Mailercloud

Mailercloud puts automation and behavioral triggers front and center, even on the free plan. You get 1000 contacts and 12,000 emails per month, with the ability to set up workflows based on subscriber actions (opens, clicks, or custom triggers). The interface is aimed at marketers, not developers, so setup is visual and doesn't require code.

Mailercloud fits growing businesses that are past simple broadcast emails and need to respond to subscriber behavior automatically. The free tier is generous with automation included, which is rare; most platforms gate automation behind paid plans. If you're building a funnel and want to scale beyond one-off sends, Mailercloud's free tier gives you real room to experiment.