<ul><li>Top 22 tools and open source frameworks for building AI apps have been introduced in this article.</li><li>An AI uses LLM to communicate with the outside world and obtain data.</li><li>AI agents can be reactive or proactive and can plan, make decisions and even get better over time.</li><li>Copilotkit provides an easy way to build in-app AI chatbots and AI agents.</li><li>LangChain is a popular LLM framework used by over 160k developers.</li><li>Aider helps code with voice and edit multiple files at once for complex requests.</li><li>Bolt, AgentOps, LangGraph and CrewAI are some of the popular frameworks for building AI applications.</li><li>Better Auth can be used for a simple yet proper authentication system for AI apps.</li><li>AutoGPT allows the creation and management of continuous AI agents.</li><li>Tavily and TanStack Query are useful for fetching and managing large datasets.</li><li>Rasa provides tools for building contextual assistants and chatbots for various platforms.</li><li>Visual Copilot is a Figma plugin that turns designs into clean, ready-to-use code.</li><li>Cursor is an AI code editor that understands and improves your coding style.</li></ul>

The tech stack for building AI apps in 2025

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