Get Alerted on High-Signal Events From Your Product Analytics

The problem

Your product analytics tool captures every pageview, every click, every event, every conversion, every drop-off. Most of that volume lives in dashboards and weekly reports, where it belongs. It is aggregate data, not real-time attention.

But some events are signals you want to be interrupted for the moment they happen. A new paid user signing up. A whale account hitting the activation event. A key funnel dropping 40 percent overnight. A churn signal on a top-ten customer. These events matter more than any aggregate trend, and waiting for the Monday dashboard review is too slow.

The failure mode is not that analytics tools lack notifications. They all have notifications. The failure mode is that the notifications they send are the wrong shape for real-time interruption:

  1. Email digests are daily or weekly, which means you find out about a new enterprise signup 24 hours late.
  2. In-app notifications only fire when you are already logged in, which means you see them when you open the tool out of curiosity, not when the moment happened.
  3. Dashboard alerts assume someone is watching the dashboard, which means you do not actually need the alert because you would have already seen it.

The events that matter most are the ones that need to leave the dashboard and get pushed to your phone directly, the moment they fire.

The general shape of the fix

Most modern product analytics tools support outbound webhooks, functions, or destinations that fire when a specific event or filter matches. You configure that webhook to point at API Alerts, filtered aggressively so only the “wake me up for this” events get through, and the API Alerts mobile app buzzes your phone the moment one lands.

The principles that keep this from turning into noise:

  1. Filter ruthlessly at the source. Your product generates thousands of events per hour. Fewer than ten of those are worth interrupting someone for. If you are sending more than ten event types to API Alerts, you are probably sending the wrong events.
  2. Include enough context to skip the dashboard trip. The notification should be readable on its own: “New enterprise subscription from acme.com ($2400/year)” not “new_subscription event fired, open dashboard to see.”
  3. One channel per signal type. A wins channel for first-paid-user events, a retention channel for churn signals, an activation channel for key funnel milestones. Each channel is its own feed in the mobile app, so the big moments do not get buried under operational chatter and the person who cares about one signal does not have to scroll past everyone else’s.
  4. Non-developers can wire this up. This is the whole point. Marketing, product, and founder personas can add, tune, or disable alerts without touching code or asking engineering. Engineering does not become the bottleneck for “can we alert on X?”

What this unlocks: the person who cares about the signal owns the config. Marketing wires up “buzz my phone when a new subscription hits the enterprise plan.” Product wires up “notify me when a signup hits the activation event.” The founder wires up “push me the moment first paid user signs up.” Each alert lives with the person it serves. Engineering reviews the auth model once, then steps out of the loop.

Implementation by analytics tool

PostHog

PostHog has first-class outbound webhook destinations that can filter on event name, cohort membership, or property values. The pairing with API Alerts is the canonical analytics-to-alerting flow.

  1. In PostHog, go to Data Pipelines → Destinations → New destination → Webhook
  2. Set the URL to your API Alerts webhook ingestion endpoint
  3. Configure the filter to match only the events you care about (e.g. event = "$identify" with a property condition like properties.plan = "enterprise")
  4. Set the HTTP method to POST and the payload template to whatever fields you need
  5. Save and enable

For the full PostHog setup walkthrough with screenshots and the exact payload shape, see the PostHog integration page. The relationship with PostHog is complementary by design: PostHog tracks everything, API Alerts pings you about what matters.

Segment

Segment has a Webhooks destination in its Cloud Destinations catalog. The path is clean if your event data already lives in Segment.

  1. In Segment, go to Destinations → Add Destination → search for “Webhooks”
  2. Connect it to the source that is emitting your analytics events
  3. Configure the destination with your API Alerts endpoint URL and any required auth headers
  4. Use Destination Filters to limit which events reach the webhook (critical, see principle 1 above)
  5. Optionally use Segment Functions to transform the payload if the default Segment shape does not match what API Alerts expects

For teams already on Segment, the config lives entirely inside Segment’s UI. No backend changes, no new infrastructure.

RudderStack

RudderStack is structurally similar to Segment. It has a Webhook destination in the Cloud Destinations catalog.

  1. In RudderStack, go to Destinations → Add Destination → search for “Webhook”
  2. Connect it to a source
  3. Configure the webhook URL and headers
  4. Apply event filtering at the source or use RudderStack’s Transformations feature to drop anything that does not match your high-signal criteria

The same “filter ruthlessly” principle applies. RudderStack is open-source-friendly and self-hostable, so this path is particularly good for teams that already run RudderStack for analytics routing.

Amplitude

Amplitude’s notification surface is different from PostHog and Segment. Instead of routing raw events, Amplitude alerts fire on cohorts and anomalies: “the daily active users of cohort X dropped 20 percent” or “a new user entered the high-value cohort.”

  1. In Amplitude, go to Cohorts or Dashboards and create an alert on the metric you care about
  2. Set the alert action to Webhook
  3. Point it at your API Alerts endpoint
  4. Configure the alert threshold and schedule

This gives you aggregate-signal alerts rather than per-event alerts. Both patterns are valid. Pick Amplitude’s cohort-alert pattern when you care about statistical signals, and PostHog or Segment’s raw event pattern when you care about individual moments.

Mixpanel

Mixpanel has Alerts for metric thresholds and signal changes. The alert can trigger a webhook.

  1. In Mixpanel, go to Alerts → New alert
  2. Pick the metric or signal (e.g. “new subscription count today” or “churn rate hourly”)
  3. Set the threshold
  4. Set the action to Webhook with your API Alerts endpoint

Same shape as Amplitude: aggregate signals, not per-event firing. Useful for “the signup rate dropped below baseline” or “conversion funnel A is performing 30 percent better than yesterday.”

Google Analytics 4 (via Zapier)

Google Analytics 4 does not natively emit outbound webhooks for real-time events. The cleanest path is via Zapier:

  1. In Zapier, create a new Zap with the Google Analytics 4 trigger (e.g. “New Conversion” or “New Event”)
  2. Add an API Alerts action as the next step
  3. Map the GA4 event fields into the API Alerts event payload
  4. Turn on the Zap

This works for the subset of GA4 events that Zapier exposes. For more complex setups (custom dimensions, cohorts, funnel drops), you can export GA4 data to BigQuery and use a Cloud Function to watch for signal events and call API Alerts. That is heavier infrastructure than most teams need, but the option exists.

Get started in 5 minutes

  1. Create a free workspace and grab an API key
  2. Pick the one analytics event you would genuinely want your phone to buzz for (start with one, you can add more later)
  3. Configure your analytics tool’s webhook destination pointed at API Alerts
  4. Install the API Alerts mobile app and sign in to the same workspace
  5. Fire a test event and watch the notification land on your home screen

Non-developers on your team can do steps 2 through 4 without touching code. Free tier is 1,000 events per month, which is sized for high-signal alerting, not high-volume analytics. If you find yourself hitting the ceiling, the first question is “are these events still genuinely critical, or have they drifted toward noise?” before it is a tier question.