PageIndex alternatives
Curated alternatives to PageIndex — and why you'd switch.
supavec
Open-source RAG-as-a-service (the Carbon.ai alternative): upload any data source, get vector search and a chat API in minutes — Supabase-based, multi-tenant with RLS, streaming responses.
Why switchBoth answer questions over your documents; supavec is vector-DB RAG-as-a-service (embed + similarity search), PageIndex is vectorless — a reasoning tree index with no chunking or embeddings.
Full comparison →LlamaIndex
Data framework for connecting custom data sources to LLMs — ingestion, indexing, retrieval.
Why switchBoth index documents for LLM retrieval; llamaindex is the general vector/index data framework, PageIndex is a reasoning-tree approach purpose-built for long documents.
Full comparison →Chroma
Open-source embedding database for building AI apps with retrieval.
Why switchPageIndex is explicitly 'no vector DB' — it replaces embedding-similarity retrieval (chroma's job) with LLM reasoning over a document tree.
Full comparison →