Survivalist
Survivalist survivors are characters that mainly focus on preserving themselves or stalling long enough for the timer to run out or for the killer to stop chasing you. These survivors currently consist of Noob, 007n7, and Two Time.
For more information on the characters themselves check their character specific page.
Sentinel
Sentinel Survivors are characters that primarily focus on stunning the killer, or helping others in the middle of a chase. Most Sentinels have higher health or some way or regenerating it, which is because they are more likely to be chased by and/or come into confrontations with the killer, and their stuns can be long ranged or close ranged when it comes to defense. These survivors currently consist of Shedletsky, Guest 1337, and Chance.
For more information on the characters themselves check their character specific page.
Support
Support Survivors are characters that primarily focus on the wellbeing and safety of others, they have little in the means of defending themselves on their own other than relying on another teammate, running away, or general skill. All supports have lower health than average, but make up for it with massively helpful abilities that can heal or protect other survivors. These survivors currently consist of Elliot and Builderman.
For more information on the characters themselves check their character specific pages.