Warframe has rich variety of Companions. They are basically go to missions with you and help you in variery of things. There are mainly 6 types of Companions:

  1. Sentinels – These are robotics hovering over the warframe head.
  2. MOA – These are robotics pets
  3. Kubrow – basically warframe Dogs
  4. Kavat – basically warframe Cats
  5. Predasite – infested warframe dogs
  6. Vulpaphyla – infested warframe cats
  7. Hounds – Parvos sisters pets