WebPlotDigitizer VS Silkscientific UN-SCAN-IT

What are some alternatives?

When comparing WebPlotDigitizer and Silkscientific UN-SCAN-IT, you can also consider the following products

Plot Digitizer - All-in-One Tool to Extract Data from Graphs, Plots & Images

Engauge Digitizer - This open source, digitizing software converts an image file showing a graph or map, into numbers.

DigitizeIt - Sometimes it is necessary to extract data values from graphs, e.g.

g3data - g3data is used for extracting data from graphs.

DataThief III - DataThief III is a program to extract (reverse engineer) data points from a graph.

GraphClick - GraphClick is a graph digitizer shareware for Mac OS X which allows to automatically retrieve the original (x,y)-data from the image of a scanned graphor fom QuickTime movies.