> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lyzr.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Vector Stores

Lyzr supports multiple vector databases for knowledge base storage. You bring
your own credentials for most; Weaviate and Qdrant are available with Lyzr's
default credentials for quick setup.

## Supported vector stores

| Store          | Default credentials | BYOK                             |
| -------------- | ------------------- | -------------------------------- |
| Weaviate       | ✅                   | ✅                                |
| Qdrant         | ✅                   | ✅                                |
| Milvus         |                     | ✅                                |
| PG Vector      |                     | ✅                                |
| SingleStore    |                     | ✅                                |
| Neo4J          |                     | ✅ (required for Knowledge Graph) |
| Amazon Neptune |                     | ✅                                |

The vector store is selected when you create a Knowledge Base. You can't change
the store after creation — create a new KB if you need to migrate.

## Configuring credentials

Go to **Data Connectors** → **Create New** → select the vector store type
→ enter credentials.

Credentials are stored encrypted and scoped to your organization.

## Choosing a vector store

For most use cases, **Qdrant** (fast, free default credentials, good performance
at scale) is the right starting point.

Use **Neo4J** when building a Knowledge Graph.\
Use **SingleStore** if you're already running SingleStore for operational data.\
Use **PG Vector** if you want vector storage inside your existing PostgreSQL instance.