SUM - Secure Ultimate Messenger Alternatives

    SUM - Secure Ultimate Messenger is described as 'SUM is a simple secure desktop instant messenger for local networks. No server infrastructure is needed. All communication is encrypted and nothing saved on any server'. There are more than 10 alternatives to SUM - Secure Ultimate Messenger for a variety of platforms, including Windows, Mac, Linux, Android and Android Tablet. The best alternative is LAN Messenger, which is both free and Open Source. Other great apps like SUM - Secure Ultimate Messenger are Feem (Freemium), Squiggle (Free, Open Source), Winpopup LAN Messenger (Free Personal) and Lan Messenger (Free, Open Source).

    This page was last updated Oct 24, 2020

    1. LAN Messenger is a p2p chat application for intranet communication and does not require a server. A variety of handy features are supported including notifications, personal and group messaging with encryption, file transfer and message logging.
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      • FreemiumProprietary
      • Mac
      • Windows
      • Linux
      • Android
      • iPhone
      • Android Tablet
      • Windows Phone
      • iPad
      "Hi. My Name is Feem. I happen to be the best local file transfer app on Earth." Feem works like Bluetooth; but 50X faster. Feem sends files instantly from one device to another without passing through the Internet.
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      • FreeOpen Source
      • Windows
      Key Features: Server-less peer to peer LAN chat, No installation required. Just download, unzip and run Group chat, Broadcast chat and Private chat Bridge for connecting two LANs across subnets or WAN.
    2. Winpopup LAN Messenger is a cost-effective Office, Corporate, Enterprise Instant Messaging solution.
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      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      LAN Messenger is a decentralized UDP IM-style chat client which supports usernames, guaranteed-delivery IMs, broadcast chat, encryption, file transfer, simple UI, persistent settings, and IP blocking.

      Discontinued

      And almost as outdated as the original Lan Messenger. Last repo update from 2013.

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    3. BigAnt Office LAN Messenger offers rich features for secure and stable business communication.
      • Mac
      • Windows
      • Android
      • Android Tablet
      Is your company starting to experience communication problems? Does it take too much time to call your co-workers to invite them to a group meeting? Hate walking all over the building to solve some trivial issue?
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    4. Private and Secure Instant Messenger for Office designed specifically for keeping remote employees and multiple offices in sync. "Give your team the freedom to chat, talk, share and interact together from anywhere, on any devices" by using it.
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      • FreeProprietary
      • Windows
      AChat enables you to chat on your local network (LAN). But you can also share entire directories or send specific files, show images to other users and send messages even to users who are currently offline. Everything with full Unicode support.
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      • Mac
      • Windows
      • Android
      • Android Tablet
      Intra-office communication is essential to modern businesses; you need to be able to call your employees to meetings or update a project group quickly, easily and securely.
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    Showing 10 of 10 alternatives