Top Free, Open-Source Alternatives to Ag-Grid for React in 2026

A comparison of six free, open-source React data grid libraries as alternatives to Ag-Grid in 2026. Covers TanStack Table (headless, ~15 kB, MIT), SVAR React DataGrid (~80 kB, MIT, full-featured), Simple Table (~39 kB, MIT for non-profits), react-data-grid by Comcast (~14.8 kB, MIT), MUI X Data Grid (~90-95 kB, Community MIT + paid tiers), and Mantine React Table (~45 kB, MIT). Includes bundle size and licensing comparison tables, detailed feature matrices covering in-cell editing, virtual scrolling, tree data, filtering, and more. Also briefly mentions PrimeReact DataTable and LyteNyte Grid as additional options.