My 9 Best AI Prototyping Tools in 2026

Prototyping tools help you create designs you can share with developers, review with stakeholders, and refine before launch.

The problem is finding an option that has everything you need. There are hundreds of tools out there, and that’s before you factor in AI-powered options alongside traditional sorts. Filtering through all of them to find an option with all the features that matter to UI/UX designers gets overwhelming fast.

I’ve been there. So I spent a few weeks testing, comparing, and iterating on real app prototypes across a range of platforms.

Here are the 9 best prototyping tools I narrowed down to.

Best AI prototyping tools for UI

Here are my top AI prototyping tool picks, organized by user type and use case:

• Best overall: UX Pilot

• Best for AI website sitemaps and wireframing: Relume

• Best for early-stage design validation: Google Stitch

• Best for website design: Framer AI

• Best for speeding up interaction setup: Figma AI

• Best if you already have an existing product design: Alloy

These picks aren’t based on marketing pages or feature checklists. I spent a few weeks actually using these tools to prototype the same product ideas, breaking things, iterating on flows, and seeing which ones did the best.

I also sanity-checked my takes with designers and product folks I work with. These are the kind of people who are quick to call out tools that look impressive in demos but quietly fall apart in real workflows.

Essentially, everything that ended up making the list has been filtered exhaustively. 

1. UX Pilot AI UI Generator

UX Pilot is a prototyping tool built around a generative, chat-based workflow. You describe what you want, and it generates app interfaces based on your requirements, which saves you from having to go through a steep learning curve.

But it doesn’t box in experienced designers who already have established design practices and a stringent criterion when creating prototypes, either. UX Pilot lets you import your existing design system and export prototypes back into your workflow with its Figma integration.

UX Pilot is best for AI-powered prototyping with existing design systems

To get started with your prototype, describe what you’re looking for, whether you want a mobile or web app, then click Generate. If you have a specific design inspiration image or a doc covering guidelines, you can always attach it as a reference.

Here is an example of a screen I generated for a travel planning app.

You’ll notice it followed a consistent color scheme, covered all of the essentials a user is likely to be most interested in on the dashboard, and organized the various tabs into a clear information hierarchy. All of that with a prompt that was less than 50 words long. 

Once you have a first draft of your screen, you can switch to the Chat tab and prompt UX Pilot to make any changes. When you have something you like, you can use the Create Flow option to generate other screens for your app, following the design philosophy you’ve established. 

To test how a prototype behaves, select any generated screen and click the Interact button. This lets you click through buttons, test user flows, and see how the app actually performs.

But that's not the only way to customize your output. You can also fine-tune the design by creating custom themes, complete with your own primary and secondary colors — either directly inside UX Pilot or by uploading a JSON file.

There’s the option to import an unlimited number of components or icons directly from your Figma account using the plugin too. These can be grouped into Collections (which are essentially folders) for each project, so everything stays organized.

And of course, you can always export your design to Figma as well, so it fits neatly into your existing product development process. All in all, that's a lot of leeway in how you can customize your designs — not many other prototyping apps currently offer that level of flexibility, and it's been a big pain point for users.

UX Pilot offers a free plan, so you can always try it out to see if it meets your needs without first making an investment. Once you do decide to upgrade, you can choose from one of the three paid plans.

2. Relume AI 

Relume is an AI website planning and prototyping tool that focuses on helping create the bones of your app: sitemaps, wireframes, and style guides.

The idea is that Relume acts as a design guide, giving you a solid starting point to refine before moving on to the final design.

Relume is best for AI website sitemaps and wireframing

You start by describing the website you want to build, and Relume generates a complete sitemap along with low-fidelity wireframes for each page. These wireframes focus on layout and content hierarchy. This is where you’ll want to make any necessary changes to the initial design. 

You can switch between tabs in the top bar to access the sitemap, wireframes, style guide, and full design. Use the Style Guide tab to adjust colors, typography, and overall styling, then move to the Design tab to see the final version take shape.

I used the same example here for a travel planning app. My simplest take on what it generated would be, it's okayish. Nothing that blows you away, it has a template-like feel, and you don't get high-fidelity prototypes, but Relume’s output generally does what you ask of it.

The value is in their pre-made component library and the sitemap feature, which gives you a tad bit more control in the early stages of development than most other tools.

The plus side is that Relume comes with a free plan, albeit limited in scope in terms of how many pages you can generate and export to Figma. If you decide to upgrade, you can choose from three paid plans.

3. Google Stitch

Google Stitch is an experimental AI tool from Google Labs that turns text prompts or rough sketches into working UI designs and front-end code. It’s traditionally only been able to generate static UI designs, but has recently expanded to offer prototyping as a feature as well.

Google Stitch does for early-stage design validation

Stitch has a familiar interface, with a minimal layout that includes a simple text box, a toggle for mobile or web apps, a dropdown to select a mode, and the option to upload reference material. 

