The data analysis engine that most people use most commonly is something like an Excel spreadsheet with charts to look at the data that they have collected. However, once the dataset gets bigger, the tools to analyze the data also need to scale. Additionally, as the dataset gets bigger, it is managed through a database or other engines.
One company, called Chartio has made it their business to create graphical representations of large datasets. They take inputs from various sources, databases and create variety of plots. This was a need for large datasets like a logfile with multiple statements and datapoints.
A few years ago , thinking there was a need for charting websites would have been unheard. However, there are several other niches with Big Data that need to be filled and it will be upto companies that realize the needs and fulfill it.