I actually signed up for Kippt when initially searching for a Pocket alternative and there's a lot to like about it.
I didn't stick with it or sign up for pro for a couple of reasons.
Namely, lack of an app and what I find to be a "cluttered" experience.
Perhaps I'm missing something, but if I want to save the page I'm on (I know I can save a link directly with a right-click) to Kippt I hit the extension icon which prompts me for tags, a destination and requires an extra click to actually save. Contrast that with Pocket and historious where it's one click, done. Pocket actually does it best by temporarily presenting me with the option to add tags or go the list without insisting.
Now, if I want to search what I've saved on Kippt I head on over to kippt.com and I'm presented with something that (to me) resembles Outlook. I click into a little search field, type my search and hit enter. I wait, get results then click a link.
If the link came from Pocket, I get a largely empty page with yet another link to click to reach the actual content. (Links added directly to Kippt for later reading have a summary here, that's fine.)
Contrast that with historious. When I want to search what I've saved or imported from Pocket I head to historio.us and instantly it's Google for my stuff. I start typing and hit enter. My results appear immediately, if I want to go straight to source I hit the main link, if I want a reader view I hit mobilize below it, if I want to publish it on the public Google for my stuff at user.historio.us I hit publish.
As you can see, relative to that experience, Kippt requires "extra" steps for every common action I use.