SUM - Secure Ultimate Messenger Alternatives

LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...

Open Source

You can message and share files inside your intranet without a server.

VoIPstudio is an award-winning VoIP system that offers businesses of all sizes a scalable communication solution. It’s inexpensive, easy-to-use, offers a full suite of PBX features, and is fully integrated for CRM.

Try for free paid Free Trial $4.99 / Monthly (User)

Squiggle is a free and open-source, peer-to-peer LAN messenger that is lightweight and feature-rich.

IP Messenger (Official Site)

Secure instant messenger for any network

freemium $6.0 / One-off (per user)

BORGChat is a LAN messaging software program.

Winpopup LAN Messenger is a cost-effective Office, Corporate, Enterprise Instant Messaging solution.

Share files offline. No servers. No cloud. No limits.

WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.

free

LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.

Secure instant messenger app for office provides seamless instant messaging solutions for all office, corporate and enterprise business communication needs.

SHAREit allows you to transfer files and data from your phone to another device without having to rely on WiFi or a data plan.

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