Summary List PlacementA super-private messaging app that pitches itself as the "most secure collaboration tool for work" has raised $21 million as it aims for widespread expansion. Munich-based Wire, which is backed by Skype cofounder Janus Friis, raised the funds in a Series B round after it was "flooded" with customer requests throughout the pandemic. Wire is among a batch of business-to-business communication firms jostling to take advantage of the growing shift towards hybrid working where employees divide up their time between working remotely and in the office.