Secretly charged thousands in hidden fees - do NOT USE THIS SERVICE
I used Mailchimp for two years, but in the second year, they started adding additional contact fees to the order of $1000 per month without informing me or giving you the option to adjust my plan. When I tried to cancel, they gave me the runaround and tried to delay my cancellation, long enough to bill me for another month, which they successfully managed to do. This is a perfect example of a big company giving zero care or concern to their users. Their product is mediocre compared to other options, but this risk is not worth it at all