I like the integration into hubspot and scrubbing phone numbers off websites. It provides fax, voicemail and text services as well as powerdialer and sequences. I evaluated it against other options but the hubspot integration won me over. You could call 500 numbers in the powerdialer per day if you wish, which is also great. You can use it on your smartphone, have multiple lines, easily launch it with a Chrome Extension too. Review collected by and hosted on G2.com.

I would recommend you take the time to go through all the training as first time through it may not be intuitive. It is packed with features but once you get the hang of it, you wonder how you did without it. Review collected by and hosted on G2.com.