There are many private colleges in Kolkata, each with its own unique strengths and offerings. Here are a few highly regarded options:

1. Presidency University: Known for its strong academic reputation and diverse programs, Presidency University is a premier private institution in Kolkata.

2. Jadavpur University: While primarily a public university, Jadavpur University also offers private programs in certain fields, such as MBA and M.Tech.

3. Calcutta Institute of Engineering and Management (CIEM): CIEM is a well-established private engineering college with a focus on practical learning and industry collaborations.

4. Amity University Kolkata: Part of the Amity University chain, Amity Kolkata offers a wide range of undergraduate and postgraduate programs across various disciplines.

5. Techno India University: Techno India is a large private university with multiple campuses in Kolkata and other parts of India. It offers a variety of programs in engineering, management, and other fields.

6. Calcutta University: Although primarily a public university, Calcutta University also has a few private colleges affiliated with it, such as St. Xavier's College and Loreto College.

These are just a few examples of private colleges in Kolkata. When choosing a college, it's important to consider factors such as your academic interests, budget, and the college's reputation and facilities.