Chose Outlook4Gmail
I believe Outlook4Gmail stacks up against AppNeta having a better graphic and simplicity. I have selected Outlook4Gmail because is more known and probably easier to find answers to questions when they may come.
Independently Invited by TrustRadius
A de minimis incentive was given to thank the reviewer for their time. The incentive was not used to bias or drive a particular response, nor was the incentive contingent on a positive endorsement. More Info