statuspage - A simple self-hosted status page site with an API written in Django under the BSD license.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
YUNO - YUNO is a web data driven company focussed on solving customer challenges in web data discovery and extraction space.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
Yonyx - Decision tree driven Interactive guides for customer service
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.