Rocket.Chat

Rocket.Chat is a secure and highly customizable communication platform for teams and organizations needing robust security and control over their data.

Screego is an Open Source screen sharing application for developers that prioritizes high quality, low latency, and easy installation.

Sendent is a software platform that integrates Microsoft tools with Nextcloud to provide secure, private collaboration and data management without disrupting user workflows.

seven

seven is a reliable and easy-to-use business messaging gateway offering SMS sending and receiving solutions via API, web app, email, and direct app integration.

SFTPGo

SFTPGo is a modern, secure, and highly configurable file transfer server with a user-friendly web interface supporting various protocols and storage backends.

SICS-PC

Abilian SICS-PC is a secure collaborative information system for competitiveness clusters, facilitating communication, project management, and relationship management within the ecosystem.

SIP Thor

SIP Thor is a turnkey platform providing real-time audio, video, chat, file transfer, and presence services based on SIP and related protocols.

SMS.to is a versatile platform offering bulk SMS, SMS marketing, and SMS API services for enhanced customer communication.

smstools

Smstools offers a reliable and easy-to-integrate SMS gateway API for sending and receiving SMS messages worldwide, with features like webhooks and integrations with popular services.

Soapbox

Soapbox is a customizable and user-friendly social media platform built for the fediverse.

SOGo

SOGo is a scalable, Open Source groupware server providing a unified interface for email, calendar, and contact management.

SoGo Open Source

SOGo is a free and Open Source groupware server providing a scalable and secure webmail solution for businesses and communities.

Spacedeck is a freeand Open Source, web-based, real-time collaborative whiteboard application with rich media support.

Sparks Team is a European, GDPR-compliant alternative to Microsoft Teams offering digital sovereignty, flexible deployment, and seamless integration with existing office tools.

Spreed

Spreed is a secure, browser-based platform for high-quality video conferencing, team collaboration, and online training.

Stackspin

Stackspin is an Open Source platform providing a secure and easy-to-manage suite of collaborative apps for value-driven teams.

Sylk Suite is an Open Source, real-time communications platform for building custom multimedia applications accessible via SIP, XMPP, and WebRTC.

Sympa

Sympa is Open Source mailing list management software that simplifies communication and collaboration.

Sync-in is an open-source file storage, sharing, and collaboration platform that prioritizes data sovereignty, security, and user control.

Tableaunoir is an online collaborative blackboard with interactive fridge magnets for teaching, presentations, and animation creation.

Teamwire is a secure, GDPR-compliant business messenger for critical communication in sectors like public safety, healthcare, and government, offering fail-safe messaging, video calls, and emergency features.

Threema Broadcast

Threema Broadcast is a secure web application for efficient one-to-many communication via instant messaging, offering features like messenger newsletters, chatbots, and centrally managed groups.

ThreemaEducation

Threema Education offers a secure, private, and affordable instant messaging solution for schools and universities, facilitating efficient communication while protecting student and teacher data.

Threema Gateway enables secure and versatile messaging integration with your software, offering a superior alternative to SMS.