Best tool to measure KPIs

Research the best KPIs to measure an online event focused for a FUNDING startup (funding box). The event is to raise AWARENESS of the brand, so the kpis should be based on that.
After selecting the kpis (6-8) and explaining  why to use them, choose a TOOL or PLATFORM that best fits this purpose. Should be friendly and updated and useful for the type of business.

Elaborate the analysis as bullet points, not paragraphs.