Based on bartender favorites and customer ratings, here are the best options currently on the market:
A favorite in the UK and high-end US bars, Funkin comes in a soft pouch and contains nearly 80% real fruit with no artificial colors or additives. It has a very high fruit-to-sugar ratio, providing a more "crushed fresh berry" experience than a syrup.
“I prefer Ravi brand though (I think it is French). I get it through our speciality purveyor.” Reddit · r/bartenders · 10 years ago “Boiron - no contest in my opinion.” Reddit · r/bartenders · 10 years ago