This open-source project is run by Masland Tech LLC. Donations keep the crawler online and go to the project bank account through Stripe Checkout.
What is this?
🌐 What is Matrix?
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 or a domain-less room ID
server.org — a server domain (scrapes all its public rooms)
A matrix.to share link, including via= servers
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
Search history is being collected. The chart will appear after new search activity.
Page Visits — Last 3 Days
Visit history is being collected. The chart will appear after new page visits.
Promoted
No rooms promoted right now.
Top Active Rooms (Last 12h)
Loading top rooms...
Net Account Change (Last 12h)
Loading account changes...
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.