RawTherapee is a very interesting alternative to LightRoom. I have switched several months ago and I will not go back. The advantages of RawTherapee are manifold:
(1) Free of charge
(2) Very good online documentation.
(3) Very helpful developer community.
(4) Many interesting features which I could not find in LightRoom 6.
(5) You can participate in improving the software.
(6) RawTherapee respects privacy.
“RawTherapee is free and open source software, meaning you can use it free of charge, wherever you like on whatever hardware you like, as long as you abide by the copyleft GPLv3 license. Download the source code, modify it, feel free to do what comes to mind.”
Download from https://rawtherapee.com
Check out RawPedia on rawpedia.rawtherapee.com
And the Forum at discuss.pixls.us/c/software/rawtherapee.
RawTherapee 5.4 did not support my monochrome camera. I have created an issue and the next day I received a test version which supported my camera. This fix is included in RawTherapee 5.5.
There is a long list of features at RawPedia. However I use post processing sparely. My favourites are:
– 4 different methods of highlight reconstruction
– Contrast by Detail Levels
– Soft Light
You can request missing features and report issues. For this you do not need to be a developer.
RawTherapee does not use any cloud. Remember that there is no cloud but only other people’s computers.
Note that non-cloud Adobe software is closed source you do not know what their programmes are actually doing when you computer is connected to the internet.
I understand that RawTherapee is a converter, but missing the other functions like library, printing and so on.
An interesting alternativ. You can also look into Capture One (commercial), Luminar (commercial) or Darktable (open source).
I think that you should decide for one and stick to it, as you are also not continuously switch your camera.
I have also worked with Darktable 2.2. On one hand I liked it a lot. However the responsiveness of the GUI was very poor. Apparently that was a problem of MacOS X and X11/Quartz. I have been in contact with some developers for several months but they could not sort it out. So I switched to RawTherapee.
Maybe the new version Darktable 2.6 runs smoother under Mac OS X. Supposedly, under Linux it run always fine.