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Dev tools · alternatives · 2026

24 alternatives to Danube Messaging

Open-source pub/sub and streaming platform.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.

  1. 1
    Franz▲877

    Franz combines WhatsApp, Slack, Telegram, Gmail, Outlook, and native Signal in one desktop app with AI summaries, workspaces, and privacy-conscious local features.

    2016 · meetfranz.com · its alternatives →

  2. 2
    Franz 5▲451

    One desktop app for (almost) all of your messaging apps

    2017 · its alternatives →

  3. 3

    Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬 - chatwoot/chatwoot

    2019 · github.com · its alternatives →

  4. 4

    A realtime server for the modern web

    2016 · deepstream.io · its alternatives →

  5. 5

    Bots that work everywhere

    2016 · its alternatives →

  6. 6

    A native messenger for every platform

    2020 · telegram.org · its alternatives →

  7. 7

    Build, code and ship in app messaging in a few hours

    2019 · getstream.io · its alternatives →

  8. 8

    Live streams, flexible forwarding, trending stickers & more

    2021 · telegram.org · its alternatives →

  9. 9

    Scalable open source pub/sub SDK with support for RPC, JWT authentication and Kubernetes — optimized for async/await

    2016 · socketcluster.io · its alternatives →

  10. 10

    hi there! i’ve been working on a project called Narwhal, and I wanted to share it with the community to get some valuable feedback. what is it? Narwhal is a lightweight Pub/Sub server and protocol designed specifically for edge applications. while there are great tools out there like NATS or MQTT, i wanted to build something that prioritizes customization and extensibility. my goal was to create a system where developers can easily adapt the routing logic or message handling pipeline to fit specific edge use cases, without fighting the server's defaults. why Rust? i chose Rust because i…

    Jan 2026 · github.com · its alternatives →

  11. 11
    Buzz▲161

    Your people, your agents, your project — all in one place

    Jul 2026 · buzz.xyz · its alternatives →

  12. 12

    Simple and scalable pub/sub message bus written in Erlang

    2015 · cabol.github.io · its alternatives →

  13. 13

    Client library for Minimal Chat. Contribute to minimalchat/client development by creating an account on GitHub.

    2017 · github.com · its alternatives →

  14. 14PD

    PicoMQ is a Rust server for Durable Streams, built on Object Store. Cheap, URL-addressable, granular streams (create/append/read/long-poll/SSE), with Pico Protocol or Durable Streams Protocol as the facade. S3Stream is the stream storage primitive, used in AutoMQ, shipped as a Rust library. Coordination is a command log in Postgres.

    Aug 2026 · picomq.com · its alternatives →

  15. 15

    🦭 Distributed log streaming engine built from first principles - nubskr/walrus

    Dec 2025 · github.com · its alternatives →

  16. 16

    Element is a digitally sovereign, secure and interoperable communications platform. Built on the Matrix open standard, it gives users the independence to control and manage their communications.

    2016 · vector.im · its alternatives →

  17. 17
    Flock▲168

    Real-time team messenger tool

    2016 · flock.com · its alternatives →

  18. 18

    Efficient and minimal collaborative code editor, self-hosted, no database required - ekzhang/rustpad

    2021 · github.com · its alternatives →

  19. 19
    RUSTWA▲36

    A Unofficial WhatsApp Web API built in Rust

    Jan 2026 · gitlab.com · its alternatives →

  20. 20

    This is a project I made to learn more about crypto. I've also written a [post](https://vaktibabat.github.io/posts/ecurvechat/) that explains all the crypto concepts and algorithms used in the project, and how I implemented them. I'd be very glad for any feedback about both the code and the post :)

    2024 · github.com · its alternatives →

  21. 21
  22. 22

    Hi HN, I'm Emilie, I have a literature background (which explains the well-written documentation!) and I've been learning Rust and distributed systems by building minikv over the past few months. It recently got featured in Programmez! magazine: https://www.programmez.com/actualites/minikv-un-key-value-st... minikv is an open-source, distributed storage engine built for learning, experimentation, and self-hosted setups. It combines a strongly-consistent key-value database (Raft), S3-compatible object storage, and basic multi-tenancy. Features/highlights: - Raft…

    Feb 2026 · github.com · its alternatives →

  23. 23

    An open source implementation and desktop client of the Threema Messenger App. - blizzard4591/openMittsu

    2016 · github.com · its alternatives →

  24. 24

    The safest and lightest forum, powered by rust. Contribute to freedit-org/freedit development by creating an account on GitHub.

    2022 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →