for Mockplus →
pencil
pencil is a design tool for macOS. Free, open-source tool for making diagrams and GUI prototyping. It is released under GPL-2.0.
What it does. The Pencil Project’s unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.
pencil is listed with current version 3.1.1.
Full profile and verified facts for pencil →
ProtoPie
ProtoPie is a design tool for macOS. Create the most advanced prototypes as easy as Pie. Its pricing is not published.
What it does. Use AI to generate interactions, perfect them credit-free, and hand off clean specs.
ProtoPie is listed with current version 9.0.0.
Full profile and verified facts for ProtoPie →
How to choose
- Free of charge. Marvel — no payment is required.
- No licence fee, source available. pencil — the source can be read and, under the terms of each licence, reused.
- Pricing not published in our data. Axure RP 8, Balsamiq Mockups, Flinto, Framer, Justinmind, MockFlow, Mockplus and ProtoPie — check the developer’s own site before assuming anything about cost.
Open source: pencil (1 of 10).
Common mistakes
- Presenting a high-fidelity prototype when you wanted feedback on structure. The conversation will be about the corner radius.
- Presenting a low-fidelity wireframe to a stakeholder who needed to see the product. They will not be able to imagine it.
- Choosing a tool for its prototype features when the deliverable is a specification.
- Prototyping an interaction that cannot be built on the target platform. Test the constraint before you draw it.
How this guide was put together
Each app’s facts come from its own record: the developer’s own pages and repository, the App Store listing where one exists, and the documentation, each with a source grade and an access date. Where a fact rests on the developer’s own statement rather than on something we verified independently, the sentence says so. Where our data has no value for something, the guide says “not published” instead of guessing.
A price appears here only where the record carries one from a stated source; the guide never estimates one, and it records the pricing model alongside so the two can be read together. Prices change and vary by region, so each app links to its own page for the current detail.
The facts and the recommendations are kept apart on purpose. Everything in the app entries, the comparison table and the answers above is composed from the records. The short answer, the criteria and the picks are our editorial judgment: they reflect what we would choose and why, and they are not paid for. Where we make a recommendation we name the condition it applies under, because we do not call anything “the best” without explaining the criteria.
Frequently Asked Questions
How do I choose between these wireframing and prototyping tools?
There is no single answer — it depends on what you need. This guide covers 10 wireframing and prototyping tools: Axure RP 8, Balsamiq Mockups, Flinto, Framer, Justinmind, Marvel, MockFlow, Mockplus, pencil and ProtoPie. They differ mainly in pricing model, licence and the trade-offs each one carries. Pick by the trade-off you care about rather than by rank.
Are these wireframing and prototyping tools free?
Pricing across this group: not published (Axure RP 8, Balsamiq Mockups, Flinto, Framer, Justinmind, MockFlow, Mockplus and ProtoPie), free (Marvel) and open source (pencil). Where we list pricing as not published, the developer does not state a model we could verify — check their own site before assuming anything about cost. We quote a price only where the record carries one from a stated source, and we never estimate one. Prices change and vary by region and by store, so always check the developer’s own page for the current figure.
Which of these wireframing and prototyping tools are open source?
pencil (GPL-2.0) is open source.
Do these wireframing and prototyping tools support Apple Silicon?
Our data does not carry an explicit Apple Silicon statement for any app in this group, so we do not claim one. The absence of a statement is not the same as the absence of support.
How do I choose between them?
Start with how you pay: the guide groups these apps by pricing model, because the budget is the constraint most people actually have. Then check the trade-offs listed for each app: the limitations are the part that decides most people’s choice, because they describe what the app will not do for you.
