sysend
The premium Open Source alternative to Pusher
🎯 Best for:Applications needing to sync state (like shopping carts) across multiple open tabs.
What is sysend?
A client-side alternative to Pusher or Socket.io for synchronizing data between browser tabs. It utilizes LocalStorage and BroadcastChannel APIs to enable zero-latency communication without a server.
Tech Stack
JavaScriptFrontend & Headless CMS
Why sysend?
- • No server required
- • Extremely lightweight
- • Privacy-focused (local data)
Limitations
- • Same-origin only
- • No cross-device sync
- • Browser API dependent
12/6/2025
Last Update
74
Forks
5
Issues
MIT
License
Financial Leak Detected
Stop the "SaaS Tax"
Your team could be burning cash. Switching to sysend instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on Pusher)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%