Samthaan was the first runner-up of Pantaloons Fresh Face 2012.
Samthaan started off by being a part of episodic series like Life OK's Savdhaan India, MTV India's Webbed, Bindass's Yeh Hai Aashiqui, and Zing's Pyaar Tune Kya Kiya. His first lead role was Prithvi Sanyal in Channel V India's Best Friends Forever?.
From 2014 to 2015, he portrayed Manik Malhotra in MTV India's Kaisi Yeh Yaariaan opposite Niti Taylor. His character was reinstated in season two.