No, I don’t believe so although @The Daniel 🖖 might know. Most Nostr clients use relay subscriptions while primal uses a caching server which acts as an intermediary between Nostr relays and the client.

Thanks for explanation 🤙🏼

Wisp uses the opposite system - outbox model. That means we automatically connect to all the relays the people you follow use to build your feed. This is the most decentralized and censorship resistant way to implement nostr in a client.