Hotel Trimoorti Kolkata is one of the best budget hotels in kolkata and is quite a nice option if you are visiting the city with friends and family. I stayed here with my friends for 2 days last month and the staff was pretty amicable and helpful.
The rooms were spacious and well-equipped, so we had an enjoyable stay. We booked our stay through Travelguru and got some good hotel deals, as well: https://travelguru.com/hotels/India/kolkata/hotel-trimoorti-00006270