OpenAnalytics

Open-source, privacy-first web analytics. One lightweight tracker script, no cookies, no cross-site profiles, aggregate-only reads — self-hostable on your own hardware under AGPL-3.0.

A hosted instance runs at getopen.so, operated by the authors: the same code, someone else's servers.

▶ Watch the dashboard in motion, a tour of these same screens on YouTube.

What is in this repository

The product, as one pnpm monorepo:

App	Role
apps/tracker	The browser snippet — a few KiB, with a byte budget CI enforces
apps/collector	Ingest: validates, sanitizes, rate-limits, enqueues
apps/worker	Drains the queue into ClickHouse; sessions, rollups, exports, mail, deletions
apps/api	Control plane: auth, sites, keys, sharing, event definitions, funnels, widgets, revenue, AI assistant, MCP
apps/query-gateway	The only process allowed to read ClickHouse; verifies signed query envelopes
apps/realtime	The SSE stream behind the live dashboard
apps/web	The dashboard (Next.js)
apps/cli	oa — site setup, stats, device-flow login
packages/*	domain, postgres (+migrations), clickhouse (+migrations), redis, auth, contracts (OpenAPI), observability, integrations, migrations, testkit

Stores: Postgres (control plane), ClickHouse (events and rollups), Valkey ×2 (one durable event queue, one losable realtime cache).

What it does, in one list: page views, custom and attribute-driven events, sessions, web vitals, funnels, per-site retention, embeddable widgets, public share links, revenue analytics from your Stripe account, CSV/JSON import and export, an MCP server, and a CLI.

Who is on the site now, from a presence cache rather than a table scan. Names are generated per visitor and mean nothing outside the day they were minted.

Where one visitor went, session by session. The identity behind a trail is a salted hash that rotates every night, so the trail is as long as a visit and never as long as a person.

Where they are, at city level and only when a site opts in. The lookup runs against a database on your own disk and never leaves the host.

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