Signals stacked and
left for someone to read.
Cairn OBS is an open-core, Kubernetes-native log aggregation platform — one query language over structured and full-text search, dashboards, alerting, multi-tenant RBAC, and AI-assisted query authoring. Built to compete with Splunk on features and win on cost-per-GB.
Explore
One platform, six things worth reading about
Each page below stands on its own — pick the piece you care about.
Features
Query language, dashboards, alerting, the cross-platform agent, multi-tenant RBAC, and AI-assisted queries — none held back for a paid tier.
See what's built →Architecture
How a log line actually moves: agent → transport → independent ClickHouse and Tantivy consumers → query API, plus how tenant isolation and deployment work.
See the pipeline →Stack
Rust, Go, ClickHouse, Tantivy, Redpanda, SvelteKit — boring, well-understood dependencies, picked for being proven rather than novel.
See the choices →License
AGPLv3, the whole thing, no exceptions — including multi-tenant RBAC and SSO. Self-host it, fork it, run it as a service.
Read the terms →About
What the name means, the cairn/Inuksuit symbolism behind it, and why this project exists in the first place.
Read the story →Demo
Screenshots from the working prototype. Early days — a public demo instance is on the way, not live yet.
See screenshots →