I got an email from blockchain.info some time ago that they supported the Bitcoin Cash chain. I haven't tried using the new feature, but I would trust them more than other webwallets. They have been around for more than six years, that's before Bitcoin really got 'hyped' and they're one of the only webwallets that allow you to manage your private keys/seeds. But if you want topnotch security and be responsible for your own coins than you should use a desktop wallet instead.