StackAdapt - Native advertising demand side platform.

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

Nativo - Nativo is an advertising technology platform for brand advertisers and publishers to scale, automate, and measure native ads

Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.

Zemanta - Zemanta is an online content and links suggesting platform that provides a plugin to the bloggers, publishers and other types of content creators.

Mailjet - All-in-one email service provider that provides maximum insight and deliverability results for both marketing and transactional emails.