Best AI Widget Builders in 2025 - Embeddable vs Fullstack App Builders
Looking for the best AI widget builder in 2025? Here's the truth: there's only one platform actually built for creating custom widgets, and the rest are fullstack app builders.
Let me break down the difference and show you why it matters.
What Makes a Widget Builder Different?
Widget builders let you create standalone interactive components (calculators, forms, quizzes, booking systems) that you embed on existing websites. You're not building a whole app, just the interactive pieces.
Fullstack app builders? They create complete web applications. Different use case, different tool.
1. Embeddable
What it does: Builds custom widgets you embed anywhere.
Embeddable is purpose-built for one thing: creating smart, interactive widgets that work on any website. Describe your widget in plain English, the AI builds it, and you get an embed code that works everywhere.
Why Embeddable Wins for Widgets
Widget-First Design Every feature is designed for embedded components. The AI understands widget patterns, knows how to make things compact and focused, and generates code optimized for embedding.
Universal Embedding Works on Shopify, WordPress, Wix, Squarespace, or custom sites. One embed code, works everywhere. No platform-specific setup.
Website Design Analysis Give Embeddable your website URL and it analyzes your colors, fonts, and design system. Your widget automatically matches your site's look. No manual styling needed.
Perfect for Adding Interactivity Already have a website? Don't want to rebuild it? Just add custom widgets where you need interactivity. Keep your existing site, enhance it with smart components.
Pricing
- Free: 25 tokens/month, basic features, watermark
- Pro: $19/month for 1 seat + custom domains + no watermark + unlimited embeddables
You can also buy more tokens, storage, or submissions as you grow.
Learn how to build custom widgets with Embeddable
2. v0 by Vercel: Fullstack App Builder
What it does: Generates complete React apps and UI components.
v0 is Vercel's AI app builder focused on creating full applications with Next.js and React. It's powerful for building standalone apps but not designed for widget embedding.
The Catch
v0 generates complete applications meant to be deployed as standalone sites on Vercel. While you can technically extract components, it's not optimized for creating embeddable widgets. The output is geared toward fullstack projects, not portable components.
If you want to add a custom calculator to your existing Shopify store, v0 isn't built for that workflow.
Pricing
- Free: $5 credits/month
- Premium: $20/month with $20 credits
- Team: $30/user/month with $30 credits per user
Token-based usage on top of plans.
3. Bolt: Fullstack Development Platform
What it does: AI-powered fullstack app development.
Bolt (by StackBlitz) lets you build and deploy complete web applications using AI. It's a development environment for creating standalone projects, not embeddable components.
The Catch
Bolt is designed for developers building complete applications with their own hosting and infrastructure. The workflow assumes you're creating a standalone product, not a widget to embed on an existing site.
Want a booking widget for your Wix site? Bolt isn't the tool for that job.
Pricing
Pricing details aren't publicly listed, but Bolt positions itself as a development platform requiring technical knowledge despite AI assistance.
4. Lovable: Fullstack App Builder
What it does: Builds complete web applications with natural language.
Lovable focuses on helping teams build fullstack applications quickly. It handles backend, frontend, database, everything you need for a complete app.
The Catch
Lovable creates entire applications with their own URLs and hosting. It's not designed for creating widgets you embed on existing websites. The output is a standalone product, not a portable component.
Got a WordPress site that needs an interactive quiz? Lovable can't help you add just that quiz.
Pricing
- Pro: $25/month for unlimited users, 100 credits + 5 daily credits
- Business: $50/month with SSO and advanced features
- Enterprise: Custom pricing
5. base44: Fullstack App Platform
What it does: AI-powered app creation with integrated backend.
base44 lets you build complete applications with authentication, databases, and full backend infrastructure. It's focused on creating standalone products.
The Catch
Like the others, base44 builds complete applications, not embeddable widgets. You're creating a separate product with its own URL and hosting, not a component to enhance your existing website.
Need a mortgage calculator on your landing page? base44 will give you a whole app, not a widget.
Pricing
- Free: 25 message credits/month
- Starter: $16/month, 100 message credits
- Builder: $40/month, 250 message credits
- Pro: $80/month, 500 message credits
- Elite: $160/month, 1,200 message credits
Why the Difference Matters
Here's the real-world scenario:
You have: An existing Shopify store, WordPress blog, or custom website.
You need: A custom calculator, booking form, or interactive quiz.
With Embeddable: Build your widget in minutes, get embed code, paste it on your site. Done.
With fullstack builders: You'd build an entire app, host it separately, and try to iframe it or link to it. Complicated, slower, not what you needed.
The Hybrid Approach
Here's something cool: you can use these tools together.
Build your main app with v0, Lovable, or base44, then enhance it with custom widgets from Embeddable. Or build a landing page with Embeddable and embed multiple smart widgets on it.
The platforms solve different problems. Know which problem you're solving.
For more on widget creation, check out our guide on embeddable widgets.
When to Use Each Platform
Use Embeddable When:
- You have an existing website
- You need to add interactive elements
- You want widgets that match your design
- You need something to embed on Shopify, WordPress, Wix, etc.
- You want quick, focused components
Use Fullstack Builders When:
- You're building a complete application
- You need a standalone product with its own URL
- You need full backend infrastructure
- You're creating a SaaS product or complex platform
The Bottom Line
Embeddable is the only platform specifically built for AI-powered widget creation. v0, Bolt, Lovable, and base44 are excellent fullstack app builders, but they're solving a different problem.
If you need embeddable components for existing websites, Embeddable is your only real option. If you need a complete app, check out the fullstack builders.
Ready to Build Smart Widgets?
Most people don't need a whole new app. They need smart, interactive widgets on their existing website.
That's exactly what Embeddable does. Build custom widgets with AI, match your site's design automatically, and embed anywhere in minutes.
Want to get started? Head to Embeddable.co and build your first widget. It's free to try, and you'll have a working widget in minutes.
For more on building with AI, read our ultimate guide to no-code development.