Datalust, the company behind Seq

Seq is the intelligent search, analysis, and alerting server built specifically for modern structured log data.

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News and announcements

Announcing full support for ARM CPUs in Seq 2021.4

Tuesday, 21 December 2021

Seq 2021.4 has shipped! 🎉 Find downloads and container information at

We're committed to making Seq a joy to use wherever you develop. Since Apple's switch to Apple Silicon in M1 MacBook Pros, for many of us this means working on the

Sending Alerts to Slack

Wednesday, 24 November 2021

Seq can monitor the event stream and trigger alerts when configured conditions occur. For example, a system produce an alert when an item runs out of stock.

Alerts are useful because they can generate notifications. If I receive a notification that a product is out of stock I can take

Copying signals and dashboards using seqcli templates

Monday, 15 November 2021

Templates make it easy to copy entities like signals and dashboards from one Seq server to one or more others:

  • Between isolated dev, test, and production environments,
  • Through blog posts and support documentation, and
  • Between developers on a team.

(We're really excited about the last one, because keeping

New from Datalust

On .NET Live - Application logs and diagnostics with Serilog

Nicholas Blumhardt talks application diagnostics with Cecil Phillip in On .NET Live.

.NET Rocks! #1647 - Rust and C# with Ashley Mannix

Ashley Mannix talks with Carl and Richard about the combination of Rust and C# used at Datalust.

C# and Rust: Combining Managed and Unmanaged Code Without Sacrificing Safety, NDC Oslo 2019

Ashley Mannix explores the tools that .NET and Rust give us to design and build safe and robust hybrid applications.

Parsing in C# from First Principles, NDC Sydney 2018

Nicholas Blumhardt talks about Superpower, the library we built for parsing SQL queries in Seq, and the foundational principles behind it.

Open Source and the Future of Seq

Brendan Richards interviews Nicholas Blumhardt about Open Source, Rust, Seq, Serilog, and more, in this AMA from NDC Sydney 2018.

Using Structured Logging for Production Insight

Microsoft's Damian Brady and Nicholas Blumhardt talk structured logging in this episode of The DevOps Lab.

.NET Rocks! #1466 - The Evolution of Serilog

Richard Campbell, Carl Franklin, and Nicholas Blumhardt talk all things logging, diagnostics, and monitoring in this .NET Rocks! episode recorded at NDC Oslo 2017.

Serilog: Instrumentation that Works for You, NDC Oslo 2017

Nicholas Blumhardt presents a complete walk-through of Serilog and modern structured logging at NDC Oslo 2017.