MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Constant Contact - Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
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.
AWeber - AWeber is an Email marketing software that's easy to use. Send email newsletters & autoresponders and deliver top notch emails.