I'm building my own AI agent

1. Agent-Native

   Agent Frameworksfree

   Builder.io's open-source TypeScript framework for agentic apps where agent and UI share actions, data and state.

   Best for: Building agentic apps with a real UI

2. Vercel AI SDK

   Agent Frameworksfree

   TypeScript toolkit for building AI apps and agents across model providers.

   Best for: AI features in Next.js/React apps

3. Mastra

   Agent Frameworksfree

   TypeScript framework for AI agents, workflows and RAG.

   Best for: JS/TS developers building agents

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