Coop provides cross-platform Nostr messaging with a client for chatting privately.
Open source
24 alternativesDenny
Denny focuses on encrypted group chats in a Nostr-based instant messaging client.
About Denny
Denny is an open-source Nostr-based instant messaging client focused on encrypted group chats, designed with a simple, elegant, and secure user interface. It operates as a web application and also has a separate desktop app available for download. Users can access a publicly hosted version of Denny, or self-host the service by downloading a release tarball, serving the app's dist directory with a web server, or using official Docker images. A customized config.json can be placed in the webroot to set a default homeserver for login and registration pages.
Key features
- Encrypted group chat via Nostr protocol
- Simple, modern, secure user interface
- Publicly hosted web application available
- Self-hosting support via tarball or Docker
- Customizable default homeserver configuration
- Continuously deployed dev branch for testing
Best for: Users seeking an open-source, encrypted Nostr group chat client with a simple interface, including those who want to self-host the service.
Good for
- Open-source codebase allows public review and community contribution
- Primary focus on secure, encrypted group messaging
- Offers multiple deployment options including hosted, self-hosted, and desktop
Watch out for
- Continuously deployed dev branch may contain unstable or broken features
Denny at a glance
- Website
- github.com/denostr-lab/denny
- Category
- Social & Communities › Nostr
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Denny FAQ
Is Denny open source?
Yes, its full codebase is publicly available on GitHub for review and contribution.
Can I self-host Denny?
Yes, self-hosting is supported via release tarball, serving the dist directory with a web server, or using official Docker images.
Is a hosted version of Denny available?
Yes, a public web app is hosted at https://app.cinny.in, with a continuously updated dev branch at https://dev.cinny.in.
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