MailerSend operates on a freemium model. As of 2025, the tiers are generous.
You can have the most beautiful API in the world, but if the email lands in spam, it’s worthless. MailerSend treats deliverability not as a feature, but as a continuous engineering process. mailersend
However, features like dedicated IPs and email validation cost extra. This is fair—those are consumable resources. MailerSend operates on a freemium model
import MailerSend, EmailParams, Recipient from "mailersend"; MailerSend treats deliverability not as a feature, but
Migrating to MailerSend usually takes under 30 minutes.
If the marketing team suddenly wants to send a massive weekly promotional newsletter to 50,000 subscribers, MailerSend is not the tool for the job. It is strictly built for infrastructure/transactional mail. To do marketing newsletters, the team would have to integrate a separate platform (like MailerLite or Beehiiv). The Scale Ceiling: