Most guidelines from raw feeding websites suggest you go from kibble to canned, then to raw. That's how I got my two to eat raw, but they were kittens, so it was much easier to transition them than a full grown adult cat that's been set to eat dry food only for several years.
I used the pate style canned, added some warm water and used that gravy mixture on top of tiny cuts of raw muscle meats like a chicken thigh. Gradually you add less gravy and add more meats, and make it chunkier cuts. I also added organs in slowly. Too much can give them loose stools, so beware. Too much bone, and you'll get a constipating effect. I also originally used to feed them commercial raw, but it's expensive to continue to doing so, so I switched over to the PMR diet for the most part, to encourage chewing their meat for their dental health.
I use S&C's dinner (freeze dried) as toppers over their raw to get them to eat something new, too. It's expensive, but easy to use in a pinch, and can be reconstituted with water as meals if needed.