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Chainlit
✓ verifiedFree
Open-source Python framework for building and deploying conversational AI apps and chat UIs with auth and integrations.
53K 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
Pricing
No public pricing
No public pricing
Core features
- ✦Python-based chat app framework (pip install)
- ✦Multiple deployment targets (web app, copilot, FastAPI, bots)
- ✦OAuth and simple authentication support
- ✦Custom frontend and chat components
- ✦Integrations with OpenAI, Mistral, LangGraph, LlamaIndex, HuggingFace
- ✦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
Use cases
- →Shipping a chat UI over custom Python logic
- →Embedding an AI copilot into an existing app
- →Prototyping LLM apps with popular frameworks
- →Building scalable single-page apps
- →Enterprise web application development
- →Performance-critical front ends
- →Learning modern web development
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