The Stay in Session block

The Stay in Session block keeps a WhatsApp conversation within the 24-hour free messaging window. WhatsApp charges for template messages sent outside the 24-hour window after a customer's last message. The Stay in Session block sends a lightweight session message to reset this window, letting subsequent messages be sent as free-form messages without template approval.

The 24-hour rule

WhatsApp allows free-form messages (no template required) for 24 hours after a customer last messages you. After 24 hours, you must use an approved template. The Stay in Session block resets this window by sending a minimal session message.

When to use it

Use the Stay in Session block when:

Your automation has a Pause block of more than 20 hours and the next step sends a free-form message
You want to avoid template charges for messages in an ongoing conversation
The customer is actively engaged and you want to continue the conversation naturally

Add the Stay in Session block

Open your automation in the Automation Builder.

Identify the Pause block that will cause the 24-hour window to expire before the next message.

Add a Stay in Session block just before the Pause block, or between the Pause and the next message.

Configure the Stay in Session message — this is a minimal message sent to the customer to reset the window. Keep it short and relevant: 'We’ll follow up shortly.' or simply a typing indicator.

Save the workflow.

What the customer sees

The Stay in Session block sends a real message to the customer. Make sure it makes sense in the context of your conversation — a blank or confusing message will damage the experience.

Stay in Session vs Typing Indicator

The Stay in Session block sends a message to keep the session open. The Typing Indicator block shows a typing animation briefly without sending a full message — it is subtler but resets the session window for a shorter period. For long pauses (12+ hours), use Stay in Session. For short delays (minutes), use Typing Indicator.

Cost implications

Using Stay in Session correctly can significantly reduce template message costs in long-running automations. Each avoided template message saves the Meta conversation charge. For automations with thousands of contacts in a drip sequence, this is material.

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When to use it

Add the Stay in Session block

Stay in Session vs Typing Indicator

Cost implications

Pause block

Typing Indicator

What gets charged inside a workflow