SMS Sending Limits
Written By Jill Berkowitz
Last updated 3 months ago
Clerk Chat applies sending limits based on your phone number type to help ensure compliance and reliable delivery:
10DLC Numbers β Best for high-volume business messaging.
Toll-Free Numbers β Suitable for campaigns, but may have stricter limits.
Long Codes β Lower throughput; better for small-scale use.
If you exceed your limit, delivery may be delayed or throttled. To manage this:
Keep messages under 9 segments.
Review Bandwidthβs Long Message Best Practices for guidance.
Use the Twilio Message Segment Calculator to estimate message segments.
For details, see Clerk Chat SMS Limits.