We're currently also looking into Azure options. 

Before we chose AWS, we used Microsoft Azure. We had a host in Royal, Google, and SAP as well. SAP has hosting on the cloud. We can host SAP on SAP Cloud. However because of cost and stability, we chose AWS. There are many things we compared between this, Azure, Google, and SAP. SAP is very expensive compared to AWS. Google is also very expensive. Azure doesn't have the experience that AWS has. IBM also has a cloud, but it lacks the experience and is not multi-layer or multi-storage worldwide. AWS has many storage centers worldwide. Our system is based in Ireland, for example. There is a data center in India, Ireland, and many other stable countries. These days, it is hard to find a stable country. This was our criteria to choose the best vendor.

I would suggest looking at Elasticsearch. I am currently using it and I feel it is more flexible and easy to use.