| 1 |  SignalSignal is an encrypted communications application. | 8.32.0 | Open source | October 20, 2026 | 284.4 MB | 3.4M ↓ |
| 2 |  DiscordYour Place to Talk and Hang Out | 1.0.9265 | Proprietary | October 22, 2026 | 145.7 MB | 882.4K ↓ |
| 3 |  Telegram DesktopA cloud-based mobile and desktop messaging app with a focus on security and speed. | 7.3.3 | Open source | October 22, 2026 | — | 1M ↓ |
| 4 |  SlackSlack brings the team together, wherever you are. | 4.52.182 | Proprietary | October 20, 2026 | 172.7 MB | 9.8M ↓ |
| 5 |  Rocket.ChatRocket.Chat is the leading open source team chat software solution. Free, unlimited and completely customizable with on-premises and SaaS cloud hosting. | 4.18.5 | Open source | October 23, 2026 | — | 973K ↓ |
| 6 |  ViberFree and secure calls and messages to anyone, anywhere. | 29.1.0.0 | Proprietary | October 14, 2026 | 149.6 MB | 259.3K ↓ |
| 7 |  ZulipDesktop client for Zulip, an open source team chat application. | 5.13.2 | Open source | September 27, 2026 | — | 97.4K ↓ |
| 8 |  PidginPidgin is a universal chat client, allowing you to consolidate all your different messaging apps into a single tool. | 2.14.14 | Open source | January 23, 2025 | 32.4 MB | 175.4K ↓ |
| 9 |  Zoom WorkplaceTeam Chat, Phone, Video & More | 7.2.48556 | Proprietary | September 21, 2026 | — | 64.6M ↓ |
| 10 |  SessionOnion routing based messenger | 1.18.2 | Open source | October 13, 2026 | — | 17.3K ↓ |
| 11 |  Microsoft Teams classicChat, Meetings, Calling, Collaboration | 1.8.00.27654 | Proprietary | October 14, 2025 | 167.2 MB | 52.5M ↓ |
| 12 |  CaprineCaprine is an elegant Facebook Messenger desktop app | 2.61.0 | Open source | January 13, 2026 | — | 18.1K ↓ |
| 13 |  Mumble (client)Low-latency and high quality voice chat primarily intended for use while gaming. | 1.5.915 | Open source | August 24, 2026 | — | 49.9K ↓ |
| 14 |  FerdiumMessaging app for WhatsApp, Slack, Telegram, HipChat, Hangouts and many many more. | 7.2.3 | Open source | September 8, 2026 | — | 44.8K ↓ |
| 15 |  Microsoft TeamsCollaborate more effectively with a faster, simpler, smarter, and more flexible Teams. | 26225.1806.5074.1452 | Proprietary | October 23, 2026 | — | 20.2M ↓ |
| 16 |  mIRCIRC (Internet Relay Chat) client | 7.83 | Proprietary | November 22, 2025 | 1 KB | 36.5K ↓ |
| 17 |  64Gram DesktopUnofficial Telegram Desktop | 1.2.10 | Open source | September 21, 2026 | — | 15K ↓ |
| 18 |  RetroShareRetroShare is a decentralized, private, secure, cross-platform, communication toolkit. | 0.6.7.2 | Open source | December 5, 2023 | — | 5.6K ↓ |
| 19 |  Jitsi MeetJitsi Meet is an open-source (Apache) WebRTC JavaScript application that uses Jitsi Videobridge to provide high quality, secure and scalable video conferences. | 2026.10.0 | Open source | October 21, 2026 | — | 32.9K ↓ |
| 20 |  HexChatAn IRC client based on XChat. | 2.16.2 | Open source | November 9, 2024 | — | 60.4K ↓ |
| 21 |  FranzA free messaging app for services like WhatsApp, Slack, Messenger and many more. | 5.11.0 | Open source | April 22, 2025 | — | 30.8K ↓ |
| 22 |  PsiInstant messaging as free and open as it should be. | 1.3 | Open source | April 14, 2025 | 84.0 MB | 3.2K ↓ |
| 23 |  ChattyChatty is a chat software specifically made for Twitch, in the spirit of a classic IRC Client. | 0.28 | Open source | March 9, 2026 | — | 29.4K ↓ |
| 24 |  Nicotine+Graphical client for the Soulseek peer-to-peer network | 3.3.11 | Open source | September 22, 2026 | — | 14.9K ↓ |
| 25 |  ChatterinoChat client for https://twitch.tv | 2.5.5 | Open source | March 22, 2026 | — | 18K ↓ |
