Hello, Devesh!

Undoubtedly, IITs are the best colleges when it comes to engineering.

But, their are some colleges which gives a strong competition to IITs.

Here are list of those colleges for mechanical engineering:

1. BITS, Pilani.
2. Jadavpur University, Kolkata.
3. Delhi Technological University (DTU).
4. College of Engineering, Pune (COEP).
5. College of Engineering, Anna University, Chennai.

These are well reputed colleges and have a great placement records.

All the best!

Hope this helps!