LightRAG vs turbopuffer vs Zep
Side by side, from each listing’s own data. A row where every column says the same is shown once, dimmed.
 LightRAGby HKU Data Science LabRemove LightRAG from this comparison |  turbopufferby turbopufferRemove turbopuffer from this comparison |  Zepby ZepRemove Zep from this comparison | |
|---|---|---|---|
| Sets it apart |
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| What it is | Builds a graph-based retrieval index over documents so agents can answer questions spanning many sources, served through a standalone API server. | Gives search and RAG backends a serverless vector and BM25 full-text search database built on object storage, queried over an HTTP API or official SDKs. | Long-term memory store for AI assistants. Extracts and indexes facts, entities, and summaries from conversations. Fast hybrid search combines semantic and full-text retrieval. |
| Provider | HKU Data Science Lab | turbopuffer | Zep |
| Official vendor | Not an official listingSame for all | ||
| Verified | YesSame for all | ||
| Access | API, CLI | API | API |
| Auth | None | API Key | API Key |
| CLI install | In its docs | No CLI | No CLI |
| API base URL | In its docsSame for all | ||
| Skills | Graph Index, Hybrid Query, Incremental Update, API Serving | Vector Search, BM25 Full-Text Search, Hybrid Search, Namespace Branching | Auto-extract facts, entities, and summaries from raw conversation transcripts, Track entity relationships and state changes across long multi-session interactions, Temporal memory management that weights recency and relevance for retrieval, Hybrid search combining dense semantic vectors and full-text BM25 scoring, Retrieve cross-session context in a single API call for any user or thread |
| Streaming | NoSame for all | ||
| Push notifications | NoSame for all | ||
| Categories | Memory & State, Research & Knowledge, Vector Databases | Vector Databases, Infrastructure & Ops | Memory & State |
| Tags | graph-rag, retrieval, knowledge-graph, embeddings, document-indexing, question-answering, memory-backend | vector-search, full-text-search, bm25, hybrid-search, object-storage, serverless, turbopuffer | memory, long-term-memory, llm, conversation-history, knowledge-graph |
| Listed since | Sep 18, 2026 | Oct 4, 2026 | Apr 8, 2026 |
| Use it now | |||
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