SMS Sending Limits

Clerk Chat applies sending limits based on your phone number type to help ensure compliance and reliable delivery:

• 10DLC Numbers – Best for high-volume business messaging.

• Toll-Free Numbers – Suitable for campaigns, but may have stricter limits.

• Long Codes – 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 Bandwidth’s Long Message Best Practices for guidance.

• Use the Twilio Message Segment Calculator to estimate message segments.

For details, see Clerk Chat SMS Limits.