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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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✓ verifiedFreemium

Open-source AI coding assistant offering autocomplete and chat in IDEs; the company was acquired by Cursor.

775K visits/mo
Notebooks.app logo
Notebooks.app
✓ verifiedFree trial

An AI whiteboard for content creators that pulls in your channels and research to find ideas, write scripts and draft posts in your voice.

3.1K saves
Angular.dev logo
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
Castly logo
Castly
✓ verifiedFreemium

AI writing assistant that turns chat conversations and uploaded PDFs into polished, publishable content for creators.

3.4K visits/mo
Pricing

No public pricing

No public pricing

Free trial available

No public pricing

No public pricing

Free: $0 (5 PDF uploads, 5 published posts)
Pro: $12/mo (unlimited conversations, uploads, posts)
Core features
  • Open-source AI code assistant
  • Customizable autocomplete
  • In-editor AI chat
  • Community-built coding agent
  • AI whiteboard workspace for content
  • Connects YouTube, Instagram, competitors and research
  • AI idea discovery from your channels
  • AI script and post generation in your voice
  • Consolidates multiple content tools
  • 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
  • Design canvas integrated directly into the IDE (VSCode/Cursor)
  • Agent-driven MCP canvas based on open design format
  • AI Multiplayer for generating screens and flows in parallel
  • Design as Code: Design files live in repo, versioned with Git
  • Pixel-perfect vector-to-code workflow
  • Conversational AI content generation
  • Question-answering over uploaded PDFs
  • Rich text editor for refining drafts
  • One-click publishing and sharing
  • Unlimited conversations on all plans
Use cases
  • Get AI code completions while coding
  • Ask questions about code in the editor
  • Build on an open-source coding-agent foundation
  • Finding content ideas that perform
  • Writing video scripts faster
  • Drafting social posts in a consistent voice
  • Building scalable single-page apps
  • Enterprise web application development
  • Performance-critical front ends
  • Learning modern web development
  • Designing new products and features with pixel-perfect precision without leaving the development environment.
  • Eliminating design handoffs by having design and code live under one roof.
  • Accelerating workflow by using AI multiplayer to generate UI components and flows.
  • Shipping production-ready apps with guaranteed code-design alignment.
  • Integrating existing design systems directly from the codebase.
  • Drafting blog posts and articles
  • Extracting insights from documents
  • Refining and polishing AI drafts
  • Publishing content quickly
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