In the title molecular salt, C6H6N3 (+)·C7H7O3S(-), the components are linked by N-H⋯O hydrogen bonds into zigzag chains along [100]. These chains are further connected by weak C-H⋯O, C-H⋯π and π-π (centroid-to-centroid distances = 3.510, 3.701 and 3.754 Å) inter-actions into a three-dimensional network.