Best Prototyping Software in 2026
Updated
In short: Fluid UI is ranked #1 of 30 as of 1 October 2026, ahead of Justinmind and Mockplus. The best-ranked option with a free plan is Justinmind. The lowest first paid tier on this page is Mockplus at $2.48/mo.
Prototyping software helps shape interface concepts into interactive experiences that can be shared and evaluated. This ranking orders 30 entries; compare interactive prototypes, prototype sharing, user testing, team collaboration, and conditional logic. Platform support, free-plan availability, and starting paid prices offer further points of comparison. UXPin and Justinmind appear near the start, followed by ProtoPie and Mockplus. Consider whether your work calls for conditional interactions, feedback from users, or collaboration around a shared prototype, then compare the listed capabilities and platform details to find relevant options.
30 prototyping software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
16 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Fluid UIWeb · Windows · Mac · Linux · Android · iPhone | Three bars | — | 6 of 6 | $8.25/mo | 6.7 | |
| 2 | JustinmindWeb · Windows · Mac · Android · iPhone · Self-hosted · API | Three bars | — | 5 of 6 | $19/mo | 6.7 | |
| 3 | MockplusWeb · Windows · Mac · Android · iPhone | Three bars | — | 5 of 6 | $2.48/mo | 6.7 | |
| 4 | ProtoPieWeb · Windows · Mac · Android · iPhone · Self-hosted · API | Three bars | — | 5 of 6 | $25/mo | 6.7 | |
| 5 | UXPinWeb · Windows · Mac · Android · iPhone | Three bars | — | 5 of 6 | $29/mo | 6.7 | |
| 6 | MarvelWeb · Android · iPhone · API | Three bars | — | 3 of 6 | $12/mo | 6.5 | |
| 7 | Proto.ioWeb · Android · iPhone | Three bars | — | 3 of 6 | $29/mo | 6.5 | |
| 8 | Wondershare MockittWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $10/mo | 6.5 | |
| 9 | Frame0Windows · Mac · Linux | Two bars | — | 3 of 6 | $79/mo | 6.4 | |
| 10 | PrototypeToolWeb | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 11 | VisilyWeb · Extension | Two bars | — | 1 of 6 | $14/mo | 6.4 | |
| 12 | AlloyExtension | Two bars | — | 0 of 6 | $20/mo | 6.3 | |
| 13 | UizardWeb · Extension | Two bars | — | 1 of 6 | $3.25/mo | 6.3 | |
| 14 | MoqupsWeb · Extension | One bar | — | 1 of 6 | $7/mo | 6.2 | |
| 15 | NinjaMockWeb | Two bars | — | 1 of 6 | Free | 6.2 | |
| 16 | Quant-UXWeb · Self-hosted | One bar | — | 1 of 6 | Free | 6.2 | |
| 17 | Figma SlidesWeb · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | $3/mo | 5.9 |
| 18 | MockappAndroid · iPhone | No signal | — | — | 2 of 6 | — | 5.2 |
| 19 | Origami StudioMac · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.2 |
| 20 | Pencil ProjectWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.2 |
| 21 | ProtoSketchiPhone | No signal | — | — | 1 of 6 | — | 5.2 |
| 22 | PVSio-WebWeb | No signal | — | — | 1 of 6 | — | 5.2 |
| 23 | ForeUIWindows · Mac · Linux | Two bars | — | — | 3 of 6 | €130/mo | 5.1 |
| 24 | Axure RPMac | One bar | — | — | 1 of 6 | $29/mo | 5.0 |
| 25 | Balsamiq WireframesWeb · Windows · Mac | Two bars | — | — | 3 of 6 | $16/mo | 5.0 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which prototyping software is ranked first on Freedom251?
Fluid UI is ranked #1 of 30 with a score of 6.7. Justinmind is second and Mockplus third.
How many of these have a free plan?
16 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Mockplus has the lowest first paid tier we found: $2.48/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.