Tensionless string spectra on AdS3

The spectrum of superstrings on AdS(3) x S-3 x M-4 with pure NS-NS flux is analysed for the background where the radius of the AdS space takes the minimal value (k = 1). Both for M-4 = S-3 x S-1 and M-4 = T-4 we show that there is a special set of physical states, coming from the bottom of the spectrally flowed continuous representations, which agree in precise detail with the single particle spectrum of a free symmetric product orbifold. For the case of AdS(3) x S-3 x T-4 this relies on making sense of the world-sheet theory at k = 1, for which we make a concrete proposal. We also comment on the implications of this striking result.