SilentSuite

What it does

End-to-end encrypted synchronization for your calendars, contacts and tasks. Integrates with your existing apps so you barely notice it’s there. Open source and zero-knowledge. Everything is encrypted on the client side and the server never has access to your data, even if compromised. Self-host for free or use the hosted service.

Open-source, zero-knowledge calendar, contact, and task sync. Plaintext stays off the server, and encryption keys stay on trusted devices.

End-to-end encrypted sync across web, Android, Apple Calendar, Thunderbird, and self-hosted servers. Everything is encrypted on your device before it syncs. Calendar events, tasks, and contacts stay useful on your devices. The server in the middle only sees changing ciphertext. A calendar invite, one phone number, and a recurring task can reveal more than a profile page. SilentSuite treats those records as private data by default. Most productivity clouds can turn calendars, contacts, and tasks into a profile of your habits, relationships, and intent. SilentSuite syncs encrypted records. The server gets ciphertext, not behavioral material. Big ecosystems make your planning data depend on…from silentsuite.io

• 
  EteSync – Secure and journaled sync for Android2017 · etesync.com · ▲41

  Secure, end-to-end encrypted, and privacy respecting sync for your contacts, calendars, tasks and notes.

• 
  Secure Calendar2019 · securecalendar.online · ▲75

  Privacy respecting calendar

• 
  Encryptochat2020 · play.google.com · ▲68

  True end-to-end encrypted messaging.

• 
  Tresorit 3.02016 · tresorit.com · ▲98

  End-to-end encrypted file sync & sharing for your team

• 
  Notte - Privacy-first WorkspaceJul 2026 · notte.com · ▲19

  Notes, tasks, calendar, and AI in one E2E encrypted app.

• 
  OI Calendar2019 · cal.openintents.org · ▲78

  Encrypted, decentralized alternative to Google calendar

• 
  /dev/null▲483

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲345

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

• TL
  The load-bearing vocabulary of Claude▲710

  Life & fun · Aug 2026 · louisabraham.github.io

• 
  Hey Noah▲656

  A proactive AI executive assistant for founders

  AI · Aug 2026 · heynoah.io

• 
  Clipto MCP▲655

  Hey HN, We recently built Clipto. It’s a tool that lets you search over terabytes of video, audio, and images on your computer, without relying on the cloud. Motivation: we probably all had this similar experience, we know a moment exists in a video or audio, but finding it takes hours scrubbing the timeline. You can send all the media to process in the cloud, but it’s slow, expensive and raises privacy concerns. So we decided to build our own on-device media search engine. How it works (high level): 1. We ingest video, audio, image; normalize formats via ffmpeg; run content analysis to…

  Work · Aug 2026 · clipto.com

• 
  Simple algorithm and color space to generate diverse skin tones▲627

  Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…

  Life & fun · Aug 2026 · toneyalexander.github.io

• 
  AdAnt AI▲620

  Claude for viral, high-converting social ads

  AI · Aug 2026 · adant.ai

• 
  Astute▲606

  Automate your B2B brand going viral, with new media creators

  AI · Aug 2026 · company-app.joinastute.com