Nil Battey Sannata opened to critical acclaim and was positively received by the audiences as well. It received overwhelming praise, chiefly for the direction, and for Bhaskar, Shukla and Tripathi. Kunal Guha of the
Mumbai Mirror wrote, "It's rare to come across films that force you to keep aside your yardsticks of what a good film is and dive into the experience". Namrata Thakur of
Rediff.com gave the film the highest praise and deemed it "an absolute gem", saying "there is hardly a dull moment in the film". She considered it the feel-good film of the year, comparing it to 2015's
Dum Laga Ke Haisha.
The Hindu journalist and film critic
Namrata Joshi included
Nil Battey Sannata in her year-end list of "Hindi films that made a mark in 2016". She thought of it "a warm, feel-good film which offers hope and the promise". and Shubhra Gupta of
The Indian Express noted that "the film relies on keeping things real". Mohar Basu in his review at
The Times of India described the movie as "unpretentious", saying that "the movie wins you over with its innocence and simplicity". Suparna Sharma of
Deccan Chronicle called it a "real film in a real setting about real people that delivers several empowering, powerful messages". The performances of the lead cast were chiefly praised by critics. Joshi, who was particularly impressed with the performances of Tripathi and Shukla, ascribed the film's appeal to its well-etched characters and their relationships which were "brought alive by a nicely put together ensemble cast". The view was shared by Rachit Gupta of
Filmfare, who noted that "the actors make this film so memorable". He gave Bhaskar the highest praise, saying that she delivered the "performance of a lifetime", while also praising Shukla's "super", Pathak's "phenomenal" and Tripathi's "masterclass" performances. In his review,
News18 film critic
Rajeev Masand deemed Bhaskar to be "the heart of the film" noting that with "not one note out of place, she grabs your attention". Udita Jhunjhunwala of
Firstpost praised Bhaskar, stating that "This is one of her most nuanced performances and a welcome change", and highlighted Tripathi, calling him the "scene-stealer as the zealous school principal". == Remakes ==