Expensive?
I am CTO at ag-Grid competitor(FancyGrid). And I used ag-Grid to check it in details.
You will find more in future.
I use it for one of client, Financial service. I found bugs in ag-Grid, they wrote that it is custom work and that they will start custom work from 50,000$ only.
About ag-Grid and Handsontable...
I am founder of another JavaScript Grid product.
FancyGrid - https://fancygrid.com
I know much about this market and situation.
ag-Grid is too popular and trampled all competitors over
catching almost all possible commercial clients.
It is unreal to compete with them, they killed this market and become monopolist.
Handsontable has no way to do.
Now ag-Grid also is going to kill JavaScript Chart Libraries market.
Sorely ag-Grid is too successful and leaves no chance for competitors to survive.
You will find more in future. I use it for one of client, Financial service. I found bugs in ag-Grid, they wrote that it is custom work and that they will start custom work from 50,000$ only.