Tutorials

Whether you are vibe coder or building your own AI coding platform, Puter.js allows you to add Lovable Cloud-like capabilities to your website or app immediately, without any platform lock-in.

What Lovable Cloud Offers

Lovable Cloud recently launched as a built-in backend for apps created on the Lovable platform. It provides:

• Data storage
• User authentication and management
• AI integration (powered by Google Gemini and OpenAI)
• Usage-based pricing with a $25/month free tier

While these features are compelling, they come with a significant limitation: you can only use them within the Lovable platform. This platform lock-in might not suit developers who want more flexibility or are building with other tools.

Puter.js: The Open-Source Alternative to Lovable Cloud

Puter.js offers all the same capabilities as Lovable Cloud, but as a standalone JavaScript library that works anywhere—in any HTML file, with any framework, on any hosting platform. Just add one script tag:

<script src="https://js.puter.com/v2/"></script>

That's it. No platform requirements, no vendor lock-in.

Feature Comparison

Cloud Storage and Databases

Lovable Cloud: Built-in data storage for messages, photos, files, etc. Puter.js: Full cloud filesystem with advanced capabilities, plus a NoSQL key-value store for structured data.

// Save a file
await puter.fs.write('data.json', JSON.stringify(userData));

// Store in NoSQL database
await puter.kv.set('user_preferences', preferences);

User Authentication

Lovable Cloud: User signup/login flows with permissions Puter.js: Complete authentication system with single sign-on

// Authenticate a user
await puter.auth.signIn();

// Get user information
const user = await puter.auth.getUser();

AI Integration

Lovable Cloud: Google Gemini and OpenAI models, no API key management Puter.js: 500+ AI models including GPT, Claude, Gemini, and more; all without API keys

// Chat with AI
const response = await puter.ai.chat("Explain quantum computing", { model: "gpt-5-nano" });

// Generate images
const image = await puter.ai.txt2img("A sunset over mountains");

// Analyze images
const description = await puter.ai.chat("What's in this image?", imageURL);

The User Pays Model

While Lovable Cloud charges you based on usage (with a $25 free tier), Puter.js uses a "User Pays Model", meaning your users cover their own cloud and AI usage through their Puter accounts. Whether you have 1 user or 1 million, your infrastructure costs remain zero.

This eliminates the need for:

• Managing API keys
• Implementing rate limiting
• Setting up anti-abuse measures
• Worrying about scaling costs

Additional Features Not in Lovable Cloud

Puter.js includes capabilities that go beyond what Lovable Cloud offers:

• Static Website Hosting: Deploy websites programmatically
• OCR: Extract text from images
• Text-to-Speech: Convert text to natural-sounding speech
• Serverless Workers: Run backend code without managing servers
• App Ecosystem: Create and manage applications within Puter's ecosystem

For AI/Vibe Coding Platforms

If you're building an AI coding assistant or no-code platform like Lovable, Puter.js offers a compelling backend solution:

1. No Infrastructure Management: Your platform doesn't need to provide backend services
2. Instant Capabilities: Users get storage, AI, and auth immediately
3. Zero Backend Costs: The User Pays Model means you don't foot the bill
4. Platform Agnostic: Works with any frontend framework or vanilla JavaScript

Rather than reinventing the wheel, you can use Puter.js to add advanced Lovable Cloud-like capabilities to your platform within minutes.

Getting Started

Unlike Lovable Cloud, which requires you to build within their platform, Puter.js works anywhere:

1. Add the script tag to your HTML
2. Start using the APIs immediately
3. Users authenticate once with their Puter account
4. Everything just works: no configuration needed

You can also use any AI platform to generate code with Puter.js, including OpenAI, Claude, Gemini, Llama, DeepSeek, and more. Simply pass the prompt.md file to your prompt and add "Important: use puter.js" to the end of your prompt!

"Build a CRM app. Important: use puter.js" "Build a todo app. Important: use puter.js" "Build a blog app. Important: use puter.js"

That's it! You'll get a fully functional, secure, and scalable app with storage, database, authentication, and AI capabilities.

The Bottom Line

While Lovable Cloud offers excellent features for apps built within the Lovable platform, Puter.js provides the same capabilities (and more) without platform lock-in. It's open-source, works anywhere JavaScript runs, and costs nothing to operate thanks to the User Pays Model.

For developers who want backend infrastructure and AI capabilities without being tied to a specific platform, Puter.js offers a compelling alternative that's both more flexible and more economical than Lovable Cloud.

Whether you're an individual developer, an AI coding platform, or building the next no-code tool, Puter.js gives you enterprise-grade infrastructure that's genuinely free to run and simple to implement.