Seq

@datalust.co

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The self-hosted search, analysis, and alerting server built for structured logs and traces. Also available at https://social.datalust.co/@seq. 🇦🇺

Seq 2026.1 Metrics screen: a grid of metric charts showing the OpenTelemetry demo data set. Two of the charts are "pinned" to the top of the grid. Charts are grouped by resource and scope. Tool windows show an editor for the current view, and a list of metric dimensions.
Seq 2025.2 showing 1716 MB combined buffered and indexed events.
A screenshot of an alert notification "Health Check Failures" in Slack. The notification includes "Explore detected results and contributing events in Seq", a "Results" block with target URL, status code, and count, and a "Contributing Events" heading with two HTTP error log entries shown.
A screenshot of a line chart for Npgsql db.client.connection.npgsql.create_time.
The Seq Events screen showing the search expression @Elapsed > 1m.
Attendees and presenter in front of a slide titled "Column Oriented Database Internals"
Photograph of a busy lecture theater at DDD Brisbane with the presenter gesturing towards overhead slide projection.
A screenshot of the archived datalust/seq-forwarder repository on GitHub.
The Seq command palette, with "ran" typed in the filter box. The list shows the Custom Range, From Now, Next Range, Previous Range, and To Now shortcuts.
The Seq 2025.1 Events screen, in the "classic" light theme.
A Seq screenshot showing a heatmap of row counts over time.
The components responsible for tracking node state and orchestrating transitions. A consensus module interacts with the external cluster state database, feeding triggers into the node state machine. Simultaneously, a clock component fires triggers in the state machine too. The state machine sends commands to a command queue, which is observed by a command queue monitor. The command dispatcher pulls commands from the queue, and orchestrates the storage engine and application components.
The Seq Events screen, showing the command palette dialog as an overlay. The dialog comprises a search box and a list of matching commands. The search box has been filled with the word "signal", and the command list shows matches including "Add to Signal", "Clear All", "Exclude", "Save", and "Signals", each with help text. Beside the matching command names are the shortcut key sequences for each command, for example Add to Signal is Ctrl Space, A.
Sponsor logos on a poster at the event: Auth0, Bunnings Warehouse, Elastic, Particular Software, REA Group, SafeStack, Seq, TinaCMS, YakShaver