Logtail

Logtail is a modern log management service developed by Better Stack that provides fast, affordable, and developer-friendly structured log storage, search, and analysis. By focusing on structured logging and SQL-based querying, Logtail offers a more powerful and cost-effective alternative to traditional log management platforms for teams that want to treat logs as data rather than text files.

Structured logging is the foundation of Logtail's approach. Unlike traditional log management tools that treat log lines as unstructured text and rely on regular expression parsing, Logtail is designed for structured JSON logs that carry explicit key-value fields. When application code logs structured events with fields like user_id, request_path, duration_ms, and status_code, Logtail indexes these fields automatically, making them queryable, sortable, and filterable without any parsing configuration.

Log ingestion in Logtail supports multiple intake methods. Applications can send logs directly via the HTTP ingest API using any JSON over HTTP client. The Logtail agent and vector-based collector can forward logs from files, syslog, Docker containers, Kubernetes pods, and system journals. Official integrations exist for popular logging frameworks including Winston (Node.js), Pino (Node.js), Monolog (PHP), Ruby on Rails logger, Python logging, and others. Heroku drain and Render log drain integrations enable forwarding platform logs with minimal configuration.

The query interface in Logtail uses SQL for log analysis, which is a significant departure from proprietary query languages used by most log management tools. SQL is a familiar language for most developers and data engineers, and the powerful aggregation, filtering, and JOIN capabilities of SQL enable sophisticated log analysis without learning a custom syntax. The query editor provides autocomplete for log field names and SQL syntax.

Log tailing provides a live view of incoming logs in real time, with filtering capabilities that allow focusing on specific services, severity levels, or field values. This real-time view is invaluable for debugging and monitoring during deployments and incident investigation.

Alerts in Logtail are defined using SQL queries with threshold conditions, enabling alerting on any computed metric derived from log data. Alerts are delivered through Slack, email, webhooks, and PagerDuty integrations.

Logtail is integrated with the Better Stack platform, which means that log alerts can automatically create incidents in Better Stack's incident management workflow, combining observability and reliability management in a single platform.