The best alternatives to Dispatch are Trello, Mail by Apple, and TL;DR Email. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Dispatch?
General Collaboration— One inbox for all your work discussions
Trello is a web-based Kanban-style list-making application. Originally made by Fog Creek Software in 2011, it was spun out to form the basis of a separate company in 2014 and later sold to Atlassian in January 2017.
Our mission is to make people more productive by enabling technology to millions. We strive to create the best experiences on mobile and desktop for those who want to be more productive.