Pardon the tech speak, but to put you at ease, we are going to go there…
Colgate Pulse uses a sonic motor, normally called sonic vibrations, with up to 32,000 strokes per minute specifically intended to provide a safe brushing experience.
There have been numerous studies over many years proving the safety and effectiveness of powered toothbrushes in this "sonic" range of vibration.
So yes, Colgate Pulse is safe and dare we say, enjoyable because it avoids that aggressive brushing at the gum line where your enamel is thinnest. It’s one of those experiences where you don’t know what you are missing until you try it.