After the play was staged in Kochi she was approached by director Arun Dominic with an offer of a role in his film Tharangam.
[4] Reviewer Anjana George of The Times of India wrote that Santhy "deserves a special mention as she has given life to Malu, the otherwise loving girlfriend with an interesting psychological disorder, pretty well".
[10] She enacted the only female character in Lijo Jose Pellissery's Jallikkattu (2018) where she played Sophie, "somebody with her own agenda and who is no pushover", according to Santhy.
[13] Sajin Shrijith of The New Indian Express wrote: "Santhy Balachandran shines in a role that evokes the yesteryear performances of Revathi and Urvashi".
[17] Santhy starred opposite Soubin Shahir in the fantasy drama film Djinn, directed by Siddharth Bharathan.