Quicksy – Jabber with phone number verification and contact discovery

In plain words

Quicksy is a mobile messaging app based on the open-source Jabber/XMPP protocol that lets users sign up with their phone number and automatically discover contacts from their address book who also use the service. It functions as a full Jabber client, enabling communication with users on any public Jabber server, not just Quicksy users. Available for free on iOS and Android, Quicksy's source code is open source and available on Codeberg and Github.

written from the facts on this page · September 2026

From the sources

Quicksy is a spin-off of the popular Jabber/XMPP clients Conversations and Monal with automatic contact discovery. You sign up with your phone number and Quicksy will automatically—based on the phone numbers in your address book—suggest possible contacts to you.¹ Quicksy can be downloaded for free from Google Play or the App Store . The source code is Open Source and available on Codeberg (Android) and Github (iOS) . Under the hood Quicksy is a full-fledged Jabber client that lets you communicate with any user on any publicly federating server. Likewise users on Quicksy can be contacted from the outside simply by adding [email protected] to your contact list. Aside from the contact…from quicksy.im

• 
  Beeper Mini – iMessage client for Android2023 · beeper.com · ▲1,521

  Hi HN! I’m proud to share that we have built a real 3rd party iMessage client for Android. We did it by reverse engineering the iMessage protocol and encryption system. It's available to download today (no waitlist): https://play.google.com/store/apps/details?id=com.beeper.ima and there's a technical writeup here: https://blog.beeper.com/p/how-beeper-mini-works. Unlike every other attempt to build an iMessage app for Android (including our first gen app), Beeper Mini does not use a Mac server relay in the cloud. The app connects directly to Apple…

• 
  JMP2023 · jmp.chat · ▲136

  Boundaries for your phone number, not for you

• 
  AnonymSMS2022 · anonymsms.com · ▲275

  Temporary phone number for online verification

• 
  MailDump2018 · maildump.co · ▲270

  Find, extract and verify emails automatically

• 
  WhatsApp MCP Server2025 · github.com · ▲229

  Hi HN – I built an open-source, self-hosted Model Context Protocol (MCP) server for WhatsApp: https://github.com/lharries/whatsapp-mcp It connects to your personal WhatsApp account via the WhatsApp Web multi-device API (using whatsmeow from the Beeper team), and doesn't rely on third-party APIs. All messages are stored locally in SQLite. Nothing is sent to the cloud unless you explicitly allow your LLM to access the data via tools – so you maintain full control and privacy. The MCP server can: - Search your messages, contacts, and groups - Send WhatsApp messages to…

• 
  VerifyKit2022 · verifykit.com · ▲175

  Verify your users faster and cheaper than ever

• 
  SimCity, but with Permits▲936

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 3d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 16d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 17d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 10d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 14d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 24d ago · space.bl2.net

• 
  Krisp Mac▲893

  Record outgoing calls and get transcripts + AI notes

  AI · 2018 · krisp.ai

• 
  Web.dev by Google▲815

  Learn how to build for the web and see where you stand 🌟

  Dev tools · 2018 · web.dev

• 
  DrawKit▲765

  MIT licensed SVG illustrations, in 2 styles

  Dev tools · 2018

• 
  The 1.1.1.1 App▲689

  Faster, more private internet by Cloudflare, now on mobile

  Work · 2018 · apps.apple.com

• 
  TabNine, an autocompleter for all languages▲607

  Tabnine is the AI code assistant that accelerates and simplifies software development while keeping your code private, secure, and compliant.

  AI · 2018 · tabnine.com

• 
  1Kprojects▲585

  Neglected side projects for less than $1000.

  Dev tools · 2018 · indiemaker.com