The main limitations are that SMS messages must be kept short and simple, rich media like videos and menus do not work well, international costs can add up quickly, and SMS is highly regulated with strict consent rules and fines.

SMS chatbots are highly effective for flash sales, appointment reminders, and urgent updates because of their near-universal reach and high open rates. However, they have important constraints. Text messages are best kept brief, so long responses or complex conversation flows feel overwhelming in a text thread. Rich media such as videos or extensive menus do not translate well over SMS, making the method better suited for simple back-and-forth exchanges. If you have an international audience, costs can rise quickly because normal messaging rates apply in each country. Most critically, SMS is heavily regulated; every country has its own rules, and in the United States the CAN-SPAM Act requires explicit written consent before sending messages, with fines ranging from $500 to $1,500 per violation.

Key points

SMS messages should be short and direct; lengthy or complex flows overwhelm users.
Rich media like videos and extensive menus do not work well over SMS.
International messaging costs can add up because standard rates apply per country.
SMS is highly regulated; in the US, explicit written consent is required under CAN-SPAM.
Violating SMS regulations can lead to fines of $500 to $1,500 per message.

What are the main limitations of using SMS chatbots for business communication?