Pathfinder has a 'scorpion whip':
Whip, Scorpion
Cost 5 gp Weight 3 lbs.
Damage 1d3 (small), 1d4 (medium) Critical x2 Type slashing
Category light Proficiency exotic
Weapon Group flails
Special disarm, performance, reach, trip
This whip has a series of razor-sharp blades and fangs inset along its tip.
It deals lethal damage, even to creatures with armor bonuses. If you are proficient with both the scorpion whip and whip, you can use a scorpion whip in either the normal way (as a light performance weapon) or as a whip. When you use a scorpion whip as a whip, it is equivalent to a whip, but deals lethal damage and can harm creatures regardless of their armor bonus.
For comparison, here is the standard whip in Pathfinder:
Cost 1 gp Weight 2 lbs.
Damage 1d2 (small), 1d3 (medium) Critical x2 Type slashing
Category one-handed Proficiency exotic
Weapon Group flails
Special disarm, nonlethal, reach, trip
A whip deals no damage to any creature with an armor bonus of +1 or higher or a natural armor bonus of +3 or higher. The whip is treated as a melee weapon with 15-foot reach, though you don’t threaten the area into which you can make an attack. In addition, unlike most other weapons with reach, you can use it against foes anywhere within your reach (including adjacent foes).
Using a whip provokes an attack of opportunity, just as if you had used a ranged weapon.
You can use the Weapon Finesse feat to apply your Dexterity modifier instead of your Strength modifier to attack rolls with a whip sized for you, even though it isn’t a light weapon. Wielding a whip in two hands does not add 1-1/2 times your Strength modifier to damage rolls as with other weapons (UE update).