Signal Plugin License Key 〈2026〉

And if you’re like most engineers, your first question was: Wait, Signal is open source. Why is there a license key?

By The Dev Team | 4 min read

# Stop the signal service sudo systemctl stop signal-server echo "SIGNAL_PLUGIN_LICENSE=YOUR_KEY_HERE" >> /etc/signal-server/env Restart and verify sudo systemctl start signal-server signal-admin plugins --verify signal plugin license key

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