Since Waku is built on top of libp2p, they share a lot of concepts and terminologies between them. However, there are key differences between them that are worth noting.
Waku intends to incentivize mechanisms to run nodes, but it's not part of libp2p's scope. Additionally, users or developers do not have to deploy their infra as a prerequisite to use Waku. It is a service network.
Waku includes various protocols covering the following domains: privacy preservation, censorship resistance, and platform agnosticism, allowing it to run on any platform or environment.
libp2p does not provide out-of-the-box protocols to enable mostly offline/resource-restricted devices, [Waku Store](/overview/concepts/protocols#waku-store)/[Waku Light Push](/overview/concepts/protocols#waku-light-push)/[Waku Filter](/overview/concepts/protocols#waku-filter) caters to those use cases.
libp2p does not have strong spam protection guarantees, [RLN (Rate Limit Nullifier)](/overview/concepts/protocols#waku-rln-relay) is a protocol being developed by the Waku team towards this goal.