Private colleges also provide very good placements. It depends on college to college.

There are many private colleges who provide outstanding placements. Below is the list you can check

1-Amrita School of Engineering, Coimbatore
2-Birla Institute of Technology and Science, Pilani
3-BMS College of Engineering, Bangalore
4-Manipal Institute of Technology, Manipal
5-PSG College of Technology, Coimbatore

To check the complete list you can refer below link

Top Private Engineering Colleges

Good Luck!!