I wondered how come PE Insider has the same logo as CFF Explorer and i found the answer at the CFF Explorer site:
Small announcement: the CFF Explorer was started as a side project many years ago. While I will continue to release updates from time to time, it is not going through radical improvements. If your organization needs professional PE inspection (not editing), then you might take a look at Cerbero Profiler (the commercial product of my company), which properly supports many file formats beyond the complete Portable Executable specification.
In addition to that we also offer a completely free PE viewer for the community called PE Insider.
I think CFF Explorer is more convenient than the community version of PE Insider.