Thanks for your message. You get to use the free trial when you first register which gives you up to 5.5 GB of streaming data. However, depending on how much streaming you have to do, the quality of your live stream, etc. you may need a subscription plan. You can check out our calculator to find out which plan would be best for your streaming needs https://wpstream.net/pricing/#band_calculator
Hope this helps and please let us know if there is anything else we can assist you with.