Overview
The Logic node routes conversations based on variable values. It evaluates conditions against your flow’s variables and sends the conversation down different paths — no LLM call required. Think of it as anif/else-if/else block for your flow.
How Branches Work
Each Logic node has one or more branches. A branch contains one or more conditions, and each condition checks a variable against a value using an operator. Branches are evaluated in order, top to bottom. The first branch whose conditions are all satisfied wins. If no branch matches, the default path is taken.Branch Logic: AND vs OR
| Mode | Behavior | Example |
|---|---|---|
| AND | All conditions must be true | Language is English AND state is Texas |
| OR | Any condition can be true | Status is “VIP” OR spend > 10000 |
Operators
| Operator | Description | Example |
|---|---|---|
equals | Exact match (case-sensitive) | {{language}} equals English |
not_equals | Does not match | {{status}} not_equals blocked |
contains | Variable contains substring | {{interests}} contains dental |
not_contains | Does not contain substring | {{email}} not_contains spam |
not_empty | Has a value | {{phone_number}} not_empty |
is_empty | Empty, null, or unset | {{email}} is_empty |
greater_than | Numeric: variable > value | {{age}} greater_than 18 |
less_than | Numeric: variable < value | {{budget}} less_than 500 |
starts_with | Begins with string | {{phone}} starts_with +1512 |
ends_with | Ends with string | {{email}} ends_with @gmail.com |
Default Path
Real-World Examples
Lead Qualification
- Branch 1 (AND): budget > 5000 AND company_size > 10 → “Qualified Lead” conversation
- Branch 2: budget > 1000 → “Warm Lead” conversation
- Default: “Nurture” conversation
Language Routing
- Branch 1: preferred_language equals Spanish → Spanish flow
- Branch 2: preferred_language equals French → French flow
- Default: English flow
Data Completeness Check
- Branch 1 (AND): name not_empty AND email not_empty AND phone not_empty → Proceed to API call
- Default: Loop back to conversation node for missing info
Related Pages
Conversation Node
The core dialogue node
Variables
Dynamic data in your flows
Extraction Nodes
Extract data from conversations
Flow Builder Guide
Comprehensive usage guide