The tech stack waterfall should be the most effective tool for this task. By applying the technology filter set to 'Five9,' the search process will automatically initiate. Once the technology is located in the tech stack, it will be returned by the respective providers. I've recorded a video demonstrating how to set up and use the integration effectively: Loom Video.
I hope this was helpful. If there's anything else I can assist you with, please let me know!