eDataSource was acquired by the team at MessageSystems who also own the ESP SparkPost. eDataSource was originally founded by Bill McCloskey, and was later run under the leadership of G.B Heidarsson before the acquisition.
Inbox insight and deliverability testing tools and metrics are provided by eDataSource. A fairly comprehensive set of email marketing deliverability monitoring and alerting tools providing performance insight and analysis for a variety of email marketing, inbox delivery, and eCommerce activity.
They track millions of emails daily across hundreds of thousands of brands. eDataSource provides a set of strategic deliverability and placement tools and services for digital marketers, agencies, publishers, and marketing service providers.