As Terran
Make:
Viking
Marine
GhostKill Ravens before matrix changes the tank or air fight.
Open in the counter tool with Raven tagged ->As Protoss
Make:
Stalker
Phoenix
High TemplarFeedback or Blink pressure removes Raven energy.
Open in the counter tool with Raven tagged ->As Zerg
Make:
Hydralisk
Corruptor
ViperRavens are expensive targets. Abduct or focus them early.
Open in the counter tool with Raven tagged ->
Marauder
Reaper
Hellion
Hellbat
Widow Mine
Cyclone
Siege Tank
Thor