Website analytics tools have exploded in 2026. GA4 is the default, but it’s often not enough — here’s the complete landscape.
Quick Comparison
| Tool | Free Plan | Starting Price | Best For |
|---|---|---|---|
| Google Analytics 4 | Yes (unlimited) | Free | General traffic & conversions |
| Microsoft Clarity | Yes (unlimited) | Free | Session recordings & heatmaps |
| Mixpanel | Yes (limited) | $20/month | Product analytics, funnels |
| Heap | No | $3,600/year | Auto-capture, retroactive analysis |
| FullStory | No | $300/month | Enterprise session replay |
| Hotjar | Yes (limited) | $32/month | Heatmaps & surveys |
| Plausible | No | $9/month | Privacy-first, simple dashboards |
| PostHog | Yes | $0 (self-host) | Open-source product analytics |
The Best Free Tools
Google Analytics 4 — Best Overall Free Tool
GA4 is the foundation. Every website should have it running regardless of what else you use.
Strengths:
- Free with no data limits
- Deep integration with Google Ads
- Event-based tracking catches everything
- BigQuery export on free tier
Weaknesses:
- 14-month data retention default
- Complex setup compared to UA
- No session recordings
Best for: Any website as the primary analytics layer.
Microsoft Clarity — Best Free Session Recorder
Clarity is the hidden gem of 2026. Completely free, no traffic limits, and includes heatmaps plus session recordings that GA4 can’t provide.
Strengths:
- 100% free, no session limits
- Heatmaps + session recordings
- Rage click and dead click detection
- GA4 integration built-in
Weaknesses:
- Limited funnel analysis
- No A/B testing
- Data retention: 90 days
Best for: Any site wanting session replay without paying for Hotjar. Full Clarity review →
Best for Product Teams
Mixpanel — Best for Event-Based Product Analytics
Mixpanel tracks user behavior through custom events, making it ideal for SaaS products and apps.
Pricing:
- Free: 20M events/month, 90-day history
- Growth: $20/month (unlimited events, 12-month history)
- Enterprise: Custom
Strengths:
- Best-in-class funnel and retention analysis
- User-level tracking with segmentation
- Real-time dashboards
- Cohort analysis
Weaknesses:
- Requires developer setup for proper event tracking
- Can get expensive at scale
Best for: SaaS products and mobile apps needing funnel analysis. Mixpanel vs. Heap →
Heap — Best for Auto-Capture Analytics
Heap captures every user interaction automatically, then lets you define events retroactively.
Pricing:
- Free tier: Limited
- Growth: ~$3,600/year
- Pro/Premier: Custom
Strengths:
- No pre-planning required — every click is captured
- Retroactive event definition
- Strong integrations (Salesforce, Marketo)
Weaknesses:
- Expensive for small teams
- Auto-capture can generate data noise
- Steeper learning curve
Best for: Product teams who want to analyze past behavior without re-instrumenting.
Best for UX Research
FullStory — Best Enterprise Session Replay
FullStory captures full session replays with DX Data for enterprise-grade UX analysis.
Pricing:
- Business: $300/month (estimated)
- Advanced/Enterprise: Custom
Strengths:
- Pixel-perfect session replays
- DX (Digital Experience) Data layer
- Strong privacy controls (data masking)
- Integrates with Amplitude, Segment
Weaknesses:
- Premium pricing
- Overkill for small sites
Best for: Enterprise teams running CRO programs at scale. Full FullStory review →
Hotjar — Best for SMBs Needing Heatmaps + Surveys
Hotjar combines heatmaps, session recordings, and user surveys in one tool.
Pricing:
- Basic: Free (35 daily sessions)
- Plus: $32/month
- Business: $80/month
Best for: Marketing teams wanting to combine quantitative and qualitative data without enterprise pricing.
Best Privacy-First Options
Plausible — Best Simple Privacy-Compliant Analytics
Plausible is a lightweight, GDPR-compliant alternative to GA4 with a clean single-page dashboard.
Pricing: Starts at $9/month (10k pageviews)
Strengths:
- No cookie banners required
- Open-source option (self-host free)
- Extremely simple UI
Weaknesses:
- No session recordings
- Limited segmentation
PostHog — Best Open-Source Option
PostHog combines product analytics, session replay, feature flags, and A/B testing in one open-source platform.
Pricing: Free (self-host), or cloud plans starting at $0 with usage-based pricing
Best for: Technical teams who want full control over their data.
How to Choose
| Situation | Recommended Stack |
|---|---|
| Just starting out | GA4 + Microsoft Clarity (both free) |
| SaaS/app product team | Mixpanel or PostHog |
| E-commerce CRO | Hotjar + GA4 |
| Enterprise UX research | FullStory or Heap |
| Privacy-first / EU audience | Plausible + Clarity |
The Free Stack That Covers Everything
If budget is zero: GA4 + Microsoft Clarity covers 90% of analytics needs for most websites — traffic data, session replays, heatmaps, funnels, and conversion tracking. Start here before paying for anything else.
Compare analytics tools side by side → Heap vs. Mixpanel | Microsoft Clarity Review