When comparing Libre Computer ALL-H3-CC (Tritium) vs HiFive1, the Slant community recommends HiFive1 for most people. In the question“What are the best completely open-source (considering even the bootloader, all drivers, availability of Gerber files, etc) active single board computer designs?” HiFive1 is ranked 3rd while Libre Computer ALL-H3-CC (Tritium) is ranked 4th. The most important reason people chose HiFive1 is:
Completely open-source CPU architecture.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fewer binary blobs than other SBCs
Pro RISC-V
Completely open-source CPU architecture.
Pro Arduino-compatible
Compatible with Arduino software and accessories, making it an effective drop-in replacement.
Cons
Con ARM SoC, so will always involve binary blobs
Con Documentation is lacking
...but community documentation resources are maturing.
Con Designed with Altium
"The design files for the HiFive 1 were made with Altium, a proprietary and non-Free software."
Con Leverages an FTDI chip, so not fully open-source
"This is an Arduino-compatible board with an FTDI chip providing the USB to serial conversion. [...] An FTDI chip is not Open Source, and they have designed drivers to break chips that aren’t theirs."