Caliopen is a messaging platform designed to facilitate discussions with your contacts while preserving your privacy. It aims to provide a secure and private communication solution for users. The platform allows users to engage in conversations with their contacts, ensuring that their personal information and communication remain private. As an open-source project, Caliopen offers transparency and the ability to audit the codebase for security and privacy. Please note that Caliopen is currently in alpha testing and not yet ready for production use.
Key Features
  • Secure and Private Communication: Caliopen prioritizes user privacy by providing a secure communication environment for discussions with contacts.
  • Open-Source Project: Caliopen is an open-source project, allowing users to audit the codebase for security and privacy.
  • Transparent Development Process: The project is committed to transparency and encourages community engagement through issue tracking, feature requests, and pull requests.
  • Intuitive User Interface: Caliopen offers an intuitive user interface, making it easy for users to navigate and communicate with their contacts.
  • Community Engagement: Users can provide feedback and participate in the development process through various channels, including discourse, Twitter, and IRC.
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  • Infrastructure Cost Only: Our pricing structure focuses solely on infrastructure costs, with the software provided free of charge. view pricing
  • Up to 90% Cheaper than Commercial Apps: Enjoy significant savings with our platform, offering costs that can be up to 90% lower than traditional commercial applications.
  • Non-Linear Scaling: Unlike many solutions, our pricing doesn't scale linearly with the number of users, providing cost efficiency even as your user base grows.
Semut Advantage


Our platform seamlessly scales with your app needs for uninterrupted growth.


Centralized management in our platform optimizes spending on apps.

High availability

We prioritize continuous access to vital apps, even during disruptions.

Data sovereignty

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Kindly note that we do not offer support for modifying the open-source applications utilized in our platform. This is an open-source application, and any feature additions or removals should be directed to the community.
Frequently Asked Questions

Why bother with complicated installation processes when we have facilitated an effortless setup for you? Our platform already features a ready-to-launch app. All you need to do is click on 'install', and you're done! You can easily get started with our app with just one simple click.

Why go through the hassle of self-hosting when we already offer a ready-to-use app on our platform? All it takes is one click to install and voila, you're all set! You can easily launch the app with a single click, making your work far simpler

Caliopen serves as an open-source alternative to proprietary messaging platforms designed to provide secure and private communication.


Waitlist for Caliopen

Joining our waitlist lets us notify you the moment our app is available. We value your interest and your patience while we work on making this ready for you to use.

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Semut's products and technologies are protected or are in the process of being protected by patents in the U.S. and elsewhere. This disclosure is provided to satisfy the virtual patent marking provisions of Section 16 of the America Invents Act and to further serve as notice under 35 U.S.C. §287(a).