Flareboard

Product analytics that runs entirely on Cloudflare: website analytics, session replay, feature flags, experiments, surveys, error tracking, logs and LLM observability in one place, without ClickHouse or Kubernetes. A PostHog-like product surface on Workers, Durable Objects, D1, R2, KV and Queues.

flareboard.dev · Live demo · Pricing · Blog · @flareboard/js on npm

Product

• Product analytics: overview, events, actions, sessions, realtime, funnels, journeys, retention, stickiness, people and groups, segments, cohorts, UTM, attribution, revenue (with Stripe MRR), Web Vitals at p75, insights, boards, notebooks and reports.
• Session replay and heatmaps: rrweb replays stored in R2 with inputs masked by default, saved and shared replays, click and scroll heatmaps.
• Feature flags and experiments: targeting rules, rollouts, variants and payloads, flag-linked experiments with frequentist and Bayesian results.
• Surveys and workflows: NPS, CSAT and open feedback surveys; event-triggered workflows with delays, branches, webhooks, email and Slack.
• Errors, logs and traces: error issues with source maps and alerts, OpenTelemetry (OTLP) logs and traces, AI / LLM observability (cost, tokens, latency, traces).
• For teams and agents: "Ask Flareboard" assistant, an MCP server, read-only SQL over your data, teams and roles, SSO, audit log and personal API keys.

Privacy: cookieless by default (a monthly-salted hash of IP and user agent; IPs are never stored), autocapture never records field values.

Add it to a site

<script defer src="https://t.flareboard.dev/script.js" data-website-id="YOUR_WEBSITE_ID"></script>

Or with npm (typed, with React hooks for feature flags) — see the @flareboard/js README:

npm install @flareboard/js

PostHog SDKs can send to Flareboard too: PostHog compatibility.

Architecture

Component	Dev port	Role
apps/ingest	8787	Tracking: /script.js, /api/send, replay, OTLP logs and traces, PostHog-compatible capture, short links and pixels
apps/api	8788	Authenticated REST API, MCP server, scheduled jobs (alerts, retention, deletion)
workers/aggregator	—	Queue consumer: writes events to each website's store, keeps rollups and monthly usage
apps/dashboard	5173	React dashboard (Vite, shadcn/Base UI, Geist)
apps/blog	—	Astro blog
packages/sdk-js	—	@flareboard/js browser SDK

Storage: every website's analytics (events, sessions, people, logs, spans, rollups) lives in its own SQLite-backed Durable Object; D1 holds accounts, websites, configuration and usage; R2 stores replay recordings; KV caches realtime counters and API responses; Queues absorb ingest spikes. Shared packages: @flareboard/db, @flareboard/shared, @flareboard/rate-limiter.

Local development

Requires Node.js 20+ and pnpm 9+.

pnpm install
cp apps/api/.dev.vars.example apps/api/.dev.vars
cp apps/ingest/.dev.vars.example apps/ingest/.dev.vars
pnpm db:migrate
pnpm seed

Then run each in its own terminal:

pnpm dev:api        # :8788
pnpm dev:ingest     # :8787
pnpm dev:dashboard  # :5173
pnpm dev:aggregator

Open http://localhost:5173 and sign in with the credentials pnpm seed prints (scripts/seed.ts --help for overrides). pnpm typecheck and pnpm test cover every package.

Deploy

Production setup (Cloudflare resources, secrets, custom domains): Deployment guide. Forkers: replace the D1, KV, R2, Queues and Durable Object bindings in each app's wrangler.jsonc with your own resources before deploying.

Docs

Development	Local dev, scripts, smoke tests
API reference	REST and ingest endpoints
Tracking and ingest	Endpoints, payloads, tracker script, recorder, flags, surveys
PostHog compatibility	Sending from PostHog SDKs
Logs and traces	OpenTelemetry (OTLP) ingest
LLM observability	AI generations, cost and traces
MCP server	Flareboard tools for AI agents
SSO	Single sign-on
Dashboard design system	Console UI rules
Database	Schema and migrations
Security	Vulnerability reporting

License

PolyForm Noncommercial License 1.0.0 — free for personal, educational, and other noncommercial use. Commercial use requires separate permission from the copyright holders.

The browser SDK @flareboard/js is MIT-licensed, so you can add it to any site, commercial or not. Using the hosted service at flareboard.dev is covered by its Terms of Service.