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Vercel AI SDK

TypeScript toolkit for building AI-powered apps

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Looking for a tool like Vercel AI SDK (TypeScript toolkit for building AI-powered apps)? Below are 5 AI tools people use as an alternative to Vercel AI SDK, ranked by leaderboard position. Each one is approved by our editors and worth comparing before you decide.

LangChain
LangChain

The most widely adopted framework for LLM applications

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OpenRouter
OpenRouter

One API endpoint for 300+ AI models from every provider

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Haystack
Haystack

Open-source Python framework for RAG and search pipelines

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LlamaIndex
LlamaIndex

Data framework for connecting LLMs to your own data

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Mastra
Mastra

Open-source TypeScript framework for AI agents

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