Hi team! Looking for guidance on how to properly limit
concurrent calls in a campaign.
MY SITUATION:
- I uploaded a campaign of 150 contacts to test
- Vapi launched 6-10 calls simultaneously
- I need to limit it to maximum 2 simultaneous calls
per campaign
WHY:
- I'm running outbound campaigns in Spanish for a real
estate legal services business in Los Angeles
- Coming from ElevenLabs where this was easy to control
- Higher concurrency causes voicemail issues and gets
flagged as spam by carriers
- Need controlled pace to maintain call quality and
reputation
WHAT I'VE FOUND SO FAR:
- The campaign object doesn't seem to expose a
concurrencyLimit field directly
- Support AI suggested building an external runner
via Make.com or Node.js
- This seems overkill for what should be a simple
setting
QUESTIONS:
1. Is there a way to set max concurrent calls per
campaign directly in the dashboard or via API?
2. Can I reduce my account-level concurrency limit
(Reserved Concurrency / Call Lines) to force
campaigns to run slower?
3. Is there a recommended approach for users who need
2-3 concurrent calls instead of the default behavior?
Any help would be appreciated! Happy to share my
campaign ID privately if it helps diagnose.
Thanks!