Horrible service, horrible customer service, and they do everything they can to not let you cancel their service.
Campaigns weren't sending properly, had to make multiple tickets and spam their support so they actually work.
Customer service is extremely slow. And they don't help on their end, they mostly stick to their script speech telling you to read their guidelines. Sendinblue's service talks back in an hour and I spent a fraction of the price. Doesn't make sense. They don't put budget in service it seems.
They try their best to make get money out of you, can't remove credit cards, can't change them. Have to cancel in advance so if your team decides to change this month you can't, you're chained to their service. And they don't refund you. It's always your fault.
Despite having FREE plan they still keep charging, they are scammers.