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title: Vector Database | LlamaIndex OSS Documentation
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##### FAQ

1. [Do I need to use a vector database?](#1-do-i-need-to-use-a-vector-database)
2. [What’s the difference between the vector databases?](#2-whats-the-difference-between-the-vector-databases)

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##### 1. Do I need to use a vector database?

LlamaIndex provides a in-memory vector database allowing you to run it locally, when you have a large amount of documents vector databases provides more features and better scalability and less memory constraints depending of your hardware.

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##### 2. What’s the difference between the vector databases?

To check the difference between the vector databases, you can check at [Vector Store Options & Feature Support](/python/framework/module_guides/storing/vector_stores#vector-store-options--feature-support/index.md).

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