Most email marketing comparisons focus on feature checklists. But after testing dozens of platforms, I have found that a few things matter far more than the length of the feature list.
Deliverability is the foundation. If your emails land in spam, nothing else matters. The best platforms invest in sender reputation, offer authentication tools (SPF, DKIM, DMARC), and actively monitor deliverability across providers. ActiveCampaign, MailerLite, and Brevo consistently score well here.
Automation depth separates basic senders from real marketing tools. Every platform offers "automation" now, but the range is enormous. Some give you basic autoresponders. Others, like ActiveCampaign, let you build multi-step workflows with conditional logic, lead scoring, and CRM triggers. Know what level you actually need before paying for features you will not use.
Pricing models vary more than you think. Some platforms charge per subscriber (MailerLite, Kit), others per email sent (Brevo, SendPulse). If you have a large list but send infrequently, per-email pricing saves money. If you send daily to a small list, per-subscriber works better. Check the ActiveCampaign pricing breakdown and Brevo pricing guide to see how costs scale at different list sizes.
Ease of use is subjective but critical. A platform with every feature in the world is worthless if your team cannot figure out the email builder. MailerLite and Sender nail simplicity. ActiveCampaign and GetResponse have steeper learning curves but reward the investment.
Finally, think about where you are headed. Switching email platforms is painful because you lose automation workflows, templates, and sender reputation. Pick a tool that fits today and can grow with you for at least 2-3 years.
