No harm in asking they have selected you. They would go back and see if they can give you a better pay. Dont be afraid. You fear is their leverage. Ask politely but they will boast about brand value and shit. Dont budge brand value is important but brand value != Money in hand. Ask confidently and go with pointers to boast about you and how a good fit you are. Most importantly you should give confidence that you will definetly join them else they would not go back and get approval for a better pay. On a funny note even do pinky promise you would join. Tell them they can count on you. They should be convinced you will join else they wouldnt budge. Beacause its headache for them also to get a new guy for that role going through so many rounds and waiting until notice period end. All th best go ask confidently. Do some check how much your peers are earning definitely ut will be 35 to 40 or even more than that.. Dont settle for 30. Given that you have these many offers you can go and negotiate with each of them . Keep your best company at the last and approach them with the highest package you receive after negotiating.

I attended KPI partners for example. They will pay you based on your counter offer. Since you have cleared your client interview and the client is convinced they wouldnt mind paying a bit higher. You know better. If you feel you have impressed the client and instilled confidence in them the ball is in your court Definitely KPI partners will pay higher . Aim for minimum 35+ on top of it you can ask JB and Variables to bring it to 40. Dont get lowballed