Matrix is an open standard for interoperable, decentralized, real-time communication. It allows you
to chat across different providers (like email) without being locked into a single platform.
Active Matrix Rooms crawls the Matrix federation to
discover public rooms and measure their real-time activity by counting messages only.
🔒 Privacy
We count messages to calculate activity rates. We do not read,
store, or index message content — only the number of messages in a time window.
📊 Activity Calculation
Every room is periodically checked by counting recent messages and calculating a
messages per hour rate. Message text is never read or stored — only the count.
This rate is smoothed over time to filter out spikes. Rooms are ranked primarily
by this activity rate, with member count as a tie-breaker.
🔍 Room Discovery
The system automatically crawls known Matrix servers every 5 minutes, viewing their
public room directories respectfully. New servers are discovered from room metadata.
➕ Missing a Room or Server?
Use the Add field in the header to manually add anything the crawler hasn't found
yet. You can enter:
#room-name:server.org — a room alias
!roomid:server.org — a room ID
server.org — a server domain (scrapes all its public rooms)
A matrix.to link — auto-detected and resolved
Batch Add
Paste up to 100 rooms, aliases, or servers — one per line.
Federation Activity — Last 3 Days
Overview
Total Servers
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Total Rooms
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Page Visits
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SEARCHES
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Activity data is being collected. The chart will appear after the first few crawl cycles.
4-point rolling average
Searches — Last 3 Days (Cumulative)
Search history is being collected. The chart will appear after new search activity.
Page Visits — Last 3 Days (Cumulative)
Visit history is being collected. The chart will appear after new page visits.
Top Active Rooms (Last 12h)
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Hourly Active Rooms
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Browse by Topic
Find active Matrix rooms by subject — sorted by real-time conversation, not member count. Activity is measured by counting messages only; content is never stored.