Ariticmail is an app and service that businesses can use to create white label email marketing campaigns. It works for a wide variety of email campaigns, and it's notable for having a huge variety of pricing plans, making it suitable for a wide variety of companies in a wide variety of use cases. Its only major weakness is a somewhat arcane user interface, creating a bit of a learning curve that competing services do not have. Ariticmail is a good choice if your company has both large and small email campaigns, and it is mostly feature-complete as well.