The best European alternative to Telegram is Matrix. If that doesn't suit you, we've compiled a ranked list of other European Telegram alternatives to help you find a suitable replacement. Other interesting alternative to Telegram is Fluxer.
Telegram alternatives are mainly Communication Tools but may also be Team Collaboration Platforms. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Telegram.
This list contains services from companies based in a member state of the European Union (EU), the European Economic Area (EEA) and the European Free Trade Association (EFTA). You can read more about the listing conditions here.
Matrix.org provides an open network protocol enabling secure, decentralized messaging and communication across platforms with end-to-end encryption.

Matrix.org offers a revolutionary approach to digital communication through its open protocol for secure, decentralized messaging. Unlike traditional messaging platforms, Matrix creates an open network where users maintain control over their data and communications.
The platform enables seamless communication across different applications and services, breaking down the silos that typically separate messaging platforms. Users can chat with friends, family, communities, and co-workers through a unified protocol that prioritizes privacy and security.
Key features include:
Matrix serves as both a communication platform and a development foundation for building advanced messaging applications. The protocol supports everything from simple text messaging to complex collaborative tools, making it ideal for communities, organizations, and developers seeking secure communication solutions.
The Matrix.org Foundation guides the protocol's development, ensuring it remains open, secure, and accessible to all users while fostering innovation in decentralized communication technology.
Open-source instant messaging platform from Sweden with VoIP, screen sharing, moderation tools, and self-hosting options. Built for friends and communities.

Fluxer is a free and open-source instant messaging and VoIP platform developed in Sweden, designed to put users first. Built for friends, groups, and communities, it offers a comprehensive communication solution without compromising on privacy or control.
Key Features:
Self-Hosting Capabilities: Run your own Fluxer instance with the fully open-source backend (AGPLv3 license). Connect using desktop clients with mobile apps coming soon, and easily switch between multiple instances.
Community-Driven Development: Fluxer is built transparently with community involvement through bug reporting, code contributions, and localization efforts. The platform offers bug bounty programs and maintains active communication channels for user feedback and feature discussions.