Best Email Validation System?

What are your favorite email cleaning services and which one has the highest result accuracy?

I have tried a couple but primarily i would want also some other opinions in order to find out if i’m using one of the best and also help users which are searching for similar answers.

I tried until now the following:

1. ZeroBounce
2. Email-validator.net
3. Emailvalidator.co

From what I’ve tested ZeroBounce has the greatest efficiency and also has some great features that work like data append. The price/validation is also extremely decent.

Second comes the E-mail validator but it lacks accuracy.

Third EmailValidator but i find it rather hard to use.

Waiting for some of your answers and experiences