In a nutshell
Grassroots Journals assess the quality of scientific studies and aim to make it irrelevant where a study was originally published.
A grassroots journal collects, assess, categorizes and ranks all articles relevant for a specific topic/community. Thus it brings together articles that are now spread over many publications and provides a better access to the scientific literature. It does not publish articles, but only reviews them.
Post-publication review means that the assessments are up to date. It includes articles of all quality levels by quantifying the quality; this avoids making multiple reviews for multiple journals. All assessments are open access and the code open source.
Goals and intentions
Breaking the power of the traditional publishers and bringing the assessment what good science is back to the scientific community.
What is reviewed