There is no company in Wu Hanyou that can send short messages in groups.

You can compare more, see the arrival rate, time, and see if there is data feedback and customer service. It should also be noted that some platforms said that the price was very low in the early stage, but they began to deduct money in the later stage. Sometimes there is no corresponding customer service after the delivery, which is inconvenient to solve the problem. Wuhan Renxin platform can be tested more.