“### 1. Figma AI Agent — Best overall for existing UI designs”
“On-canvas editing: Excellent”
“Style consistency: Excellent, when connected to a design library”
“It can reference your actual components, variables, styles and libraries rather than merely trying to imitate a screenshot.”
“Style adherence: 9/10”
“The main caveat: you need a reasonably well-organized component library and clear design-system references.”
“Complex layouts still need human review.”
“### 2. Framer AI — Best for website design and visual iteration”
“On-canvas editing: Excellent”
“Style consistency: Very good”
“Style adherence: 8.5/10”
“One particularly useful aspect is that the AI can reuse existing Framer styles and components.”
“Different AI models can produce noticeably different visual results, so you should review the output.”
“### 3. Webflow AI Assistant — Best for existing website styles”
“On-canvas editing: Very good”
“Style consistency: Very good”
“Style adherence: 8/10”
“Its biggest advantage is that it understands the existing website's styling context.”
“However, there's an important limitation: it can reuse existing classes and create new ones, but it cannot update your existing classes through the page-design assistant.”
“Also, the page-design feature is in public beta and has rollout restrictions.”
“Great for extending an established website, but less suitable if you want AI to freely modify an entire existing UI design system.”
“### 5. Uizard — Best for quick mockups and theme exploration”
“On-canvas editing: Good”
“Style consistency: Moderate to good”
“Style adherence: 7/10”
“Its Theme Generator is especially useful: you can generate a theme using a text description, preview it and apply it across an existing project.”
“It's useful for early-stage prototyping and exploring visual directions. However, it's not my first choice for sophisticated design-system-aware editing.”
“### 4. Google Stitch — Best for AI-first UI exploration”
“On-canvas editing: Very good”
“Style consistency: Good”
“Style adherence: 7.5/10”
“One particularly interesting feature is DESIGN.md, which allows design rules to be imported and exported between design and coding tools.”
“Promising for rapid UI exploration. However, I'd put it behind Figma for teams that need reliable reuse of an established, detailed component library.”