Yes, both Screenia and Gyazo offer a Free Trial.
Screenia is designed for Large Enterprises, Small Business, Medium Business and Individuals.
Gyazo is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of Gyazo begins at $3.99/Month when Billed Yearly, while pricing details for Screenia are unavailable.
Some top alternatives to Screenia includes Capture, Screenshot Machine, Page2Images, ScreenshotAPI, Snapup, Screenlapse, TweetShots, Qualified, TinySnap, Workvivo, ScreenshotOne and IFTTT.
Some top alternatives to Gyazo includes ScreenshotsCloud, Urlbox, Browshot, Screenshot Machine, ScreenshotAPI, FireShot, Snapup, Screendot, Awesome Screenshot and Snippyly.