It has four different modes, each based on a different Gemini model: Gemini Flash, 2.5 Pro, 3 Pro, and Nanobanana for redesigns. It's frankly more confusing than it needs to be. I’d recommend Gemini 3 Pro for the best results, but if speed matters to you more, Flash is the better option. 

You do also have the option to toggle between apps for desktop and mobile devices. I gave it my usual test: asked it to design a travel app based on a short description and then stepped back to see how well it filled in the blanks. 

It did a decent job overall. Stitch expanded on my prompt, checked in to make sure everything aligned with what I wanted, and only then moved on to the design. The resulting UI met the core requirements. The output is static by default. To turn it into a prototype, you need to select all of your screens and click the Prototype button that appears.

It’s a fairly slow process. Stitch took roughly five minutes to generate a prototype for the five screens of my app. But the final version does what's asked. It's a complex prototype where you can interact with the app, click through the screens, and see hover states and small interaction details added where they make sense. 

The downside is the back-and-forth required to make sure every screen is accounted for. In my case, Stitch missed the side menu entirely, which left the prototype with a button that looked functional but did nothing when clicked.

It’s also worth noting that while you can export the design as a zip file or get the code, not all of Stitch’s modes support exporting to Figma.  You also miss out on component imports from Figma entirely, which you get with tools like UX Pilot. If you already have an established design workflow that you’re hoping to build upon, Stitch might not be the ideal choice.

Google Stitch is free to use, but it does come with a limit of 350 generations per month with the Flash mode, with no options to upgrade as of now.

4. Framer AI

Framer AI is a website builder rather than just a prototyping tool. While the other tools we’ve covered focus on helping you explore structure, flows, and early concepts, Framer is built to take things much further. 

While you do have the option to create Wireframes and early-stage designs, Framer also handles hosting and lets you publish your site directly from the platform. Keep in mind it's geared toward general-use websites. If you’re building a SaaS product or a mobile app, it won’t be much help.

Framer AI is best for website design

Framer works best if you have some level of technical know-how. You can start from a template or a blank canvas, and begin a new design either manually or with its AI tool. 

Unlike the other platforms I’ve covered, where AI is the primary way to prototype, Framer treats it as a supporting feature. It’s there to help you along, but it isn’t supposed to be the main way you edit designs and lacks many of the advanced features you'll find in some other tools.

There are two AI “modes”: 

1. Wireframer, which lets you create simple wireframes, 

2. and Workshop, which allows you to add interactive components to your site 

I couldn’t use the same travel app idea to test it, since it doesn't do SaaS well, so I went with a generic prompt to create a landing page for a productivity app instead. 

The resulting design is sparse, which is expected since this is only a wireframe, but you can’t add much once you use the Workflow AI, either before having to resort to manual edits.

Framer AI offers a free trial so you can give the platform a go, after which you can sign up for $15 per month for their Basic plan.

5. Adobe Firefly

Adobe Firefly is Adobe’s generative AI platform. It’s closer to an image and video generator than a prototyping tool, and the focus isn’t on UX. But it can still be useful for early creative exploration. 

If you’re looking to generate visual ideas or want something to use alongside your core design tools (like dropping generated images into UX Pilot for inspiration), Firefly fits nicely into that role.

Adobe Firefly can help with creating supporting elements for UI

Firefly lets you generate UI-style visuals from text prompts. You can choose from one of the four AI models: 

• Gemini Nano Banana

• Firefly Image 5

• GPT Image

• Flux Knotext Max

Where Firefly does well is in creating supporting elements. You can use it to generate moodboard elements, icons, backgrounds, illustrations, hero elements, etc. It’s nice if you’re working with a blank slate and need something to feed your creative side.

Since it’s not built for full UI design, I decided to have it generate a few icons for my travel app instead. It delivered as requested, though the style felt a bit stuck in 2010–Facebook territory. But that's something you can quickly rectify with a follow-up prompt.

Keep in mind there’s no way to define screens, connect flows, or create interactions. Everything it generates is static. You can’t click through a design, test user journeys, or validate usability without exporting visuals into another tool.

It also doesn’t work with design systems in any meaningful way. You can’t import components, reuse patterns across screens, or enforce consistency beyond what you describe in a prompt. The plus side is that it syncs with any other internal tools of Adobe that you might be using, like Photoshop, Illustrator, and Express.

Adobe Firefly comes with a free trial, after which you can upgrade to one of the paid versions, starting at $9.99 per month for the Firefly Standard plan.

6. Figma AI

Figma is already where most designers build and test prototypes, so Figma AI doesn’t try to replace that workflow. Instead, it adds automation on top of an already solid prototyping system. Think of it less as an AI prototyping tool and more as a way to move faster once you’re already inside Figma.

Figma AI is best for speeding up interaction setup 

I also found First Draft most like what we’ve been covering with other tools. Once you have a design open (even if only a blank canvas), you can go to the toolbar and select First Draft. To use it, describe a screen, and Figma generates a high-fidelity layout. 

