Hello,
Agar is a very good option for vegan gummys. In fact, it is commonly used in many eastern European countries for the manufacture of different types of gums. Some of the advantages that agar offers are:
Low viscosity in hot solution, which makes agar easy to handle in industrial manufacturing processes.
High functionality regardless soluble solids content and pH.
Heat stability and control of synaeresis.
Texture can be adjusted depending on the dose of agar and the acidulants, for example.
Feel free to contact me for further information.