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

# Store integrations

> Integrate with store backends for LangGraph long-term memory.

Stores enable [long-term memory](/oss/python/langgraph/stores) in LangGraph, allowing agents to persist and retrieve information across threads.

To implement your own store for a custom storage backend, see [Build a custom store](/oss/python/langgraph/stores#build-a-custom-store).

| Backend                                                                                     | Package                                                                                    | Source                                                                                                                     |
| ------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------- |
| [In-memory](https://reference.langchain.com/python/langgraph.store/memory/InMemoryStore)    | [`langgraph-checkpoint`](https://pypi.org/project/langgraph-checkpoint/)                   | [langchain-ai/langgraph](https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint)                              |
| [PostgreSQL](https://reference.langchain.com/python/langgraph.store.postgres/PostgresStore) | [`langgraph-checkpoint-postgres`](https://pypi.org/project/langgraph-checkpoint-postgres/) | [langchain-ai/langgraph](https://github.com/langchain-ai/langgraph/tree/main/libs/checkpoint-postgres)                     |
| Redis                                                                                       | [`langgraph-checkpoint-redis`](https://pypi.org/project/langgraph-checkpoint-redis/)       | [redis-developer/langgraph-redis](https://github.com/redis-developer/langgraph-redis)                                      |
| MongoDB                                                                                     | [`langgraph-store-mongodb`](https://pypi.org/project/langgraph-store-mongodb/)             | [langchain-ai/langchain-mongodb](https://github.com/langchain-ai/langchain-mongodb/tree/main/libs/langgraph-store-mongodb) |
| Upstash Redis                                                                               | [`langgraph-store-upstash`](https://pypi.org/project/langgraph-store-upstash/)             | [Tghez/langgraph-store-upstash](https://github.com/Tghez/langgraph-store-upstash)                                          |

***

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