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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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DHTMLX Chatbot
✓ verifiedFree
Lightweight MIT-licensed JavaScript chatbot UI widget for building support-agent chat interfaces on top of any LLM.
92K visits/mo
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Angular.dev
✓ verifiedFree
Google's open-source TypeScript framework for building scalable web apps, featuring signals, reactivity and first-party tooling.
1.1M visits/mo
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OnSpace.AI
✓ verifiedFreemium
No-code AI builder that turns prompts into full-stack iOS, Android and web apps with a managed backend and Stripe payments.
394K visits/mo54K saves
Pricing
No public pricing
No public pricing
Free: $0 (500 daily / 2,000 monthly credits)
Pro: $25/mo (up to 7,500 credits/mo)
Core features
- ✦MIT-licensed and free to use
- ✦Lightweight (~65kb) JavaScript widget
- ✦4 message display modes plus typewriter effect
- ✦Markdown support and chat history
- ✦Backend hook to integrate any LLM
- ✦Responsive, mobile-friendly, read-only mode
- ✦Signals-based fine-grained reactivity
- ✦Built-in control flow and deferrable views
- ✦Server-side rendering and hydration
- ✦First-party routing, forms and dependency injection
- ✦AI-forward tooling and MCP resources
- ✦In-browser tutorials and playground
- ✦AI app builder for iOS, Android and web
- ✦Managed backend via Supabase (DB, auth, storage)
- ✦Built-in Stripe payment integration
- ✦Agent mode with usage-based pricing
- ✦Mobile creator app for building on the go
- ✦GitHub export and code editor
Use cases
- →Adding an AI chat UI to web apps
- →Building LLM-powered support agents
- →Embedding chat widgets in existing products
- →Prototyping chatbot interfaces
- →Building scalable single-page apps
- →Enterprise web application development
- →Performance-critical front ends
- →Learning modern web development
- →Building an MVP without coding
- →Launching mobile apps quickly
- →Prototyping app ideas
- →Adding payments to a no-code app
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