One of my friends is an alumnus of ISI Kolkata and here is his insight into the placements for MTech CS. 

1. The job profiles offered by ISI are mostly from Data Analytics. You will not get many CS core jobs from the placement drive. Don’t expect companies such as Google, Amazon, Microsoft, etc. 
2. As an M.Tech(CS) student, you will have a fair knowledge about IR, Pattern Recognition, Data Mining and you can easily get jobs at these visiting companies. 
3. In the recent placement drive, the highest package offered was INR 25 to 28 LPA while the average was INR 10 to 12 LPA.
4. ISI offers good job opportunities, but it is limited to a particular domain. Along with Data Analytics companies, few R&D centers like TCS Innovation, Infosys R&D, visit the placement drive. 

Other than that you can apply for summer internships and if you perform well you will receive PPOs. But if you are expecting a job strictly related to your field after the compilation of your masters then don’t choose ISI. It is an excellent option if you want to do a Ph.D. or want a career in research. 

WCE is an AICTE approved college whereas both COEP and VJTI Mumbai are autonomous government colleges. When compared, VJTI is the oldest engineering college between the three with the other two colleges being relatively newly established. When choosing between the three, students can compare placements, program curriculum, fee structure, and eligibility. 

The points mentioned below highlight the same:

Fee structure and eligibility:

The following table highlights the fee structure and eligibility for M. Tech in CSE at all three colleges.

Curriculum:

COEP Pune:

• The two-year course has a number of electives, mandatory programs as well as skill-based and interdisciplinary subjects.
• Students will learn subjects like advanced computer networks, databases, algorithms, and machine learning as well as data mining.

VJTI Mumbai:

• The course includes a few elective subjects and courses on computational methods and network programming.
• Some of these subjects include cloud architecture, advanced database management systems, information security among others.

WCE Sangli:

• The course at WCE also includes professional electives as well as a number of lab sessions and seminars.
• Advanced computer networks, computational mathematics, modern operating systems, data mining are some of the subjects included in this course.

Placements:

COEP Pune:

• With an average salary of INR 5.1 LPA, the college has recruiters like Accenture, Deloitte, IBM, Infosys hiring students from the CSE department.
• About 50% of students from the M. Tech department were placed for the year 2017-2018.

VJTI Mumbai:

• Students from the CSE department have an average salary of INR 6 LPA and companies like Ambuja Cement, Blue Star, Deloitte, etc. hire students annually.
• The batch of 2018-2019 had a placement rate of 60%.

WCE Sangli:

• As of 2018-2019, the M.Tech class had a placement rate of 40.7% with 11 students out of 27 being placed.
• The average salary offered is INR 6.5 LPA with companies like Dell, Microsoft, Thoughtworks hiring students.

Placement wise, VJTI is a safe option as it is a well-known government established college. Fee wise, it is also quite economical.