Murmelt Review

We recently spent time testing Murmelt, a free chat client for the Nostr network, and it did not take long for us to realize this is something genuinely different from the platforms we usually review. Murmelt is not another centralized chat service — it is a client, which means it connects you directly to the open Nostr protocol and the relays you choose. Our team went in curious, and came away genuinely impressed. 🙂

What Is Murmelt?

Murmelt is a free Nostr chat client that runs entirely in your browser. There is no app to install, no company in the middle, and no central server that stores your messages. When you open Murmelt, a cryptographic key pair is generated locally on your device — this key pair is your identity. No email, no phone number, no username, no password. This alone makes Murmelt one of the most privacy-respecting chat experiences we have tested.

The important thing to understand upfront is that Murmelt is a client, not a service. You are not signing up for a platform owned by a company. Instead, you are connecting to the open Nostr network, and Murmelt is simply the software you use to do it. The relays that route your messages are run by independent third parties, and you can switch them at any time. This is a fundamental difference from almost every other chat we have reviewed, and it changes how you should think about it.

Encrypted Private Messages & Group Chats

On the messaging side, Murmelt delivers everything you would expect from a modern chat client. Private one-on-one messages are end-to-end encrypted with NIP-17 before they ever leave your device. Only the recipient's public key can decrypt them, and the relays in between only ever see ciphertext. Group chats work the same way, so you can talk to several people at once without giving up the encryption model that makes Nostr attractive in the first place.

For us, the fact that group messaging is also encrypted is a big deal. Many platforms treat group chats as an afterthought or route them through less secure channels. Murmelt does not make that compromise, and that consistency is one of the reasons we rated it so highly.

Chat With Strangers — Decentralized Random Matching

The feature that makes Murmelt genuinely special is the chat with strangers. This is the part we had the most fun testing. When you open the Random tab, Murmelt broadcasts an anonymous, ephemeral signal to your Nostr relays saying you are looking for someone to talk to. When another user is doing the same thing at the same time, Murmelt pairs you up — and you are connected in an end-to-end encrypted chat with a stranger within seconds.

What makes this different from the typical stranger chat sites we review is that there is no central server deciding who you talk to. The matching happens over Nostr relays, the same open protocol that powers the rest of the app. There is no algorithm secretly steering you toward certain users, no company logging who you skipped and who you stayed with. It is just two strangers, matched in real time, talking in an encrypted channel that no one in the middle can read.

If a conversation is not working out, one tap on Skip and you are matched with a new stranger. Want to keep talking? Stay as long as you like. Chatting with strangers also supports peer-to-peer voice and video calls over WebRTC, with the media stream flowing directly between you and your match — never routed or recorded by Murmelt.

You Have To Choose Your Relays First

One thing worth mentioning: because Murmelt is a client and not a hosted service, you need to set your relays when you first start. Relays are the servers that carry Nostr messages, and which ones you pick affects who you can reach and how fast the chat feels. Murmelt makes this reasonably easy, but it is an extra step that mainstream chat users are not used to. We see this as part of the trade-off: you give up the convenience of a one-click hosted service and in return you get a chat that no single company can control, read, or shut down.

A Client, Not A Service — And That Matters

If there is one thing to take away from this review, it is that Murmelt is a client, not a typical chat service. There is no Murmelt server storing your conversations, no central database of user accounts, and no company that can change the rules on you overnight. You bring your own keys, you pick your own relays, and you stay in control. Relays and Blossom servers may have their own limits, but you can switch to different ones anytime at no cost.

For anyone who cares about digital self-determination, who is curious about Nostr, or who simply wants a free chat that respects their privacy by design, Murmelt is an easy recommendation. It feels honest, well-built, and refreshingly different from the centralized platforms we usually review.