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USSDChatbotVoice (IVR)Automation

Filter

Continues the flow only when a condition is true, and stops the run quietly otherwise.

Filter is a gate. When its condition is true the flow carries on; when it is false the flow stops at the filter, without an error. On voice projects you can send rejected calls down a separate false path instead.

When to use it

  • Only continue an automation for events you care about, such as orders over a certain value.
  • Skip the rest of a flow for users who have already completed it.
  • When a false condition should lead somewhere rather than stop, use a Router with a fallback path.

Not for USSD projects

Filter appears in the USSD palette, but the USSD runtime has no implementation for it, so a USSD flow that reaches it fails. Use a Router instead.

Filter panel in UI Mode with one clause: state.orderTotal greater than 500

Settings

Prop

Type

On chatbot and automation projects, a Filter with no condition stops the project from publishing.

Outputs

HandleWhen the flow takes it
trueThe condition is true.
falseVoice projects only: the condition is false. With nothing connected, the call ends.

When the condition is false on other project types, the flow simply stops:

Project typeWhat happens when the condition is false
AutomationThe run ends and is recorded as successful. Nodes after the filter do not run.
ChatbotThe turn ends and the user gets no reply to that message.
VoiceThe call takes the false path, or ends if it is not connected.

Example

An automation starts on every new order from a webhook, but should only alert the sales team about large ones:

  1. Webhook trigger receives the order.
  2. Filter: input.total greater than 500.
  3. Messaging sends a WhatsApp alert to the sales lead.

Orders of 500 or less stop at the filter, and the run shows as succeeded.

Tips and limits

  • On chatbot and automation projects, connect only the true handle. Those runtimes do not read the false handle, and with both connected the passing path can go to either node.
  • A chatbot user who fails the filter gets silence. If they should hear something, use a Router and send the false case to a Reply.
  • On automation projects, a condition that throws an error (for example reading a field of an undefined value) counts as false.

Router

Set Fields

Automation triggers

Last reviewed 24 September 2026

Set Fields

Sets or transforms state variables by assigning a value or expression to each named field, so later nodes can read them.

Function

Runs your own JavaScript on values from the flow and passes its return value to the next node.

On this page

When to use itSettingsOutputsExampleTips and limitsRelated