usemoss/moss
Moss is a sub-10ms semantic search runtime with hybrid retrieval, built-in embeddings, and WebAssembly support for AI agents.

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Moss is a semantic search runtime designed for AI agent systems, providing hybrid retrieval combining semantic and keyword search with built-in embeddings and metadata filtering. It runs as an embedded SDK across browser, edge, on-device, and cloud environments, offering Python, TypeScript, Elixir, and C implementations without requiring a separate vector database cluster.
Frequently asked
- What is usemoss/moss?
- Moss is a sub-10ms semantic search runtime with hybrid retrieval, built-in embeddings, and WebAssembly support for AI agents.
- Is moss open source?
- Yes — usemoss/moss is open source, released under the BSD-2-Clause license.
- What language is moss written in?
- usemoss/moss is primarily written in TypeScript.
- How popular is moss?
- usemoss/moss has 556 stars on GitHub.
- Where can I find moss?
- usemoss/moss is on GitHub at https://github.com/usemoss/moss.