Best Email Marketing Software in 2026

Choosing email marketing software means matching campaign tools to the way you manage subscribers and communicate with them. Compared on A/B testing, audience segmentation, email automation, landing pages and native integrations, these entries cover several parts of campaign work. Compare monthly send and subscriber limits to gauge listed capacity, and check free-plan availability and the paid starting point when weighing costs. GetResponse, Mailjet and AWeber lead the opening entries, with ActiveCampaign and Klaviyo also among the first options. The ranking gives an order to consider, while the listed features and limits help you focus on what your campaigns require.