Ride sharing services, Airbnb could be in the mix. : Last year saw some big exits for venture capital-backed technology companies. GitHub sold to Microsoft for $7.5 billion and Duo Security sold to Cisco Systems in a $2.35 billion deal, while Docusign, Dropbox and Zscaler all hit the public markets to reward investors. What will 2019 hold? Here is Mergermarket’s exclusive list of startups most likely to see a liquidity event in 2019. The Boston-based enterprise software and IT services company has been considering an IPO since at least 2014 and 2019 could be the year it pulls the trigger.