We’ve reached a major milestone with Semaphor version 2.0.0. Since our last major public release in June 2017, everything about Semaphor has been examined, improved, and polished. A huge part of this process has been the feedback we received from Semaphor users. Your feedback, suggestions, and reports make a huge difference to our team. Please don’t ever hesitate to reach out to us through support.spideroak.com, @SpiderOak on Twitter or on Facebook at facebook.com/SpiderOak.

The first thing you’ll notice when you download Semaphor is the redesigned UI. Our design team has done amazing work to take the original vision of Semaphor and bring it to life through the new UI and UX. We hope you’ll enjoy using it as much as we do. (The entire SpiderOak team uses Semaphor for all of our team communications and we love the new look and feel!)


  • Redesigned UI
  • UX improvements
  • Message enumeration improvements
  • Scrolling improvements


  • Various bug fixes
  • Enhanced error messaging
  • Removed username signup

New Features

  • Added mobile landscape support

Installer Hashes (SHA256):

macOS: a1d2283b2f47ae923afefdd1caf738395e70e5376494c5d1689b8f267dc2a0cf

Linux DEB x64: dc86e96e4d6148f9e320d396ff25cb9291d582edd768bc8bdc706c454ffafa26

Linux RPM x64: 321a9e55e88e1e67e957ec066508ac3d9ed436dcfc72079b3a4d5887b66b2c94

Windows x64: add123bcc1d390c446bfd488c9b48d8c28084895fd3bd267f756c6f0863caf47

Windows x86: c3f5bcb5345f019a8976f3a5f0a4dfe0cdb3c0defb4a14702568a12db7841c2f