Is Sentinel data free?

I understand that Sentinel is a popular platform for cryptocurrency and blockchain analytics. However, I have a question regarding their services. Are the data provided by Sentinel free to access for users? Or do they charge a fee for accessing the information? I'm curious about the cost structure and if there are any limitations to the data available without payment. It would be great to have some clarity on this before I start using Sentinel for my research or investment decisions.