Over the last 6 months I have been trying out various url shorteners they are all good, at the moment I like owly the best only because the image of an owl seems to be more memorable that bitdo or bitly. I can’t see any issue with any of them however.
Bit do http://bit.do/dYSzJ
Twitter :- https://t.co/ixhdMosxZe
Tiny URL https://tinyurl.com/y87y7jzb
There are a few more around also but in this niche there is not a great deal of further innovation that would be useful so I think the niche will stick with pretty much the above players for the time being at least – of course these all get 100 of millions of clicks each day and so on.