GUPT

Anonymous, end-to-end encrypted messenger on Nostr with WebRTC calls.

messaging nostr privacy e2e-encrypted self-hosted docker webrtc chat pwa anonymous

Ports

Deps

Use Cases

Official Website View on GitHub View compose.yml

About

What GUPT does

GUPT is a self-hosted, anonymous, end-to-end encrypted messenger with no accounts required. Built on Nostr relays with WebRTC for voice and video calls, it supports encrypted media uploads, group rooms, offline caching, and ships as an installable PWA.

Install Flow

How to self-host GUPT

GUPT can be deployed with standard Docker Compose using the Yantr app catalog. This page collects the basic information searchers usually need first: what GUPT does, which Docker image Yantr uses, default ports, dependencies, and where to find the original compose template.

If you searched for GUPT Docker, GUPT Docker Compose, or self-host GUPT, this page is the direct landing page for that app in Yantr's catalog.

After deployment, Yantr also lets you publish additional ports later from the stack page using Docker-style syntax. Use mappings like 8080:8080 for a fixed host port or just 8080 to let Docker assign a random host port for container port 8080.

Use Cases

What people run it for

Chat anonymously with end-to-end encrypted direct messages without creating an account or providing personal information such as a phone number or email address.

Host private group rooms for your team or community over your own Nostr relays, keeping all messages encrypted and off centralised servers.

Make encrypted WebRTC voice and video calls directly from the browser without installing any native app.

Technical Details

Ports, image, and service metadata

Ports

These are the standard container ports Yantr knows about for GUPT. You can keep the default mapping, remap them, or publish extra ports later after deployment with Docker syntax such as 3000:3000 or 3000.