What companies in Israel are doing fascinating data science?

Hi, all - I'm planning a trip to Israel in June and would love to explore the big data community out there when I visit. Specifically, I'm interested in tools that empower data science (like H20Data, Dato, Spark's ML Lib, etc.) but also in the next generation of architecture. Specifically, frameworks for stream processing, in-memory computing or graph analytics.

Would love to get HN's thoughts on the state of the art out there.