If a colleague needed a platform with fast customer service and detailed reporting to sell their mobile inventory then I would recommend Rubicon Project. However, if my colleague needed a platform that gave instant current reporting data then I would be less likely to recommend Rubicon Project to them.
If Remarkety can be integrated with your website I would 10/10 recommend it every time. They have great reporting features and offer different options for automation campaigns or you can even create your own custom automation campaigns. If you are only using it for newsletters you'll still see benefits but it's not going to be near as beneficial unless you add in automation.
Cleanest supply ecosystem. They are skilled at processing inventory and bids in order to streamline monetization and drive yield.
Client support is excellent. Client services is deeply invested in your business and successful at driving key business goals within your organization when working on your behalf.
Remarkety has many more features compared to Mailchimp. The integration to my webshop was extremely easy to set up and I like to use the interface from Remarkety. You get lots of predefined trigger points for your automation and building email templates is just as easy as it was with Mailchimp.
Rubicon Project has made it easier to optimize so that we could get the fullest ROI on our inventory through their alerts on which deal needs troubleshooting.
They also send a daily report which notifies you which advertisers have low render rate which is very helpful when figuring which creatives need to troubleshooting.