JansZenAudio review for Klaviyo: Email Marketing & SMS

Tried several others, including MailChimp and Omnisend. This one is a little more expensive, but well worth it. Great support (much much better than the others), no nanny filters on your contacts (leaves role based addresses alone, for instance), and allows multiple lists that can be subsequently segmented. Haven't tried the automations, yet, but they look good and easy to use.