The film stars Avishek Karthik, Dhansika, and Baby Sathanya, with Daniel Annie Pope, Rajendran, Kaali Venkat, John Vijay, Kota Srinivasa Rao, and Sampath Raj in supporting roles.

[1] Kalyaan, a former participant on the reality show Naalaiya Iyakkunar, began making his directorial debut film, Kaathadi, during October 2014.

Sai Dhanshika was signed on to play a police officer, while Avishek Karthik, previously seen in Gautham Vasudev Menon's Vaaranam Aayiram (2008) and Nadunisi Naaygal (2011), was selected to portray the lead actor.

[6][7] During the shoot at Vagamon in Kerala, a group of drunkards came to the spot and briefly caused trouble before Dhanshika helped halt the issue.

[12] A critic from Cinema Express wrote that "With not many redeeming factors, Kaathadi is an amateur take on a run-of-the-mill story with twists that don't really raise eyebrows".