| 26 |  WhalebirdAn Electron based Mastodon, Pleroma and Misskey client for Windows, Mac and Linux | 6.3.0 | Open source | May 6, 2026 | — | 7.5K ↓ |
| 27 |  LinphoneAn open source SIP phone for voice/video calls, instant messaging and conference calling. | 6.2.4 | Open source | October 22, 2026 | 111.9 MB | 231.8K ↓ |
| 28 |  GajimFully-featured XMPP client. | 2.4.7 | Open source | June 30, 2026 | 147.1 MB | 36.8K ↓ |
| 29 |  NhekoDesktop client for Matrix using Qt and C++20. | 0.12.0.35798 | Open source | June 2, 2025 | — | 9.6K ↓ |
| 30 |  DorionDorion is an alternative Discord client aimed towards lower-spec or storage-sensitive PCs that supports themes, plugins, and more! | 6.14.0 | Open source | October 19, 2026 | — | 2.6K ↓ |
| 31 |  ForkgramFork of Telegram Desktop messaging app. | 7.3.3 | Open source | October 22, 2026 | — | 4.4K ↓ |
| 32 |  JamiShare, freely and privately | 1.0.9197.28092 | Open source | March 8, 2025 | 134.3 MB | 47.1K ↓ |
| 33 |  qToxqTox is a chat, voice, video, and file transfer instant messaging client using the encrypted peer-to-peer Tox protocol | 1.18.5 | Open source | July 1, 2026 | — | 13.2K ↓ |
| 34 |  KakaoTalkLeading messenger service in South Korea. Chat and call anytime, anywhere, in real-time for free using KakaoTalk. | 26.9.0.5337 | Proprietary | October 21, 2026 | 92.3 MB | 16.6K ↓ |
| 35 |  WhatsappTrayExtension for the Whatsapp Desktop Client, that enables minimize-to-tray and close-to-tray functionality. | 1.9.0.0 | Open source | October 8, 2022 | — | 16.7K ↓ |
| 36 | 88x8 WorkAll your essential business communications brought together in one simple app. | 8.37.2 | Proprietary | September 8, 2026 | 254.4 MB | 363.9K ↓ |
| 37 |  HamsketFOSS messaging and emailing app that combines common web applications into one | 0.6.3 | Open source | March 7, 2022 | — | 3.3K ↓ |
| 38 |  RicochetRicochet is an experimental kind of instant messaging that does not trust anyone with your identity, your contact list, or your communications. | 1.1.4.0 | Proprietary | June 8, 2021 | — | 1.1K ↓ |
| 39 |  PatchworkA decentralized messaging and sharing app built on top of Secure Scuttlebutt (SSB). | 3.18.1 | Open source | June 2, 2021 | — | 1.2K ↓ |
| 40 |  Chatterino7Chat client for https://twitch.tv | 7.5.5 | Open source | August 18, 2026 | — | 3.7K ↓ |
| 41 |  BlueBubblesA cross-platform app ecosystem, bringing iMessage to Android, PC (Windows, Linux, & even macOS), and Web! | 1.15.7 | Open source | May 4, 2026 | — | 910 ↓ |
| 42 | RrabbitmqMessage-broker | 4.4.0 | Open source | | — | 663.2K ↓ |
| 43 |  QuaternionA Qt-based IM client for Matrix | 0.0.97.1 | Open source | April 4, 2025 | — | 2.4K ↓ |
| 44 |  Discord History TrackerExport discord chats | 47.4 | Open source | January 29, 2026 | — | 1.4K ↓ |
| 45 |  oatmealTerminal UI to chat with large language models (LLM) using backends such as Ollama, and direct integrations with your favourite editor like Neovim! | 0.13.0 | Open source | March 18, 2024 | — | 1.6K ↓ |
| 46 |  TheDeskTheDesk is a Mastodon client for PC. | 24.2.1 | Open source | February 14, 2025 | — | 4.5K ↓ |
| 47 |  IGdmDesktop application for Instagram DMs | 3.0.4 | Open source | April 19, 2022 | — | 862 ↓ |
| 48 |  CrewLinkFree, open, Among Us proximity voice chat | 2.0.1 | Proprietary | June 2, 2021 | — | 530 ↓ |
| 49 |  KVIrc IRC ClientIRC Client for Windows | 5.2.10 | Open source | March 31, 2026 | — | 2.2K ↓ |
| 50 | SSynology ChatA feature-rich desktop native client developed for Windows, MacOS, and Linux platforms, allowing you to enjoy the instant messaging service on your PC. | 1.2.4-235 | Proprietary | August 17, 2026 | 64.9 MB | 135.2K ↓ |