We report the discovery of three Transiting Exoplanet Survey Satellite Objects of Interest (TOI) with signatures of pulsation, observed in more than one sector. Our main goal is to explore how large is the variety of classical pulsators such as delta Sct, gamma Dor, RR Lyrae and Cepheid among TOI pulsators. The analysis reveals two stars with signatures of delta Sct and one of gamma Dor, out of a sample of 3901 TOIs with available light curves (LCs). To date, there is a very scarce number of known pulsating stars hosting planets. The present finding also emerges as an exciting laboratory for studying different astrophysical phenomena, including the effects of star-planet interaction on pulsation and timing detection of planetary companions. We have also identified 16 TOI stars with periodicities and LCs morphology compatible with different classical pulsating classes, but for most of them, the dominant frequency signals originate from contaminating sources. C1 [Gomes, R. L.; Martins, B. L. Canto; Fontinele, D. O.; Freire, R. Alves; de Amorim, R. G. S. B.; Leao, I. C.; Messias, Y. S.; Souza, R. A. A.; De Medeiros, J. R.] Univ Fed Rio Grande do Norte, Dept Fis Teor & Expt, Campus Univ, BR-59072970 Natal, RN, Brazil. [Almeida, L. A.] Univ Fed Rio Grande do Norte, Escola Ciencia & Tecnol, Campus Univ, BR-59072970 Natal, RN, Brazil. [Brito, A. C.] Inst Fed Ceara IFCE, Campus Sobral,Av Dr Guarani 317, BR-62042030 Sobral, CE, Brazil. [Lopes, C. E. Ferreira; Hazarika, D.] Univ Atacama, Inst Astron & Ciencias Planetarias, Copayapu 485, Copiapo, Chile. [Lopes, C. E. Ferreira; Hazarika, D.] Millennium Inst Astrophys, Nuncio Monsenor Sotero Sanz 100,Of 104, Santiago 7500000, Chile. [Janot-Pacheco, E.] Univ Sao Paulo, Dept Geofis Teor & Ciencias Atmosfer, Rua Mata,Campus Univ 1226, BR-05508090 Sao Paulo, SP, Brazil. C3 Universidade Federal do Rio Grande do Norte; Universidade Federal do Rio Grande do Norte; Instituto Federal do Ceara (IFCE); Universidad de Atacama; Universidade de Sao Paulo