DNA India praises Sushant Singh Rajput’s convincing transformation, the detailed period setting and Dibakar Banerjee’s distinctive treatment, while noting that the mystery can feel slow in parts.

Hindustan Times calls it a slow cooked but rewarding thriller, praising its rich atmosphere, detailed filmmaking and Sushant's performance.

Koimoi praises the strong characters, suspense, period detail and tight execution, calling it one of Bollywood's better crime mysteries.

Bollywood Hungama criticizes the slow first half, dragged second half and overloaded screenplay, saying the mystery loses its thrill despite strong production values.

Filmibeat praises the cinematic treatment, period atmosphere and performances, calling it a well-made and engaging detective film.

TOI praises the production design, Sushant and the chilling climax, but says a shorter runtime would have made the mystery tighter.

India TV praises the film’s mystery, 1940s Calcutta setting, music and Sushant Singh Rajput’s performance, calling it an engaging and stylish detective thriller.

India Today praises the noir atmosphere, visuals, performances and mystery, calling it a strong watch for fans of the genre.

The Indian Express praises the period setting and supporting cast, but finds the second half slow and feels Sushant does not fully define Byomkesh.