[2][3][4] The film brings back the team of Manoj Bajpayee and Suparn Verma, who earlier collaborated on The Family Man.

Sirf Ek Bandaa Kafi Hai is a courtroom drama[9][10] inspired by actual events of a five-year-long standalone fight of a regular session court lawyer Adv.

[17] The Sant Shri Asaramji Ashram Charitable Trust sent a legal notice to the producers of the film right after the trailer launch.

"[22] Grace Cyril for India Today rated the movie 3 stars out of 5 and wrote "With a narrative so sensitive, the screenplay has been handled with the utmost care.

"[23] Deepa Gahlot for Rediff.com rated the movie 3.5 stars out of 5 and wrote "Karki deftly balances the emotions of hope and despair and at one level, the film makes the audience feel good, that Nu and Solanki's battle was not in vain.

"[25] A critic from Firstpost wrote "One of the best scenes of Sirf Ek Bandaa Kaafi Hai is when Solanki (Manoj Bajpayee) tries to convince the minor girl on the terrace to fight against the god-man and not be scared.

"[26] The Times of India rated the movie 4 stars out of 5 and wrote "The movie, where only Advocate Solanki's name remains unchanged, while other characters are given screen names, handles the narrative with great sensitivity, even in the scenes when the defence asks Nu pointed questions about the incident or how mindfully the police handle the case.

"[28] A critic from The Quint wrote "In focusing on the ek bandaa (one man) at the centre of the courtroom drama, we see little of the stories bubbling around him.

"[29] A critic from CNBC TV18 wrote "The entire escapade, peopled with shady characters and accentuated by the ashram’s secluded and eerie premises, was as spooky as a true-crime documentary.

"[31] A critic from Lehren wrote "Most of all, there’s an unabashed borrowing of the Criminal Justice and Jolly LLB templates – a self-effacing advocate pitched against biggies in the legal business, a bit of wit attempted as the serious case proceeds and glimpses into the humble lawyer’s personal life.