MailChimp - MailChimp is the best way to design, send, and share email newsletters.

Sparkpost - Deliver your app and website emails on time and to the inbox. Trusted to send 25% of the world's non-spam email. Email delivery for companies big and small.

Constant Contact - Constant Contact offers email marketing, social media marketing, online survey, event marketing, digital storefronts, and local deals tools.

SocketLabs - Marketing & transactional email delivery platform

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.

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