AG-Grid has some features that tabulator lacks, like multi-cell editing and cell group selection. (but these features will be coming soon to Tabulator)
AG-Grid focus's on being a fully functional spreadsheet where as tabulator goes more down the route of interactive table.
Tabulator has a publicly visible development roadmap so you can see roughly when new features are going to come online.
There is a new release every month or so, so if there is a feature you feel you need you can create an issue on GitHub to get it added to the roadmap.
Most importantly, Tabulator is FREE even for commercial use!
Ag-Grid lost my business for having a very complex, immovable licensing structure. I'm not sure who pays them but someone must be OK with it since they're still in business. It's a shame because I really like the quality of the code and would gladly pay their asking price if they would have a realistic outlook on educational organizations or startups.
I am VERY excited to start trying to use this instead.
The company I work for pays for Ag-Grid, which makes me sad. Overall I find it has been fairly difficult to work with, and there are a lot of breaking changes when upgrading from older versions. I think we could get away with something like Tabulator for most of our use cases. I'm definitely going to try to sell it to the team
AG-Grid focus's on being a fully functional spreadsheet where as tabulator goes more down the route of interactive table.
Tabulator has a publicly visible development roadmap so you can see roughly when new features are going to come online.
There is a new release every month or so, so if there is a feature you feel you need you can create an issue on GitHub to get it added to the roadmap.
Most importantly, Tabulator is FREE even for commercial use!