Yes, both Snapup and ScreenshotOne offer a Free Trial.
Snapup is designed for Large Enterprises, Medium Business and Small Business.
ScreenshotOne is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Snapup Starts at $19/Month whereas for ScreenshotOne Starts at $12/Month when Billed Yearly.
Some top alternatives to Snapup includes ScreenshotsCloud, Urlbox, Full Page Screen Capture, Screenshot Machine, Page2Images, GrabzIt, ScreenshotAPI, Screenlapse, Screendot and Awesome Screenshot.
Some top alternatives to ScreenshotOne includes Capture, ScreenshotsCloud, GetScreenshot, Screenshot Machine, ScreenshotAPI, Screendot, Qualified, TakeAscreen, TinySnap, Workvivo and IFTTT.