Yes, both Flipp and Previewify offer a Free Trial.
Flipp is designed for Individuals, Medium Business and Small Business.
Previewify is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Flipp Starts at $32.50/Month when Billed Yearly whereas for Previewify Starts at $7.50/Month when Billed Yearly.
Some top alternatives to Flipp includes Posted, Bannerly, Qualified, Previewify, Workvivo, Featured Image Creator, Image Charts, Stencil, APITemplate.io, React & Share and Postkit.
Some top alternatives to Previewify includes Bitly, ShortURL, ClickToTweet, Tapz, Short.io, Switchy, mainpage.me, Linkjoy, MyLinks On Acalytica and Thumber.