Pre-IPO companies using ServiceNow

I'm a SN developer and I'm looking to move to a new company late this year, early next. Are there any private, pre-ipo companies I should look at that are using ServiceNow? I've also been exploring breaking away from SN and moving to another aPaaS. What are some other platforms I should review that are up and coming? I'm not really interested in SalesForce as it's well established. YoE: admin 3, dev 2