I have used other email marketing tools like mailchip, constant contact and the list goes on. The best thing about TellWise is its simplicity. Everything from creating campaign to sending single email is crafted well for the user. It was bit difficult for me to identify faults or weakness in particular email template with other platforms. On tellwise, analytics are easy to understand and contact list of easy to manage.
SalesFlow is another time saving and life saving tool inside TellWise. It takes time to understand it's importance but it's worth it.
Sometimes, by mistake, you include a unsubscribed email in your new list for email. Thanks to tellwise, it saved me twice from sending to that contact. There are many things which I can keep on writing about, what I like.
I highly recommend Tellwise for your sales team. Review collected by and hosted on G2.com.