Semaphor 2.0
Messaging secured by end-to-end encryption
Semaphor 2.0 launched on March 7, 2018 with 11 votes, #898 of 2,954 launches that month and more than 50% of that year's launches. The site was not reachable when checked in September 2026.
What it does
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.
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