Can I chat with drivers from a third party fleet?

This article explains the Vromo driver chat function in relation to drivers from a third party fleet.

Unfortunately it is not possible to use the Vromo driver chat function to chat with third party fleets. This means that for jobs that are being completed by third party fleets, if you send a chat message on that job, it won't be seen by that driver as the feature will only work for jobs that are being completed by your own in-house drivers.