The series opened to extreme positive reviews. Vignesh Madhu of
Cinema Express rated the series with 3/5 stars, stating that, "The word Vilangu is an apt title for a series which is about cops as well as a deceitful man, who hides a beast in him. Leaving aside the horrifying violence, the convenient plot points, and the insipid 'family' scenes, Vilangu makes for a compelling watch."
Behindwoods gave a rating of 3 out on 5 and wrote, "Strong performances from Vemal and Bala Saravanan, Ajesh's music and Prasanth's clever writing together propel Vilangu to a must watch zone."
The News Minute wrote, "Vilangu makes for a gripping watch because it downplays its surprises intelligently, and doesn’t fall back on flashy, unrealistic reveals that revolve around a hero cop (the background score, too, is committed to the plot and not Paruthi). It’s a cat and mouse game where we aren’t sure until the end who is the cat and who is the mouse. Well played."
OTTplay.com rated the series with 3.5/5 stars, called the series an edge-of-the-seat thriller.
Binged.com gave a rating of 6.25 out on 10 and wrote the film as Slow Paced But Engaging Police Procedural Thriller.
Galatta said "Vilangu is truly a comeback of sorts for Vemal and director Prasanth Pandiyaraj!" and rated the series 3/5 stars. == Home media ==