TrueConf Server is an on-premises corporate messenger with powerful video collaboration tools and webinar support. The solution is free for up to 1,000 lifetime users and also offers an enterprise edition tailored for large organizations, government institutions, and defense agencies. Deployed within LAN, it guarantees complete control over communications and access. Installation takes just 15 minutes on Windows or Linux. The platform ensures secure communication with a proprietary protocol and provides a user-friendly address book with presence statuses for colleagues. Its built-in corporate messenger supports peer-to-peer conversations, group chats, and channels in an instant messaging format, with file storage, mentions, chatbots, folders, archives, and favorites, keeping teamwork efficient and organized. Users can share files securely, search within channels and chat histories, and track full conversation history across devices. For meetings, TrueConf delivers 4K Ultra HD video conferencing and calls with up to 1,500 active participants and 49 on-screen video feeds. Cross-platform client applications for desktop and mobile systems ensure seamless access from anywhere. Integrated on-premises AI enhances user experience with smart tools such as meeting summaries, virtual backgrounds, noise suppression, face tracking, and real-time meeting management. TrueConf also features a flexible conference scheduler with moderation controls, automated invitations, waiting rooms, and support for both private and public meetings. Collaboration tools include screen and application sharing with annotations, slideshow support in multiple formats, remote desktop control, polling, meeting recording, and built-in media playback. Available 24/7, TrueConf keeps communication consistent across devices with full chat and draft synchronization. Its SDK and API toolkit enable automation, customization, and integration with chatbots, other video conferencing solutions, or productivity apps, making it a scalable and adaptable choice for businesses that require reliable and secure communication.