Datalust, the company behind Seq

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

Seq Screenshot

News and announcements

What's coming in Seq 2021.3?

Tuesday, 12 October 2021

We're only two weeks away from the release of Seq 2021.3, on October 26th! The latest preview build is feature-complete, so now's a great time to share an update on what you can look forward to in this release.

2021.3 is, quite frankly, huge. Earlier this year, we

Understanding the Seq Storage view

Tuesday, 17 August 2021

Seq 2021 introduced a fantastic new visualization of how Seq uses disk and memory resources, under Data > Storage:

The Seq Storage screen

We created Storage because we we don't believe in the "store everything and sort it out later" philosophy of log centralization. This initially-intriguing idea leads down a path of

Seq 2021.3 previews now available

Tuesday, 18 May 2021

The first 2021.3 preview builds are now live on and Docker Hub. Along with some other improvements, they include the very first pieces of clustered Seq: disaster recovery (DR) and zero-downtime upgrades through asynchronous replication.

Cluster-aware functionality is behind a feature flag and will ship with

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.