Yes, both Previewify and Featured Image Creator offer a Free Trial.
Previewify is designed for Large Enterprises, Medium Business and Small Business.
Featured Image Creator is designed for Individuals, Medium Business and Small Business.
The starting price of Previewify begins at $7.50/Month when Billed Yearly, while pricing details for Featured Image Creator are unavailable.
Some top alternatives to Previewify includes Bitly, ShortURL, ClickToTweet, Tapz, Short.io, Switchy, mainpage.me, Linkjoy, MyLinks On Acalytica and Thumber.
Some top alternatives to Featured Image Creator includes CloudSocial, Posted, Bannerly, TweetShots, Postaside, Qualified, Workvivo, PopGraph, Blog To Social, SayHey and IFTTT.