This document summarizes benchmarks for nonprofit organizations using text messaging. It finds that the average list growth rate for mobile numbers is 49.5% annually, while the average churn rate is 30.7%. The average unsubscribe rate for text messages is 0.69%. It also finds that call-in advocacy SMS has a response rate of 4.7%, six times higher than call-in advocacy emails. It provides details on best practices and metrics for different types of outbound text messages like fundraising, advocacy, and informational messages.