MDDHosting have done it! One of the few shared/reseller hosting providers who've managed to provide isolated (hence secure) Redis (and Memcached for that matter) instances to their customers on shared and reseller hosting plans.
MDDHosting KB article on the topic:
https://www.mddhosting.com/support/knowledgebase/1107/Enabling-or-Disabling-Memcached-or-Redis.html
Pretty neat. 🙂
Redis can help with WordPress WooCommerce e-shop websites. For "ordinary" sites (including the dynamic WP ones) it is not really important in my opinion and experience.