I don’t know all the ways to check credit score in India but I got mine via the following two methods:

  1. I clicked through the ad or email from a fintech offering free CIBIL credit score, followed the instructions on the resulting landing page, and got my credit score. I noticed that it was not from CIBIL. AFAIK, only CIBIL score matters, so I discounted this alternative credit score.
  2. When I logged out of online banking of one of my banks – I don’t remember which – I saw a banner ad for free CIBIL credit score. I clicked through and, at the end, did get my CIBIL score.