When comparing Seamonkey vs Inky, the Slant community recommends Inky for most people. In the question“What are the best e-mail clients for Windows?” Inky is ranked 15th while Seamonkey is ranked 16th.
Ranked in these QuestionsQuestion Ranking
Pro Not just an e-mail client
Seamonkey is more than just an e-mail client as it is a full featured web browser as well. This makes for a good app to use for those that dislike having many different apps on their devices as it is a bit like an all in one solution.
Pro Auto imports setting from Thunderbird
For those that would be making the switch from the Thunderbird e-mail client setup is quite easy with Seamonkey as it auto imports all previous Thunderbird settings.
Con Permanent CPU usage
Seamonkey permanently uses CPU (quite a few percents on a Intel i7). On a laptop this causes the fan to run (which make noise) and the battery to lasts less time.
Con Poor customer service
Developers changed their business model to the subscription based completely unanounced. Consequently, customers who hadn't logged in for a while could no longer access their account and remove their data. HQ rarely answer emails from users who have issues.
Con Not stable
Sometimes it stops working as it should be.
Con Inadequate editing tools
No font selection, size or color. Can't paste an image to send. No table builder, etc.