For most SaaS startups, PostHog is the best analytics tool in 2026. It replaces Mixpanel, FullStory, LaunchDarkly, and Hotjar in a single open-source platform — with a generous free tier that covers you until you’re well past early stage.
Here’s the complete breakdown.
Product Analytics (Event Tracking)
PostHog — Best Overall
PostHog is an open-source product analytics platform that combines event tracking, session recording, feature flags, A/B testing, and user surveys in one tool. The free tier includes 1 million events/month.
What you get:
- Event tracking (custom events, autocapture)
- Session recordings (watch users navigate your product)
- Funnels (where do users drop off?)
- Retention cohorts (who comes back?)
- Feature flags (controlled rollouts, A/B tests)
- Surveys (NPS, CSAT, in-product questions)
- AI insights (ask questions in natural language, get analysis)
The self-hosted version is free forever. The cloud version is free up to 1M events/month and very reasonably priced beyond that.
We use PostHog on every project at Whipp Studio and recommend it to all clients as the default analytics stack.
Mixpanel
The incumbent product analytics tool. Excellent for event tracking, funnels, and cohort analysis. More polished UI than PostHog for pure analytics. More expensive and doesn’t include session recordings or feature flags.
Use Mixpanel when: Your team already knows it, or you specifically need its more advanced analytics features.
Skip Mixpanel when: You want one tool for everything or are budget-constrained early stage.
Amplitude
Enterprise-grade product analytics. Excellent behavioral analytics and predictive features. Pricing starts higher than competitors.
Use Amplitude when: You have dedicated data analysts and an analytics-heavy product team. Enterprise tier. Not for early-stage SaaS.
Web Analytics (Traffic and Pages)
Plausible Analytics ($9/month)
Plausible is a privacy-first, cookie-free web analytics tool built in the EU. GDPR compliant without consent banners. Simple, fast, and accurate.
Use for: Marketing site traffic, blog performance, referral sources, geographic data.
Don’t use for: Product analytics (it tracks pages, not user behavior inside your app).
Google Analytics 4
Free, powerful, complex. GA4 is excellent if you have someone who can interpret it. The learning curve is steep. Privacy compliance requires careful consent management.
Use for: Marketing sites where you want Google integration (Search Console, Google Ads) and you have analytical capacity.
Session Recording
PostHog (Included in PostHog)
Session recordings are included free in PostHog’s free tier. Watch exactly how users navigate your product, where they struggle, and where they drop off. This is often more valuable than any aggregate metric.
FullStory
The gold standard for session recording. More polished than PostHog’s recordings. Significantly more expensive. Relevant for established products with large teams.
Feature Flags and A/B Testing
PostHog (Included)
Feature flags and A/B tests are included in PostHog. Ship features to specific user segments, run experiments, and measure impact — all within the same tool as your analytics.
LaunchDarkly
The enterprise-grade feature flag platform. Significantly more powerful for complex flag management at scale. Much more expensive. Relevant above $2M ARR or for large engineering teams.
The Recommended Analytics Stack by Stage
Pre-launch to $50K MRR:
- PostHog (product analytics, session recording, feature flags)
- Plausible (marketing site analytics)
- Total cost: ~$9/month
$50K–$500K MRR:
- PostHog (still covers most needs)
- Consider upgrading to PostHog’s paid tier for more advanced features
- Total cost: $250–500/month
$500K+ MRR:
- Evaluate Amplitude or Mixpanel for dedicated product analytics
- PostHog still great for session recording and feature flags
- Consider a dedicated data warehouse (BigQuery, Snowflake) for advanced analysis
Frequently Asked Questions
Do I need analytics before I have users? Set up PostHog and Plausible before you launch. Retroactive analytics don’t exist — you can only analyze events that were tracked. Better to have it from day one.
Is Google Analytics enough for a SaaS product? For the marketing site, yes. For understanding user behavior inside your app, no. GA4 is not designed for product analytics the way PostHog is.
What’s the difference between web analytics and product analytics? Web analytics tracks pages and traffic (sessions, pageviews, sources). Product analytics tracks user behavior (events, funnels, retention, feature usage). You need both.
Can PostHog replace Hotjar? Mostly yes. PostHog’s session recordings and heatmaps cover the main Hotjar use cases. PostHog is more developer-friendly and has a better free tier.
How much data can I store on the PostHog free tier? 1 million events per month, with 1 year of data retention on the cloud plan. More than enough for most early-stage SaaS products.
Building a SaaS and need analytics set up properly from day one? At Whipp Studio, PostHog is part of our standard setup for every project. Book a free strategy call →