Pick Builderii if…
- You want to move from low-fi to high-fi without redrawing
- You want AI to draft screens
- You want a real prototype and user tests
- Your flows and screens belong on one board
Balsamiq alternative
Sketchy when you want it. Polished when you need it.
Builderii’s wireframe kit has a deliberately rough low-fidelity look for early ideas. When it’s time to show it, one switch turns every screen into a polished, on-brand design, and Play turns it into a prototype.
Works in your browser · No card · Free while it’s new
Why teams pick Builderii
Every fidelity, one set of screens.
46 components
Basics, inputs, navigation, content, overlays and website sections, each with props you can edit.
One fidelity switch
⇧W flips between low-fi and high-fi. Rendered redraws the screens as final designs with real photos.
AI screens
Describe an app and get linked screens, or turn a screenshot or a sketch into an editable wireframe.
Real prototypes
Click and hover links, transitions and a full-screen player in a device frame.
Every device
iPhone, Android, iPad, web, desktop and watch frames, and one-click versions for another device.
Accessibility check
Contrast, tap targets, labels and more, pinned on the screens, most with a one-click fix.
Side by side
Builderii and Balsamiq, side by side.
| Feature | Builderii | Balsamiq |
|---|---|---|
| Low-fidelity wireframes | 46 components in a rough, Balsamiq-style low-fi look | Yes, its signature sketchy style |
| High fidelity in your brand | One switch, your brand read from your website, any Google font | Low fidelity by design |
| Clickable prototypes | Transitions, hover triggers, a player, and test links with heatmaps | Linked wireframes you can click through |
| Flowcharts and mind maps on the same board | Yes | Not its focus |
| Price to start | Free, with every feature | Paid plans with a free trial |
Compared from each product’s public pages in October 2026; features change, so check before you decide. Figma, FigJam, Whimsical, Miro, Lucidchart and Balsamiq are trademarks of their owners. Builderii isn’t affiliated with or endorsed by them.
Which to pick
Which one fits your team?
Pick Balsamiq if…
- You want low fidelity only, on purpose
- You like its hand-drawn style and simple controls
- You don’t need prototypes beyond clicking through
Questions
Good questions.
Is Builderii a free Balsamiq alternative?
Yes. Builderii is free while it’s new, with every feature on and 500 AI jobs a month per person. Viewers and commenters will always be free, and paid plans will publish their AI allowances.
Does Builderii have a low-fidelity style?
Yes. Low-fi is Builderii’s default wireframe look, with a hand-drawn option for shapes and stickies too. High-fi and Rendered are a switch away when you need them.
Can I turn a sketch into a wireframe?
Yes. Draw it with the marker, select it and choose Sketch → wireframe in the AI bar, or give the AI bar’s image button a photo of a paper sketch.
Can I test my wireframes with users?
Yes. Link the screens, then share a test link: Builderii records taps and paths and shows heatmaps and drop-off on your board.
Keep reading
More ways to use Builderii.
What do you want to build?
Start with a prompt, a template or a blank board. It’s free.