There are lots of resources available online which you can use to research cruelty free and vegan brands / products. Even a quick Google search for ‘[brand name] vegan’ will give you some results to work through. Always look for the most up to date information as ingredients lists and policies do change.
To make life a bit easier for you (and me!) I have compiled a list of resources that I trust as well as a list of haircare brands that are cruelty free and have vegan products available.