Top 5 semantic-search-engine Open-Source Projects

Weaviate

76 9,524 10.0 Go

Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database.

Project mention: pgvecto.rs alternatives - qdrant and Weaviate | libhunt.com/r/pgvecto.rs | 2024-03-13

gerev

28 2,601 8.5 Python

🧠 AI-powered enterprise search engine 🔎

Project mention: A FOSS chat bot trained on docs/ansible? | /r/selfhosted | 2023-06-05

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Nuclia DB

3 571 9.9 Rust

NucliaDB, The AI Search database for RAG

Project mention: Tantivy 0.20 is released: Schemaless column store, Schemaless aggregations, Phrase prefix queries, Percentiles, and more... | /r/rust | 2023-06-20

You have also NucliaDB that is built on top of tantivy and addresses vector search for documents and video search.

qlever

3 275 9.3 C++

Very fast SPARQL Engine, which can handle very large knowledge graphs like the complete Wikidata, offers context-sensitive autocompletion for SPARQL queries, and allows combination with text search. It's faster than engines like Blazegraph or Virtuoso, especially for queries involving large result sets.

Project mention: QLever – Fast Sparql Engine | news.ycombinator.com | 2023-12-10

citrus

1 92 7.6 Python

(distributed) vector database (by 0xDebabrata)

Project mention: Created a smol vector database in my free time. Looking to provide a LangChain integration soon! | /r/LangChain | 2023-05-06

It supports all the basic features like creating an index, inserting vectors and searching through them. Here's the GitHub link if anyone's interested in going over it: https://github.com/0xDebabrata/citrus

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).