Life & fun · alternatives · 2026

24 alternatives to Async.MQTT5, a C++20 MQTT client based on Boost.Asio

Async.MQTT5 is a professional, industrial-grade C++20 client built on Boost.Asio. This client is designed for publishing or receiving messages from an MQTT 5.0 compatible broker. Async.MQTT5 represents a comprehensive implementation of the MQTT 5.0 protocol standard, offering full support for publishing or receiving messages with QoS 0, 1, and 2. Our clear intention is to include the Async.MQTT5 library into Boost. We are actively working on it.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Async.MQTT5, a C++20 MQTT client based on Boost.Asio launched in 2023; newer entries below may have overtaken it.

1. 1
   Async▲633

   Replace "quick” work calls with supercharged voice messages

   2023 · async.com · its alternatives →

2. 2
   WebRTC implementation for Python using Asyncio▲216

   WebRTC and ORTC implementation for Python using asyncio - jlaine/aiortc

   2018 · github.com · its alternatives →

3. 3
   Async UI: A Rust UI Library Where Everything is a Future▲173

   2022 · wishawa.github.io · its alternatives →

4. 4
   Bi-directional sync between Postgres and SQLite▲356

   Hi HN, Today we’re launching PowerSync, a Postgres<>SQLite bi-directional sync engine that enables an offline-first app architecture. It currently supports Flutter, React Native and web (JavaScript) using Wasm SQLite in the browser, with more client SDKs on the way. Conrad and I (Ralf) have been working on our sync engine since 2009, originally as part of a full-stack app platform. That version of the system is still used in production worldwide and we’ve learnt a lot from its use cases and scaling. About a year ago we started on spinning off PowerSync as a standalone product that is…

   2023 · powersync.com · its alternatives →

5. 5
   HTTP/2 Python-Asyncio Web Microframework▲173

   2018 · gitlab.com · its alternatives →

6. 6
   Twist 2.0▲291

   For teams burnt out by real-time chat, work async, not ASAP

   2021 · twist.com · its alternatives →

7. 7
   µTT – A new faster MQTT broker▲115

   2017 · github.com · its alternatives →

8. 8
   Asynchronous HTTP/2 client for Python 2.7▲94

   Tornado HTTP/2 Client. Contribute to vladmunteanu/th2c development by creating an account on GitHub.

   2018 · github.com · its alternatives →

9. 9
   ASObot▲383

   No subscription ASO tool in Slack & Telegram messengers

   2023 · asobot.pro · its alternatives →

10. 10
    Pure C Asynchronous HTTP Framework▲80

    Asynchronous C networking library with HTTP server, WebSockets, reverse proxy, HTTP/2 gRPC client, TLS and event loop. - Softmotions/iwnet

    2022 · github.com · its alternatives →

11. 11
    Whirlwind – Async concurrent hashmap for Rust▲140

    Hey HN, this is Will and David from Fortress (https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=41426998). We use a lot of async Rust internally, and created this library out of a need for an async-aware concurrent hashmap since there weren’t many available in the Rust ecosystem. Whirlwind is a sharded HashMap with a fully asynchronous API. Just as dashmap is a replacement for std::sync::RwLock, whirlwind aims to be a replacement for tokio::sync::RwLock. It has a similar design and performance characteristics to dashmap, but seems to perform better in read-heavy workloads with tokio's…

    2024 · github.com · its alternatives →

12. 12
    asyncmcp – Run MCP over async transport via AWS SNS+SQS▲35

    Async transport layers for MCP. Contribute to bh-rat/asyncmcp development by creating an account on GitHub.

    2025 · github.com · its alternatives →

13. 13
    Redesk Beta▲200

    Async-first messaging app with goals, deadlines and upvotes.

    2020 · its alternatives →

14. 14
    WasmGPT – “ChatGPT” in the browser, no WebGPU and no server needed▲185

    Using threaded emscripten to speed up the generation and offload the main loop. No SIMD or other optimizations. Might work faster with #enable-experimental-webassembly-features enabled. Tested in x86 Chrome and Firefox, Apple Silicon Safari Run it yourself: https:&#x2F;&#x2F;github.com&#x2F;lxe&#x2F;ggml&#x2F;tree&#x2F;wasm-demo Thanks, https:&#x2F;&#x2F;github.com&#x2F;ggerganov&#x2F;ggml,

    2023 · lxe.co · its alternatives →

15. 15
    Async – Claude code and Linear and GitHub PRs in one opinionated tool▲107

    Hi, I’m Mikkel and I’m building Async, an open-sourced developer tool that combines AI coding with task management and code review. What Async does: - Automatically researches coding tasks, asks clarifying questions, then executes code changes in the cloud - Breaks work into reviewable subtasks with stack diffs for easier code review - Handles the full workflow from issue to merged PR without leaving the app Demo here: https:&#x2F;&#x2F;youtu.be&#x2F;98k42b8GF4s?si=Azf3FIWAbpsXxk3_ I’ve been working as a developer for over a decade now. I’ve tried all sorts of AI tools out there including…

    2025 · github.com · its alternatives →

16. 16
    Wait.chat▲84

    Deadline-aware message inbox for async teams

    2020 · expireddomains.com · its alternatives →

17. 17
    Oxyde – Pydantic-native async ORM with a Rust core▲155

    Hi HN! I built Oxyde because I was tired of duplicating my models. If you use FastAPI, you know the drill. You define Pydantic models for your API, then define separate ORM models for your database, then write converters between them. SQLModel tries to fix this but it's still SQLAlchemy underneath. Tortoise gives you a nice Django-style API but its own model system. Django ORM is great but welded to the framework. I wanted something simple: your Pydantic model IS your database model. One class, full validation on input and output, native type hints, zero duplication. The query API is…

    Mar 2026 · github.com · its alternatives →

18. 18
    BinaryRPC – Lightweight WebSocket-based RPC framework in modern C++▲78

    Hi HN, I’m a recent CS graduate. During the past few months I wrote BinaryRPC, an open-source RPC framework in modern C++20 focused on low-latency, binary WebSocket messaging. Why I built it * Wanted first-class session support, pluggable QoS levels and a simple middleware chain (global, specific, multi handler) without extra JSON&#x2F;XML parsing. * Easy developer experience A quick feature list * Binary WebSocket frames – minimal overhead * Built-in session layer (login &#x2F; reconnect &#x2F; heartbeat) * QoS1 &#x2F; QoS2 with automatic ACK & retry * Plugin system – rooms, msgpack, etc.…

    2025 · github.com · its alternatives →

19. 19
    Parallelise pipelines of Python async iterables▲71

    Utility function to parallelise pipelines of Python asyncio iterators/generators - michalc/asyncio-buffered-pipeline

    2020 · github.com · its alternatives →

20. 20TC
    Team – Coroutines and async semantics for C++▲35

    2014 · team.s4y.us · its alternatives →

21. 21
    Async Offsite-in-a-Box by Voodle▲92

    Your free toolkit to rethink offsites for distributed teams

    2021 · forestkey.com · its alternatives →

22. 22
    Mqtizer▲85

    Cross-platform MQTT client for industrial-grade IoT

    2023 · mqtizer.com · its alternatives →

23. 23
    Ascendio▲92

    Ascend a turborepo project in seconds

    2024 · ascendio.dev · its alternatives →

24. 24
    MQTT Studio▲87

    Build your own MQTT dashboard in minutes

    2023 · mqtt.studio · its alternatives →

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 →