Neither Thumber nor Previewmojo offers a free trial.
Thumber is designed for Large Enterprises, Medium Business and Small Business.
Previewmojo is designed for Freelancers, Medium Business and Small Business.
Pricing for Thumber Starts at $7/Month when Billed Yearly whereas for Previewmojo Starts at $9.
Some top alternatives to Thumber includes Imagify, Bannerly, Qualified, Previewify, Quicq, Workvivo, Sigmail, Polish, Baseline, AppLaunchpad, Mugshot Bot and Previewmojo.
Some top alternatives to Previewmojo includes CloudSocial, Posted, Bannerly, TweetShots, Postaside, Qualified, Previewify, Workvivo, Thumber, Featured Image Creator, Blog To Social and IFTTT.