Search & Indexing Engines

QD

Qdrant

4.7/5.01 verified review

Freemium·Open Source·Apache-2.0

High-performance vector search engine written in Rust.

• Written in Rust for high throughput and low memory footprint.
• Native support for complex JSON payload filtering.
• Available as an open-source self-hosted edition.

35.4kstars on GitHub

IN

Infino

4.5/5.01 verified review

Freemium·Open Source·Apache-2.0

Search and analytics engine running natively over Apache Parquet files in object storage.

• Executes queries directly on Apache Parquet files in object storage without data duplication.
• Supports a compatible subset of Elasticsearch/OpenSearch DSL alongside REST and SQL.
• Open-source core licensed under Apache-2.0 for flexible self-hosting.

143stars on GitHub

CH

Chroma

4.5/5.01 verified review

Paid·Open Source·Apache-2.0

Open-source AI-native vector search infrastructure.

• Open-source Apache 2.0 license with massive developer adoption.
• Hybrid search support combining vectors, full-text, and metadata filtering.
• Built-in collection forking and dataset versioning for AI workflows.

29.6kstars on GitHub

OM

Omnigraph

4.3/5.01 verified review

Freemium·Open Source·MIT

Object-storage native graph database engine with Git-style version control and typed ontology.

• Typed graph data model with strict schema enforcement.
• Native Git-style versioning for graph data.
• Open architecture built on S3-compatible object storage.

2.0kstars on GitHub