PostHog
The All-in-One Product Analytics and User Behavior Suite
What is PostHog?
PostHog is a complete open-source product analytics platform. Beyond counting pageviews, it helps you understand the entire user journey in your SaaS through **session recordings**, **heatmaps**, **custom event tracking**, **feature flags** (for progressive releases), and **A/B testing**.
Key Features to Optimize Your SaaS
🎥 Session Replays
Watch video replays of real user interactions. Identify where they get stuck and optimize flows to reduce churn.
🚩 Built-in Feature Flags
Roll out new features progressively to a percentage of users, or release specific features only to beta testers.
📊 Conversion Funnels & Cohorts
Create funnels to monitor where users drop off in your onboarding flow and group users by shared behavior.
⚡ Autocapture Events
PostHog captures clicks and form submissions out of the box, saving you from writing manual tracking code upfront.
Practical Example: Initialization and Custom Events
Here is an example of initializing PostHog in a Next.js application and capturing custom conversion events:
import posthog from 'posthog-js';
// Initialize on the client-side
if (typeof window !== 'undefined') {
posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY, {
api_host: process.env.NEXT_PUBLIC_POSTHOG_HOST || 'https://us.i.posthog.com',
person_profiles: 'identified_only', // Optimizes GDPR/LGPD compliance
capture_pageview: true // Automatically track pageviews
});
}
// Example: Trigger event when a user signs up for a trial
export function trackTrialSignup(userId, planName) {
posthog.identify(userId); // Associate events with a specific user
posthog.capture('trial_signup_completed', {
plan: planName,
signup_date: new Date().toISOString()
});
}