Understanding throughput and how the Trust Score affects rate limits
The throughput is the number of SMS you can send per second to the carriers. Message sending throughput for SMS is measured in message segments per second (MPS).
Trust Score is a score assigned when your Brand is registered with The Campaign Registry. Trust Scores are grouped into several levels, from lowest to highest. Your Trust Score, combined with the type of your campaign, will determine your message throughput.
An additional 'secondary vetting' option is available ($40) if you have specific throughput needs. Contact support if needed.
Your maximum Trust Score without the additional vetting option will be 49 (or 4 MPS per the tables below).
STANDARD → “Low Volume Mixed” Use Case Message Throughput:
| Trust Score | Total SMS MPS toward major US networks* | AT&T SMS MPS | T-Mobile SMS MPS | Verizon SMS MPS |
| 0 - 100 | 3.75 | 1.25 | 1.25 | 1.25 |
Your messages toward all minor US carriers (small independent carriers comprising less than 5% of the overall mobile market share) will be based on the MPS rate you receive toward each major network, with a maximum of 10 MPS.
STANDARD → Mixed / Marketing Use Cases Message Throughput:
| Trust Score | Total SMS MPS toward major US networks* | AT&T SMS MPS | T-Mobile SMS MPS | Verizon SMS MPS |
| 75 - 100 | 225 | 75 | 75 | 75 |
| 50 - 74 | 120 | 40 | 40 | 40 |
|
25 - 49 (max MPS without additional vetting option) |
12 | 4 | 4 | 4 |
| 1 - 24 | 3.75 | 1.25 | 1.25 | 1.25 |
Your messages toward all minor US carriers (small independent carriers comprising less than 5% of the overall mobile market share) will be based on the MPS rate you receive toward each major network, with a maximum of 10 MPS.
STANDARD → Declared Use Cases Message Throughput:
| Trust Score | Total SMS MPS toward major US networks* | AT&T SMS MPS | T-Mobile SMS MPS | Verizon SMS MPS |
| 75 - 100 | 225 | 75 | 75 | 75 |
| 50 - 74 | 120 | 40 | 40 | 40 |
|
16 - 49 (max MPS without additional vetting option) |
12 | 4 | 4 | 4 |
Your messages toward all minor US carriers (small independent carriers comprising less than 5% of the overall mobile market share) will be based on the MPS rate you receive toward each major network, with a maximum of 30 MPS.
For information on verifying Toll-Free US/Canada numbers for messaging compliance, please review this article: Messaging Compliance for Toll-Free US/Canada Numbers