Any alternatives to chronosync, that can sync 2 folders in real time and keep them identical?
Most sync tools are not real time. Can be very frequent, but I have never used that are live/real time.
Would a cloud based tool (OneDrive, DropBox, Box, etc.) Work? Some will snyc within a few minutes, assuming you on line. Depending on the size of what needs to stay sync'd, it might be a reasonable option.
If it is a large data set (more than about 5 GB)....maybe not.
One of the few commercial tools to consider:
Resilio.
Open source too (I have not used it) that might help is
SyncThing
SeaFile looks good, but never used it. Free for up to 3 users I see.