ActiveCampaign offers Free Trial, but LetMailBox does not.
ActiveCampaign is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
LetMailBox is designed for Medium Business, Small Business and Individuals.
The starting price of ActiveCampaign begins at $29/User/Month, while pricing details for LetMailBox are unavailable.
Some top alternatives to ActiveCampaign includes Outgrow, CleverTap, Moosend, Omnisend, Hubspot Marketing Hub, Klaviyo, Constant Contact, MailChimp, MailerLite, AnyFunnels, ConvertKit, ClickFunnels, Contactspot and Flodesk.
Some top alternatives to LetMailBox includes and undefined.