IIB string theory on AdS3 with NS-NS flux admits two CFT descriptions, a WZW model on the string worldsheet, and a holographic dual CFT at the asymptotic boundary. This example of AdS3/CFT2 correspondence allows us to build a class of toy models of holographic dualities beyond the AdS/CFT correspondence by deforming the two CFTs. On the string theory side, we can perform a TsT transformations( T-duality, shift, and T-duality), leading to a new string background that interpolates locally AdS3 in the IR and linear dilaton background in the UV. On the boundary, the holographic dual is conjectured to be a single trace version of TTbar deformation. As supporting evidence, we find a matching of the deformed spectrum, the thermodynamics of black holes, and correlation functions.