Hey,
LlamaParse is the best Parser available on the market. It helps you to parse almost all kind of files and give you the bestest parsed results possible.
yes llamaparse is closed source. it has a 48 hr data rentention policy so that in case you try to parse the same file again in the given 48 hr timeframe, it does not have to parse again and can send the cached response.
You can read more here:
https://www.llamaindex.ai/llamaparseFor more @Sacha Bron can help you on this.