Structured logs are the observability pillar that uniquely models your apps and services. They capture the detailed, domain-specific events you need to debug tough problems, and they're perfect for monitoring and analyzing system behavior in real time.
Seq has already solved several visibility problems
— Arri Rucker
Seq is built from the ground up for modern structured logging. Events are captured as fully-structured JSON data, and Seq's query language makes it natural to search and manipulate them without awkward parsing or format handling.
Seq accepts logs via HTTP, OpenTelemetry/OTLP,
custom inputs, and
seqcli command-line client, with plug-ins or integrations
available for .NET, Java, Node.js, Python, Ruby, Go, Docker, message queues, and many other technologies.
Seq is a centralized log file with superpowers.
Intuitive expression-based filtering, combined with free-text and regular expression searches, mean you can drill down into events quickly, using techniques you already know.
Go deeper with SQL-style log analysis and time-slicing to find trends and create beautiful charts and dashboards.
Watch error rates, track latencies, or visualize business performance using structured data from your application log events.
Be in-the-know about problems before your users or customers are affected.
Set alerts based on custom conditions, and send notifications to a variety of channels including Slack, Teams, and SMTP mail.
Write custom integrations using a simple C# library, or as command-line apps in any programming language.
Learn how our customers are using Seq — to uncover bugs, avoid outages, and improve visibility into complex apps and services.
See more case studies.