RePlaya: Self-hosted browser session replay with live tailing powered by S2 streams
By
shikhar
Hot, fresh, and worth queueing round the block for.
Summary
RePlaya is a self-hosted browser session replay tool built on S2 (stream storage). Each user session is stored as a single S2 stream, eliminating the need for separate databases, message buses, object stores, or search indexes. The key feature is live tailing — sessions can be replayed in real-time while the visitor is still on the page. It includes a recorder snippet for websites and supports filtering, exporting, and playback of both live and completed sessions.
Key quotes
· 3 pulledEach session is stored as one S2 stream, and that stream is the whole backend — there's no separate database, message bus, object store, or search index.
Because an S2 stream can be tailed as it's written, RePlaya can replay a session live, while the visitor is still on the page, as well as play back finished ones.
Add the recorder snippet to your site and sessions are stored as streams you can replay, live-tail, filter, and export.
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