When you bought big email lists or your own data grew really fast over the years, you need to always keep your email lists updated to prevent yourself from being banned by the Email SMTP services for having high bounce rates.
I found the 10 biggest services and researched their prices. It is really expensive to keep your lists up to date.
|Name||Price per mail in $|
I hope you enjoyed this comparison and if you have suggestions, please write in the comments.