# Novu Trigger Notification

> knock-setup twin. Topic fan-out bills one run per matching subscriber

**Subcategory:** Novu  
**License:** MIT  
**Source:** https://github.com/novuhq/skills/blob/main/skills/trigger-notification/SKILL.md

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## When it is useful

Trigger Novu workflows (single, bulk, broadcast, topic). knock-setup twin for sending. Topic fan-out bills one workflow run per matching subscriber vs Free 10,000 runs/mo. Meter is workflow runs, not Knock messages. Downstream email/SMS still billed. Distinct from knock-setup.

## The Catch

knock-setup twin. Topic fan-out bills one run per matching subscriber vs 10k Free runs/mo. Meter is workflow runs, NOT Knock messages. Over-limit does not throttle. Distinct from knock-setup. Downstream SendGrid/Twilio still billed.