Alternatives to Chroma

LanceDB is an open-source multimodal lakehouse that keeps curation, features, search, and training on one Lance table.

Open-source RAG engine with built-in ETL, hybrid search and visual agent orchestration for enterprise AI agents

Open-source vector database for GenAI apps, scaling from a pip install to tens of billions of vectors

Open-source Microsoft Research RAG that builds a knowledge graph and community summaries from your documents, then queries them in four modes.

Vespa is an open-source AI search platform for hybrid vector, text, and tensor retrieval with machine-learned ranking.

Open-source vector similarity search that lives inside your existing Postgres database.

Vespa AI is an open-source AI search platform for hybrid vector, text and structured retrieval with ML ranking in one query pass.

Apache Doris is an open-source real-time SQL database for unified OLAP analytics, full-text search, and vector search.

Lance is an open lakehouse format for multimodal AI, pairing a file format, table format, and catalog spec with hybrid vector and full-text search on object

Open-source cloud-native data warehouse that runs BI analytics, vector search, full-text search and geospatial on one SQL engine

Open-source Python framework that incrementally keeps AI agent context fresh by reprocessing only changed data.

Open-source in-process vector database from Alibaba — install one Python package, query millions of vectors in seconds.

Open-source CLI that turns 18 source types into AI skills and RAG knowledge for 22 AI platforms.

Xberg is an open-source content intelligence engine that turns 107 document, web, code, image and audio formats into clean Markdown and

LitePali is a small open-source Python library for image-based document retrieval built on the ColPali architecture.

Open-source context retrieval layer that syncs your apps and databases so AI agents query live business data in natural language.

TopK is a unified retrieval engine that runs multi-vector, dense, sparse, regex, and metadata-filtered search in one query, billed per unit of usage.

Open-source wire protocol suite that standardizes LLM, vector, graph, and embedding calls so you swap providers in config, not code

Open-source command-line pipeline that extracts, chunks, and embeds PDFs for RAG, with switchable libraries via one parameter.

Fully managed vector database and knowledge platform: search, upsert, and rerank from one index and one API key.

Multimodal retrieval that indexes video, image, audio and PDF files straight from your S3, GCS or R2 bucket.

Fully managed vector database on Milvus for large-scale AI search, RAG, and recommendation workloads.

TiDB is a distributed SQL database with native vector search for AI agent memory, state, and RAG at scale.

Zilliz Cloud Serverless is a managed serverless vector database on Milvus, with auto-scaling compute and tiered storage for GenAI apps.

Neon is a serverless Postgres backend from Databricks with branching, autoscaling, auth, storage, functions, and an AI gateway.

Free MIT-licensed web admin UI for the Chroma embedding database, built with Next.js

Elasticsearch Labs: free tutorials, notebooks, and reference apps for AI search, vector search, and RAG on Elasticsearch.

Knowhere turns PDFs, Word, Excel and scans into source-linked structured JSON for AI agents to navigate and verify.

Self-hosted RAG search engine for private document search — BM25 plus hybrid retrieval across 34 file formats.

OpenCrab turns your documents into versioned ontology knowledge packs that Claude, ChatGPT, Cursor and Codex query through one MCP URL.