Semaphor
Zero Knowledge, end-to-end encrypted collaboration tool for teams and businesses. Reviewable source code. Python wrapper for bots & integrations. Encryption white pa...
- Freemium • Open Source
- Group Chat App
- Team Collaboration Tool
- Instant Messenger
- Mac
- Windows
- Linux
- Android
- iPhone
What is Semaphor?
The SpiderOak team needed a secure solution for group messaging and file sharing without the risks of email or off-the-shelf collaboration tools. We made Semaphor, group messaging with private blockchain encryption. Now your company or team can protect your most important communication with the same No Knowledge application we use at SpiderOak.
Semaphor gives you secure group messaging for your most sensitive data. End-to-end encryption with private blockchain technology protects your private company communication and your everyday work.
Our No Knowledge philosophy is the cornerstone of everything SpiderOak does. Your data in Semaphor is protected by private blockchain technology and end-to-end encryption. This means that all data is encrypted before it leaves your device and no data is visible or accessible to any SpiderOak employees. Only the members of your team have access to your data.
Semaphor 2.0 has been completely redesigned for usability and simplicity. Create teams and channels, send messages and files, all within an easy to use interface. Semaphor's mobile first design gives you full functionality no matter which of your devices you access it from.
Download and install Semaphor on all of your computers and mobile devices. Supported platforms include Windows, macOS, Linux (beta), iOS, and Android.
With something as important as your security and data at stake, you need the ability to verify how our products work.
Semaphor is free for teams of 5 or less. All teams include unlimited message and file retention, unlimited file sharing, a single file size limit of 2 GB, and unlimited channels and messages.
Semaphor Screenshots
Semaphor Features
Semaphor information
Comments and Reviews
Tags
- File Sharing
- collaboration
- secure-messaging
- Encryption
- Task Management
- Chat Rooms
- team-communication
- security-utilities
- Group Chat
- Chat Clients
Recent user activities on Semaphor
imsebi added 
danieltrafford added Semaphor as alternative(s) to Engage Spaces
gnemtsov added Semaphor as alternative(s) to AB-TASK
Daily Dot has a nice review of Semaphor (and Wickr Professional) as a secure Slack alternative - http://www.dailydot.com/layer8/best-slack-alternatives-secure-encryption/
Like for this app!
End-to-end encrypted chat, free for teams of 5 or less
Semaphor are doing a good thing: building a Slack-type app that allows private communication for teams, built around zero-knowledge encryption. Semaphor's owners, SpiderOak, can't see user data, give it away or lose it in readable format to hackers or government agencies.
That said, apps like Stackfield and Peerio aim for the same goal and are a little bit ahead in terms of the functionality their products offer. Peerio offers a team of up to 10 on their free plan, Stackfield has calendaring and other bells and whilstles.
Overall though, I'm happy Semaphor exists. I hope it develops quickly and, more importantly, that people realise that there is a serious privacy and security problem with apps like Slack, which do not respect their users enough to offer end-to-end encrypted communication.