What is Funnel?

If you run marketing campaigns, you probably send the same events (page views, sign-ups, purchases) to several analytics tools: Google Analytics, the Meta Pixel, TikTok, and so on. Each one has its own SDK, its own event names, and its own parameter shapes. Wiring them up separately is repetitive and easy to get out of sync.

Funnel solves this with one idea: write each event once, in the GA4 standard, and let plugins translate it for every platform.

// You write this, once:
funnel.track("purchase", { currency: "KRW", value: 29000, transaction_id: "T-1" });

// Funnel dispatches it to every connected plugin, each mapping it to its own format:
//   → GA4        gtag("event", "purchase", …)
//   → Meta Pixel fbq("track", "Purchase", …)
//   → TikTok     ttq.track("CompletePayment", …)

The mental model

• GA4 is the canonical schema. Every event name and parameter follows the GA4 convention. Plugins map from GA4 to their platform, never the other way around.
• One track() call fans out to all plugins. You connect plugins once; every event reaches all of them.
• Plugins are error-isolated. If one plugin throws, the others still receive the event.
• Every event gets a unique eventId. This enables server-side deduplication (for example, matching a browser Meta Pixel event with a server-side Conversions API event).

What Funnel is not

• It is not an analytics product. It sends data to analytics tools; it does not store or visualize it.
• It does not bundle the platform SDKs. You still load gtag, fbq, etc. as usual; Funnel calls those globals for you.

Next steps

1. Install Funnel
2. Send your first events in 5 minutes
3. Read the core concepts when you want to go deeper.