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

Maintenance Release 5.1.3200

Tuesday, 27 August 2019

Seq 5.1.3200 is a new in-place update for Seq 5.1 that addresses a handful of bugs, and closes some small feature gaps. Binaries are available from the Seq downloads page, and container images from Docker Hub.

Directly download newline-delimited JSON

Continuing with our effort to support one

Introducing Datalust Accounts

Sunday, 18 August 2019

Today, we're introducing Datalust Accounts: a simple new facility that provides easy access to Seq license certificates and invoices.

Datalust Account login screen

Datalust Accounts are an important step towards streamlining how Seq licenses are managed.

When purchasing or renewing a Seq license, you'll now be presented with a request to sign in, or

Maintenance Release 5.1.3118

Monday, 10 June 2019

Seq 5.1.3118 is a straightforward in-place update that fixes several issues in earlier 5.x builds. Binaries are now available from the Seq downloads page and from Docker Hub.

The drivers for releasing this patch ahead of the original scheduled date are a pair of bugs in the

New from Datalust

.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.