Just wanted to say there are Opensource alternatives to SAP that are used by organizations with large velocity not just in transactions but also in business pro

Just wanted to say there are Opensource alternatives to SAP that are used by organizations with large velocity not just in transactions but also in business process changes. For example, Zerodha one of the leading stock brokers in India seems to be using ERPNext. This is just from advertising data, but their CTO is frequently on HN and could probably provide more details.