Which free SMS software works well? Software that can send short messages in groups.

There is no free mass messaging software. Methods and steps of sending short messages in groups:

First, log in to the account, import the number to send SMS, and filter the mobile phone number and duplicate number (one-to-one mass sending is also possible);

Then, edit the message content. After editing, you need to check and modify keywords.

The last step is to click Send.