By default WAPT Pro license allows you to use 2 load agents. If you want to extend this limit, you can purchase additional agent licenses. Each agent can generate about 2,000 concurrent virtual users. If you need to create a significantly higher number, we recommend using the x64 Load Engines instead of the regular agents. One engine can create more than 10,000 virtual users. So, the total possible test volume is almost unlimited. You only need to build the proper configuration for your test with help of agents or engines.