Seq - Log Search

Structured Log Search and Analysis Server S Cloud Infrastructure

Basic Information

  • Company/Brand: Datalust
  • Founder: Nicholas Blumhardt (Creator of Serilog)
  • Country/Region: Australia
  • Official Website: https://datalust.co/
  • GitHub: https://github.com/datalust
  • Type: Structured Log Search and Analysis Server
  • Founded: 2014
  • Funding Status: Self-funded

Product Description

Seq is a real-time search and analysis server designed specifically for structured application logs and trace data. Its thoughtfully designed user interface, JSON event storage, and familiar query language make it an efficient platform for detecting and diagnosing issues in complex applications and microservices. Seq is particularly popular in the .NET ecosystem, with deep integration with Serilog. The release of Seq 2025.1 in 2025 introduced high-availability clustering and heatmap visualization.

Core Features/Characteristics

  • Structured Log Storage: JSON event storage, preserving the complete structured data of logs
  • Real-time Search: Fast search and filtering of structured logs
  • Dashboards and Visualizations: Built-in dashboards, with heatmap visualization added in 2025.1
  • High-Availability Clustering (New in 2025.1): Datacenter subscription tier supports unattended failover and scalable queries
  • Command Palette: Ctrl-Space command palette for quick feature discovery
  • System Notification Routing: Internal notifications like disk space warnings can be routed to email, chat, etc.
  • Data Privacy: Log data is stored on the user's own servers and not shared with Datalust
  • Multi-platform SDK: Supports .NET, Java, Node.js, Python, etc.

Business Model

  • Individual: Entry-level license
  • Team: Team collaboration (with data retention limits)
  • Standard: No data limits
  • Datacenter: High-availability clustering support
  • Price Range: $790 - $7,990/year
  • Self-hosted: All versions are self-hosted deployments

Deployment Methods

  • Windows Service
  • Docker Container
  • Linux Self-hosted
  • Cloud Infrastructure (AWS/Azure/GCP)

Target Users

  • .NET developers and teams
  • Application teams requiring structured logs
  • Microservices architecture operations
  • Organizations needing local log storage (data privacy)
  • Small to medium-sized development teams

Competitive Advantages

  • Designed specifically for structured logs, offering an excellent search experience
  • Fully self-hosted, ensuring data does not leave the premises
  • Deep integration with Serilog/.NET ecosystem
  • Beautiful user interface and query experience
  • High-availability clustering support in 2025.1
  • Relatively low operational complexity

Comparison with Competitors

DimensionSeqELK StackLoki
Core AdvantageStructured SearchFull-text SearchLow-cost Storage
Deployment ComplexityLowHighMedium
.NET IntegrationBestGoodGood
Data PrivacyFully Self-hostedSelf-hostedSelf-hosted/Cloud
Price$790+/yearFree (Self-hosted)Free (Self-hosted)
ScaleMediumLargeLarge

Relationship with OpenClaw Ecosystem

Seq is suitable for .NET components within the OpenClaw ecosystem or scenarios requiring detailed structured log analysis. If certain services in OpenClaw are developed using .NET, Seq's deep integration with Serilog can provide an excellent logging experience. Its fully self-hosted nature ensures the privacy of log data. However, for large-scale deployments or non-.NET technology stacks, Loki or ELK Stack may be more appropriate.

External References

Learn more from these authoritative sources: