Neighbor

Category: SDKs & Libraries
Website: https://github.com/ankane/neighbor
Ecosystem: Ruby, Rails

Overview

Neighbor is a Ruby gem that adds approximate nearest neighbor (ANN) and vector similarity search to Rails applications. It integrates with multiple database backends, including pgvector, to enable efficient vector-based querying directly from Ruby.

Features

• Nearest neighbor search for Rails

  • Provides high-level Ruby/Rails interfaces for performing nearest neighbor and similarity searches.

• Database backend support

  • Postgres
    • Supports the cube extension.
    • Supports the pgvector extension for vector similarity search.
  • MariaDB 11.8
    • Native support for nearest neighbor search on this version.
  • MySQL 9 (experimental)
    • Nearest neighbor searching supported when using HeatWave (experimental status).
  • SQLite (experimental)
    • Supports vector search via sqlite-vec.

• Additional ecosystem integrations

  • Companion libraries for other storage backends:
    • Redis via neighbor-redis.
    • S3-based vectors via neighbor-s3.

• Ruby gem packaging

  • Distributed as a standard Ruby gem for easy inclusion in Rails and other Ruby applications.

• Open-source licensing

  • Licensed under the MIT license.

Pricing

Neighbor is open source under the MIT license and can be used free of charge.