Best LlamaIndex alternatives

Open-source LangChain framework for building LLM applications with chains, agents, and memory management. Simplifies integration of language models into production workflows.

Open source vector database for semantic search and AI applications. Weaviate enables teams to build scalable vector search at scale with native support for generative AI integrations.

Global CDN and developer platform offering edge computing, DDoS protection, and serverless functions via Workers. Used by ops teams to accelerate content delivery and secure applications.

OpenRouter is a unified API gateway that routes requests across multiple LLM providers, enabling developers to optimize for cost, latency, and model capability without vendor lock-in.

Pinecone is a managed vector database purpose-built for AI applications. It enables fast semantic search and RAG at scale without infrastructure overhead.

European LLM provider offering open and commercial Mistral AI models, plus Le Chat conversational interface. Designed for operators needing cost-effective, privacy-conscious alternatives to US-based models.

Together AI provides serverless LLM inference for open models and custom fine-tuned variants, enabling builders to ship AI features without managing infrastructure.