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

Modeling expressions in Rust, from syntax to execution

Thursday, 28 July 2022

A behind-the-scenes look at the next version of Seq

Thanks to a round of Covid, and a very busy month, this second instalment in our series about Seq's upcoming dataflow-oriented query engine has taken a little longer than planned 😅. Thankfully, while we've been slow to

Structured logging from Node.js to Seq

Monday, 18 July 2022

The benefits of centralized, structured logging should be available to all technology stacks, which is why there are Seq clients for many different programming languages, including Python, Java and JavaScript (Node.js).

For Node.js developers there are several libraries that make it easier to send structured log events from

2022.1.7929 maintenance release

Monday, 18 July 2022

Another (possibly final!) Seq 2022.1 maintenance release is now available from Docker Hub, AWS ECR, and at

What's included?

In this release you'll find some small bug fixes and improvements:

  • Future events will use server timestamps by default (#1570) - events arriving

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.