None right now that I'm aware of, though you can use the web apps like iris.to or nostr.social in Tor browser.

are there any clients or relays that use Tor/I2P or other ways of communicating without IP ?

02ad8239c2

 mentioned, IP addresses aren't stored as a part of the protocol, but they can be collected by relays and clients on the network if they desire.

Never too late to take steps to protect your privacy :)

nostr

Privacy on Nostr, a guide

sethforprivacy

As @sea_monster mentioned, IP addresses aren't stored as a part of the protocol, but they can be collected by relays and clients on the network if they desire.

Never too late to take steps to protect your privacy :)