The limitation is that it focuses on individual screens rather than full flows. It also only generates hi-fi designs, and you won’t have much luck with getting simple wireframes.

The most useful AI feature for prototyping is Add interactions. You select a group of screens you want to connect, and Figma automatically links them into a basic navigation flow. From there, you can review each generated flow individually and decide whether to keep it or remove it.

Prototyping in Figma also has the advantage of keeping everything in one platform, making it much easier to share designs with the dev team, conduct user testing, and gather customer feedback without much friction.

Figma offers a free Starter plan, but its AI features are only available on paid tiers, which start at $16 per month for the Full Seat version of the Professional plan.

7. Alloy App

Alloy is an AI-assisted prototyping platform that lets product teams build high-fidelity, interactive prototypes directly from an existing web product. Instead of starting from blank screens or wireframes, you capture live pages and then describe changes or new features you want to add to the tool. 

Alloy is best if you already have an existing product design

Alloy works a bit differently from most of the tools on this list. It’s primarily a browser extension. You use it to capture an existing page on your site (or a locally hosted design), and Alloy pulls that page into its AI assistant. From there, you can chat with the AI to make changes directly to the design.

I tested it on the Userpilot homepage. Alloy captured the page as is, a process that took about a minute, though this really depends on how long the page is and how many elements it includes. Another capture took over five minutes. Once in the chatbot, I prompted the tool to add a section below the hero, with specific instructions on what it should include.

It did a solid job of matching Userpilot’s existing layout, color scheme, and overall style, and added a clean CTA to tie everything together.

The caveat here is that you need something to start off with. If you’re looking to prototype from scratch, Alloy won’t be much help. 

Its customization options are fairly limited. While it does a decent job of generating new sections based on the captured design, it doesn’t always get everything right. You also don’t have the option to import existing components from Figma, which can be a drawback if you rely on a structured design system.

Alloy has a Free plan that allows up to 20 prototypes. If you decide to upgrade, the Pro plan starts at $20 per month.

8. Canva 

Canva has traditionally been a graphic design platform, but it has recently introduced features that let designers create linked screens and simple interactive flows. 

You can build layouts using its extensive UI component library, then add clickable links or hotspots to simulate navigation between pages, effectively producing basic clickable prototypes.

Canva is great if you want access to a comprehensive list of templates

You can create multiple screens and add elements, buttons, and other UI components between them. For early concepts or stakeholder walkthroughs, this works well, especially if your audience isn’t familiar with design tools like Figma.

The trade-off is depth. Canva doesn’t support clickable buttons, the ability to test user flows between screens, and many of the other features you’ll find in dedicated prototyping tools. 

But if you’re a beginner and want to work with a platform that has lots of available templates, Canva is great. 

Canva offers a generous free plan, with paid plans unlocking more templates and assets. It’s useful for fast mockups, but not a replacement for purpose-built prototyping tools.

9. Lovable

Lovable comes with a simple interface design and is among the most popular AI coding tools. It’s not a prototyping tool, but a full-stack app builder that happens to be useful early in the product design process, especially when you want to move beyond clickable mockups.

Lovable is best for quickly turning ideas into functional apps

Lovable can write code and generate a working app from a text prompt. That includes UI, navigation, basic business logic, and a backend.

I tested it using the same travel planning app idea you might remember from the previous tools. Lovable produced a functional multi-page app that had all of my desired features added. You could add trips, save information, and move through flows. 

This comes with its set of trade-offs. You don’t get granular design control since visual tweaks are made through prompts rather than direct manipulation, which makes it harder to execute precise layouts and spacing rules. And getting to a final production app will require you to have some level of coding knowledge overall.

Lovable also doesn’t slot neatly into a typical design-to-dev workflow. There’s no real concept of exporting designs. But you do have the option to import your design components from Figma with their plugin, which is a plus. All in all, it's not really a replacement for prototyping tools, but it can be great to give you an idea of what the final app would look like.

Lovable works on a freemium model, with a free plan that gives you 5 credits daily, and up to 30 a month. Its paid Pro plan starts at $25 per month.

Still not sure which AI prototyping tool to choose?

If you’re on the fence, start by thinking about how you actually work and what you're trying to accomplish. Here's where to start depending on your situation:

• If your goal is to explore ideas, map out flows, and iterate on UI quickly, UX Pilot will feel the most immediately useful. Its Figma integration makes it easy to fold into an existing design workflow. It’s flexible, fast, and among the more advanced tools overall.

• If you want a simple site structure and some basic wireframes that you can build upon, Relume is great at that. 

• If your goal is to design and publish a website from the same platform, Framer AI is more appropriate than most of the other tools here.

Most of these platforms offer free plans or trials, so it’s worth testing a couple of different platforms in parallel to find the right prototyping tool.