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Best Messaging Software

Compare the Top Messaging Software as of October 2025

What is Messaging Software?

Messaging software enables users to send, receive, and manage instant text, voice, or multimedia communications across devices and platforms. It supports real-time conversations through one-on-one chats, group messages, and channels, often including features like file sharing, emojis, and read receipts. Many messaging tools integrate with email, calendars, and other productivity apps to streamline workflows and collaboration. With encryption and security measures, messaging software ensures that communications remain private and protected. Ultimately, it facilitates efficient and seamless communication for personal, team, or business use. Compare and read user reviews of the best Messaging software currently available using the table below. This list is updated regularly.

  • 1
    Mattermost

    Mattermost

    Mattermost

    Mattermost is a flexible, open source messaging platform that enables secure team collaboration. Build intuitive workflows and collaborate across large teams without worrying about security or data privacy. Get up and running quickly with hundreds of existing integrations, or build out custom workflows that scale to tens of thousands of concurrent users. Many of the world’s leading privacy-conscious enterprises work better with Mattermost by connecting people, tools, and automation to increase collaboration. DevOps teams use Mattermost to power collaboration at every stage of the DevOps lifecycle. Mattermost unifies people, tools, data, and automations to help your team increase innovation and agility. Mattermost is an open source Slack alternative. It's written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL. Use the features you like (file sharing, real-time group chat and webhooks—to name a few) and access the source code.
    Starting Price: $3.25 per user per month
  • 2
    FortKnoxster

    FortKnoxster

    FortKnoxster

    One-stop E2E encrypted platform made by cybersecurity experts. Crypto Suite™ is all you need in the jungle of crypto apps. The safest app available for all your crypto needs. All your valuable and private stuff in one secure place. Communications, cryptocurrencies and private files. End-to-end encryption and blockchain integration to ensure that only you are in control. We make it easy to handle your crypto. FortKnoxster is a true one-stop secure platform. Easy to share crypto and easy to invite your friends and contacts. The wallet in FortKnoxster is entirely non-custodial – only you have access to your funds. We don't have access - or anybody else. Only you hold the private encryption keys to your funds. Store all your coins and tokens in a single, secure mobile wallet. We support multiple blockchains and thousands of assets. BTC, ETH, FKX, ERC20, BEP20, NFT collectibles and other assets totally on your terms.
  • 3
    MsgSafe.io

    MsgSafe.io

    MsgSafe.io

    Instantly create as many email addresses as you need - each associated with their own group of contacts. Share addresses with anyone, but keep your real email address private. Stop telecom companies, governments, and hackers from seeing with whom you communicate. Each virtual mailbox is automatically set up with 4096-bit GPG and S/MIME encryption keys and certificates. All email stored at MsgSafe-io is encrypted. You can manage the encryption profile for each contact you communicate with. Protect your entire family or organization by managing all identities and email addresses with the domain you already own. If you don’t own a domain, you can use our domain registration services to purchase a domain integrated with MsgSafe-io and privacy protection. You don’t trust FaceTime, Skype, Duo, Hangouts and similar services hosted by companies like Apple, Microsoft and Google? Try our secure and private audio and video services. You can invite people to call you from a browser link.
    Starting Price: $5 per month
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