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Redis Chat Memory

About Redis Chat Memory

The Redis Chat Memory node gives your n8n AI workflows persistent conversation memory using Redis as the storage backend. When you build chatbots or AI agents, the language model has no built-in memory between requests — every interaction starts fresh. This node solves that by storing and retrieving conversation history from Redis, so your AI can reference what was said earlier in the conversation and respond with full context.

Redis is a natural fit for chat memory because it is fast, lightweight, and designed for exactly this kind of ephemeral-but-important data. Conversation histories do not need the overhead of a relational database, but they do need low-latency read and write access. Redis delivers sub-millisecond response times, which means your AI agent can load a full conversation history without adding noticeable delay to the user experience.

For Australian businesses deploying AI agents for customer support, internal helpdesks, or sales qualification, conversation memory is not optional — it is what separates a useful assistant from a frustrating one. Customers expect the AI to remember their name, their issue, and what has already been discussed. The Redis Chat Memory node makes this work reliably, even across multiple workflow executions and server restarts.

The node supports session-based memory with configurable keys, so you can maintain separate conversation threads for different users, channels, or topics. Set a TTL (time to live) to automatically expire old conversations and keep your Redis instance lean. It integrates directly with n8n’s AI agent and chain nodes, requiring minimal configuration to add persistent memory to any conversational workflow.

Redis Chat Memory FAQs

Frequently Asked Questions

What does the Redis Chat Memory node do in n8n?

Why use Redis instead of a regular database for chat memory?

Do I need to run my own Redis server?

How do I manage separate conversations for different users?

What happens to conversation data when Redis restarts?

Can I limit how much conversation history is stored?

How it works

We work hand-in-hand with you to implement Redis Chat Memory

Step 1

Set up a Redis instance

Provision a Redis server — either locally via Docker, as part of your existing infrastructure, or through a managed cloud service. Note the host, port, and password. For production use, enable persistence and set appropriate memory limits.

Step 2

Create Redis credentials in n8n

In n8n, navigate to Credentials and create a new Redis credential. Enter the host, port, and password for your Redis instance. Test the connection to confirm n8n can reach the server before proceeding.

Step 3

Add the Redis Chat Memory node to your workflow

Place the Redis Chat Memory node on your canvas. Connect it as the memory sub-node to your AI Agent or Conversational Chain node. Select the Redis credential you just created.

Step 4

Configure the session key

Set the session key field to a dynamic value that uniquely identifies each conversation. Use an expression referencing the user ID, phone number, or session token from your trigger node. This ensures each user gets their own conversation thread.

Step 5

Set memory limits and TTL

Configure the session TTL to automatically expire old conversations — 24 hours works well for most support scenarios. Set the context window size to control how many previous messages are included in each AI request. Larger windows provide more context but consume more tokens.

Step 6

Test the conversational flow

Send multiple messages through your workflow and verify that the AI references previous messages correctly. Test with different session keys to confirm conversations are properly isolated. Check Redis directly to verify that records are being created and expired as expected.

Transform your business with Redis Chat Memory

Unlock hidden efficiencies, reduce errors, and position your business for scalable growth. Contact us to arrange a no-obligation Redis Chat Memory consultation.