SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.

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.

Recurrr - Send recurring emails

Litmus - litmus tests and tracks your email campaigns, so you can always put your best design forward.

FollowUpThen - The simplest way to schedule an email reminder

Return Path - Inbox placement solutions from Return Path helps improve email deliverability and increases email marketing ROI.