Free, open-source OpenTelemetry backend powered by DuckDB and SQLite
Logs, metrics, and traces all in a single process.

Features

• Full OpenTelemetry support. Ingests traces, logs, and metrics via OTLP/gRPC and OTLP/HTTP.
• Single process. One container runs the entire stack: ingestion, storage, query, and UI.
• Automatic schema evolution. New fields in your telemetry automatically become queryable columns. No manual schema management.
• DuckDB + DuckLake. Telemetry stored as open Parquet files. Fast analytical queries, no heavy infrastructure.
• Explore. Query and visualize traces, logs, and metrics with a built-in query builder and trace waterfall view.
• Alert Rules. Define alert rules with Alertmanager-compatible webhook notifications.
• Notebooks. Compose and share investigative workflows combining queries and notes.
• Agent native. Built-in OAuth PKCE and an agent skill package let LLM agents query telemetry, manage alerts, and edit notebooks out of the box.

Philosophy

Wide events over scattered logs. Traditional logging produces dozens of narrow, context-free lines per request that are optimized for writing, not querying. We believe in wide events: single, rich records per unit of work that carry all the context you need. User info, business data, feature flags, timings. O11yLite's automatic schema evolution and high-cardinality columnar storage are designed specifically to make this style of instrumentation practical. Send us your 50-field spans and we'll make every field queryable without configuration.

Smaller but capable. The backend for observability doesn't need to be a distributed fleet of indexers and query nodes. Advances in embedded analytical databases like DuckDB mean a single process can handle what used to take a cluster. O11yLite leans into this: one container, one volume, minimal moving parts. Built to realize the potential of your 7000 MB/s NVMe drive. It sustains 140K events/s ingestion on a single M1 Max MacBook Pro and aims to serve teams from small startups through upper-mid-size organizations.

Built for you and your agents. O11yLite offers first-class agent support through lean, solid primitives and a builtin agent skill. The agent skill is considered the first class interface just like UI.

Quick Start

docker run -d \
  -p 80:80 \
  -v o11ylite-data:/data \
  ghcr.io/o11ylite/o11ylite:latest

Then:

• Open http://localhost for the UI
• Point your OTLP exporters at localhost:80. The built-in proxy routes both gRPC and HTTP on the same port

Documentation

• Installation — Docker and Helm chart setup
• Kubernetes OpenTelemetry Setup — Collect logs, traces, and metrics from your Kubernetes cluster
• Authentication — OIDC setup, API keys, and scopes
• Agent Native — First-class interface for LLM agents
• FAQ — Frequently asked questions

Development

See DEVELOPMENT.md for setup instructions, architecture details, and contribution workflow.

License

O11yLite is licensed under the GNU Affero General Public License v3.0. It's free for both personal and commercial use under AGPL copyleft terms.

For commercial use without AGPL obligations, contact zhming0.