r/Klaviyo

Growing ecomm brand with around 35k profiles in Klaviyo. We’ve mostly been relying on Klaviyo’s native suppression and engagement-based smart sending. Deliverability has been okay but not great, so I’m wondering if there’s another layer we’re missing. I’ve seen some competitors talk about running external list cleaning on their Klaviyo databases, but I can’t tell if that’s actually useful or just overkill. Are we leaving performance on the table by sticking with what’s already built into Klaviyo?