20.7k
Pgvector
Open-source vector similarity search extension for PostgreSQL, enabling efficient and accurate vector-based data retrieval.
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2 Open Source Alternatives to Chroma
There are 2 open-source alternatives to Chroma in this directory. The most popular is Pgvector with 20.7k GitHub stars, followed by Weaviate(16.0k stars). All are open source, free to use, and many can be self-hosted.
Quick comparison
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | Pgvector Open-source vector similarity search extension for PostgreSQL, enabling efficient and accurate vector-based data retrieval. | 20.7k | C | Other |
| 2 | Weaviate Weaviate is an open-source vector database designed to store and manage both objects and vectors, enabling combined vector search with structured filtering. It offers fault tolerance, scalability, and is built as a cloud-native, developer-friendly solution for semantic search and AI-powered applications. | 16.0k | Go | BSD 3-Clause "New" or "Revised" License |
All open-source alternatives to Chroma
Frequently asked questions
What are the best open-source alternatives to Chroma?
The top three are Pgvector(20.7k stars), Weaviate(16.0k stars). All are open source and free to use.
Are these alternatives to Chroma free?
Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to Chroma?
Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.
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