Best UI Design Tools in 2026
Updated
In short: Fluid UI is ranked #1 of 37 as of 4 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 Lunacy at $1/mo.
UI design tools help you shape interfaces, build interactive prototypes, and prepare design work for collaboration and handoff. Compared on design systems, interactive prototyping, prototype sharing, real-time collaboration, and variables tokens, these entries cover several parts of that process. Developer handoff and desktop app availability are useful details to weigh against your workflow, while free plans and paid-from pricing help you compare access and cost. Fluid UI, Justinmind, and Mockplus are among the tools included, as are ProtoPie and UXPin. Consider which capabilities matter most for the interfaces you create and how you work with others.
37 UI design tools 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 | 6.8 | |
| 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 | LunacyWeb · Windows · Mac · Linux · Self-hosted | Three bars | — | 4 of 6 | $1/mo | 6.6 | |
| 7 | MarvelWeb · Android · iPhone · API | Three bars | — | 3 of 6 | $12/mo | 6.5 | |
| 8 | Proto.ioWeb · Android · iPhone | Three bars | — | 3 of 6 | $29/mo | 6.5 | |
| 9 | Wondershare MockittWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | $10/mo | 6.5 | |
| 10 | Frame0Windows · Mac · Linux | Three bars | — | 3 of 6 | $79/mo | 6.4 | |
| 11 | PenpotWeb · Self-hosted · API | Two bars | — | 1 of 6 | $7/mo | 6.4 | |
| 12 | VisilyWeb · Extension | Two bars | — | 1 of 6 | $14/mo | 6.4 | |
| 13 | MoqupsWeb · Extension | Two bars | — | 1 of 6 | $7/mo | 6.3 | |
| 14 | UizardWeb · Extension | Two bars | — | 1 of 6 | $3.25/mo | 6.3 | |
| 15 | NinjaMockWeb | Two bars | — | 1 of 6 | Free | 6.2 | |
| 16 | Quant-UXWeb · Self-hosted | Two bars | — | 1 of 6 | Free | 6.2 | |
| 17 | Figma SlidesWeb · Windows · Mac · Linux · Android · iPhone | Two bars | — | — | 6 of 6 | $3/mo | 5.9 |
| 18 | MockFlowWeb · Windows · Mac · Extension | Two bars | — | — | 3 of 6 | — | 5.4 |
| 19 | MockupTigerWeb · Windows · Mac · Linux | One bar | — | — | 4 of 6 | — | 5.4 |
| 20 | Origami StudioMac · Android · iPhone | One bar | — | — | 3 of 6 | — | 5.3 |
| 21 | Pencil ProjectWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 22 | Balsamiq WireframesWeb · Windows · Mac | Two bars | — | — | 3 of 6 | $16/mo | 5.1 |
| 23 | FlowMappWeb | No signal | — | — | 1 of 6 | — | 5.1 |
| 24 | ForeUIWindows · Mac · Linux | Two bars | — | — | 3 of 6 | €130/mo | 5.1 |
| 25 | MUIWeb | No signal | — | — | 1 of 6 | — | 5.1 |
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 UI design tool is ranked first on Freedom251?
Fluid UI is ranked #1 of 37 with a score of 6.8. 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, Lunacy has the lowest first paid tier we found: $1/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.