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Dev tools · alternatives · 2026

24 alternatives to Flux, a tiny protocol that rethinks email from the ground up

Hi HN, I have been experimenting with a messaging protocol called FLUX. The goal is to explore what email might look like if it was designed today instead of in the 1980s. FLUX tries to simplify a few things that feel complicated in the current email stack. Identity is based on cryptographic keys instead of usernames and passwords. Messages are signed and verified automatically. The transport is real time and does not depend on the traditional SMTP relay model. The current implementation is small and meant as a prototype. The whole server is only a few hundred lines of Python so the protocol…

Flux is a messaging protocol designed as a modern alternative to email. It uses cryptographic keys for identity instead of usernames and passwords, automatically signs and verifies messages, and employs real-time… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1
    Flux▲375

    how can we make AI agents more accessible? it has been a crazy journey seeing how AI agents gets smarter every single day but interaction layer is still missing we are launching Spectrum TODAY: one Unified API connect your AI Agents into iMessage, WhatsApp, Telegram and more

    Jan 2026 · photon.codes · its alternatives →

  2. 2
    Fluxer▲154

    Hey HN, and happy new year! I'm Hampus Kraft [1], a 22-year-old software developer nearing completion of my BSc in Computer Engineering at KTH Royal Institute of Technology in Sweden. I've been working on Fluxer on and off for about 5 years, but recently decided to work on it full-time and see how far it could take me. Fluxer is an open source [2] communication platform for friends, groups, and communities (text, voice, and video). It aims for "modern chat app" feature coverage with a familiar UX, while being developed in the open and staying FOSS (AGPLv3). The codebase is largely written in…

    Jan 2026 · fluxer.app · its alternatives →

  3. 3
    Flux▲250

    ChatGPT for hardware

    2023 · flux.ai · its alternatives →

  4. 4
    Integral ▲760

    i've been a power user of slack/discord and etc. since i was a kid and i dont like the fact that they get unusable/noisy after 20 members join. so i designed integral to get rid of the 2 biggest causes of noise on slack/discord and similar apps: 1. channels 2. recency based feed i've replaced these 2 with a few subtle features (different approaches for business vs communities). check it out and let me know what you think :)

    2024 · integralhq.com · its alternatives →

  5. 5SD

    Social networking over static sites

    Mar 2026 · satproto.org · its alternatives →

  6. 6

    Hey everyone, I made this thing: https://tryflux.ai/. Here's a demo video: https://screen.studio/share/1y2EnC26 Context: I've tried probably 15 different AI apps over the past year. ChatGPT, note-taking apps, productivity apps, all of it. But most of them are just clutter on my iphone. They live in some app I have to deliberately open. And I just... don't. But you know what I open 50 times a day without thinking? iMessage. So out of mild frustration with the "AI app graveyard" on my phone, I built Flux. What it does: - You describe a personality and what…

    Jan 2026 · tryflux.ai · its alternatives →

  7. 7

    AI email inbox and assistant

    Jun 2026 · fluxmail.ai · its alternatives →

  8. 8

    Hi everyone, I recently published a small open-source project. It’s a minimal network packet analyzer written in Go — designed more like a learning toy than a replacement for Wireshark. It currently supports parsing basic protocols like TLS, DNS, and HTTP, and includes a tiny fuzzing engine to test payload responses. You can inspect raw packet content directly from the terminal. The output is colored for readability, and the code structure is kept simple and clear. The entire program is very small — just about 400 lines of Go code. I know it’s not anywhere near Wireshark’s level, and I still…

    2025 · github.com · its alternatives →

  9. 9

    📡 An AX.25 packet radio chat protocol with support for digital signatures and binary compression. Like IRC over radio waves. - brannondorsey/chattervox

    2018 · github.com · its alternatives →

  10. 10

    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 →

  11. 11DP
  12. 12
    Flux▲2

    A highly scalable open market protocol

    2020 · its alternatives →

  13. 13

    A fast SOCKS5 proxy that tunnels your traffic through what looks like normal SMTP email, bypassing Deep Packet Inspection firewalls. How it works: - Client runs a local SOCKS5 proxy (127.0.0.1:1080) - Traffic is sent to server disguised as SMTP (EHLO, STARTTLS, AUTH) - DPI sees legitimate email session, not a VPN/proxy Features: - One-liner install on any Linux VPS - Multi-user with per-user secrets and IP whitelists - Auto-generated client packages (just double-click to run) - Auto-reconnect on connection loss - Works with any app that supports SOCKS5 Tech: Python/asyncio, TLS…

    Jan 2026 · github.com · its alternatives →

  14. 14

    Contribute to cmc-labo/flux development by creating an account on GitHub.

    Jan 2026 · github.com · its alternatives →

  15. 15

    Learn Flux from an extremely simple demo. Contribute to ruanyf/extremely-simple-flux-demo development by creating an account on GitHub.

    2016 · github.com · its alternatives →

  16. 16
  17. 17
    Flux▲4

    Team chat with an extension marketplace and desktop app.

    Mar 2026 · getflux.org · its alternatives →

  18. 18

    Postman alternative

    May 2026 · reqit.vercel.app · its alternatives →

  19. 19

    I built https://stringflux.io/ to make everyday string transformations a little less painful. It’s similar to CyberChef in the sense that it supports multiple string operations, but with a cleaner, more focused UI and smart suggestions based on your input. You can also chain transformations — for example: decode base64 string which was base64 encoded from minified json → then json format (pretty-print) it — all in one flow. This is helpful when dealing with complex or nested strings, like encoded API responses or log data, where you need to apply multiple steps to make the…

    2025 · stringflux.io · its alternatives →

  20. 20

    Hi HN :) really excited to share this with you. The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels…

    Jul 2026 · captchainbox.com · its alternatives →

  21. 21

    One AI agent. Every channel. Zero missed messages.

    Jul 2026 · cx-flux.com · its alternatives →

  22. 22

    This is a community forum for people who use, build, and run things on Nostr. Whether you are taking your first steps with keys and zaps, ship relays and clien…

    23d ago · nostr-proto.org · its alternatives →

  23. 23
    FLUX.2▲12

    Generates high-quality AI images with character consistency

    Nov 2025 · docs.bfl.ai · its alternatives →

  24. 24

    I am happy to announce Stalwart SMTP [1], a modern SMTP server developed in Rust with a focus on security, speed, and extensive configurability. It features built-in DMARC, DKIM, SPF and ARC support for message authentication, strong transport security through DANE, MTA-STS and SMTP TLS reporting, and offers great flexibility and customization thanks to its dynamic configuration rules and native support for Sieve scripts. The project has been recently awarded a grant from NLNet and the European Commission's Next Generation Internet program to develop a mail server in Rust. The next step in…

    2023 · 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 →