Wireframe it. Then watch it run.
Balsamiq's insight was right: early ideas should look rough so people critique the idea, not the pixels. Prototyper keeps the rough sketch and takes the next step in code: your agent builds the sketch as a running React screen, on the same canvas.
Last reviewed
What Balsamiq does well
Deliberate low fidelity
The sketchy look keeps feedback on structure, not colors. Genuinely smart, and still the clearest take on it.
Balsamiq AI
Generate editable wireframes and whole user flows from text, code or a screenshot, then turn the flow into a clickable prototype in about a minute.
Approachable for non-designers
PMs and founders actually use it, and its MCP server lets AI tools read and edit boards from outside the app.
Where Prototyper is different
The next step is code
Balsamiq’s next step is a clickable prototype you can download as HTML. On Prototyper the sketch becomes a React and TypeScript screen whose files live in the workspace.
Your agent builds it
Connect Claude Code, Codex, Cursor or another MCP client and it writes the screen’s code on the canvas, on the plan you already pay for. A built-in agent is there too.
Live multiplayer
Teammates and agents work the same canvas at once, with live cursors, so a wireframe review happens in front of the work. Reviewers join as free viewers.
A path to the repository
Connect GitHub to the workspace and the screens the team agreed on can be committed and opened as a pull request.
Side by side
| Prototyper | Balsamiq | |
|---|---|---|
| Fast low-fi wireframing | Yes | Yes |
| AI generation from a text description | Yes | Yes |
| Clickable prototype from wireframes | Yes | Yes |
| Output is a React and TypeScript codebase | Yes | HTML download |
| External AI agents over MCP | Write code on the canvas | Read and edit boards |
| Deliberately sketchy visual style | partial | Yes |
| Offline desktop app | No | Until 31 Dec 2026 |
Checked against Balsamiq's official pages on 6 October 2026; tell us if something is out of date.
Which one to pick
Pick Balsamiq when
- You want the clearest low-fi wireframing tool there is
- Clickable, mid-fidelity prototypes are as far as you need to go
- You want AI help that stays inside the wireframe style
- You need an offline desktop app, while it lasts
Pick Prototyper when
- You want an AI-native, free-to-start Balsamiq alternative
- The wireframe should become a React screen, not a mockup
- You want Claude Code, Codex or Cursor to do the building
- A team reviews the work live on one canvas
Low fidelity is a feature, and we kept it
Balsamiq built a whole product on one sharp observation: polish invites the wrong feedback. Show a stakeholder a pixel-perfect mock and they will debate the shade of blue; show them something that looks like a marker sketch and they will debate the idea. That observation stays true, and Prototyper respects it. Boxes, stickies, arrows and freehand drawing are first-class on the canvas, and nothing forces fidelity on you before you ask for it.
The difference is what the rough sketch leads to. On Prototyper it sits on the same surface where the working screen will appear, so the sketch and the build stay side by side.
Two kinds of AI-native
Balsamiq is no longer a hand-only tool. Balsamiq AI generates editable wireframes and multi-screen flows from text, pasted code or screenshots, and since March 2026 it turns wireframes into clickable prototypes. Its MCP server lets Claude, ChatGPT, Cursor and other clients read and edit boards. Credit where it is due: that is a thoughtful way to add AI without losing the low-fi discipline.
Prototyper’s AI works one layer down. The agent, built in or your own Claude Code, Codex or Cursor, does not draw wireframe elements; it writes React and TypeScript files and runs them on the canvas. The rough sketch is the brief, and the answer is a screen made of code.
What user testing can measure
A clickable prototype is good for testing navigation, labels and the shape of a flow, and Balsamiq’s generated prototypes do that well. The questions it leaves open are the ones that need real code behind the screen: how a form behaves with real input, what a validation error feels like, how an empty state reads.
A Prototyper screen is code, so those behaviors can be built and tried. The agent writes the validation, the state and the edge cases, and testers use the screen rather than a stand-in for it.
One idea, three takes
When an agent does the building, alternatives are cheap. Ask for the settings page three ways, dense, guided and minimal, and compare the running versions side by side on the canvas before anyone gets attached. Stakeholders pick between real options instead of amending the only one on the table.
Moving over, or running both
If Balsamiq is your private scratchpad, keep it; a fast, rough thinking tool never hurt anyone. The move that pays off is bringing the wireframes you intend to advance, the ones that will face users or an engineering estimate.
There is no import, and you do not need one: redraw the layout in rough boxes or drop a screenshot of the old wireframe onto the canvas, select it, and the agent rebuilds it as a running screen. A sentence can often stand in for half the boxes.
Teams that run both settle on a simple rule: Balsamiq for private thinking, Prototyper for anything that should run. The sketches stay next to the screens they became.
Frequently asked questions
- Is there a free Balsamiq alternative with AI?
- Prototyper has a free plan. You can sketch on the canvas and have an agent build the wireframe as a running screen, with the built-in agent or your own Claude Code, Codex or Cursor.
- Doesn’t Balsamiq have AI now?
- Yes. Balsamiq AI generates editable wireframes and flows from text, code or screenshots, and turns them into clickable prototypes. Prototyper’s agent writes React code instead, so the result is a running screen rather than a wireframe.
- Can I keep things low-fi?
- Yes. The canvas defaults to plain boxes, notes, arrows and drawing, and nothing forces fidelity until you ask for it.
- Does it have Balsamiq's sketchy visual style?
- Not as a skin. Rough here is a workflow rather than a look: screens stay structural for as long as the conversation needs them, then get built when you ask.
- Can I import Balsamiq files?
- No. Drop a screenshot of the wireframe onto the canvas or redraw it roughly, and the agent rebuilds it as a running screen.
- What happens to the wireframe when the real screen exists?
- It stays on the canvas next to the working version, as the record of the idea, so reviews can see what was asked and what was built.
Sources
- Balsamiq: Wireframing with Balsamiq AI, accessed
- Balsamiq: Prototypes, accessed
- Balsamiq blog: Introducing prototyping in Balsamiq, accessed
- Balsamiq: MCP server, accessed
- Balsamiq: Balsamiq for Desktop, accessed
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