Best Open Source Analytics Tools in 2026
Best Open Source Analytics Tools in 2026
Google Analytics is free but collects enormous amounts of user data and requires cookie consent banners. GA360 costs $150K+/year. Here are the best open source analytics tools that respect user privacy.
Quick Comparison
| Tool | Focus | License | Script Size | Cookie-Free | Self-Host |
|---|---|---|---|---|---|
| Plausible | Web analytics | AGPL-3.0 | <1 KB | ✅ | Docker |
| Umami | Web analytics | MIT | 2 KB | ✅ | Docker |
| Matomo | Full analytics suite | GPL-3.0 | 22 KB | ❌ (optional) | Docker |
| PostHog | Product analytics | MIT | 67 KB | ❌ | Docker |
| OpenPanel | Web + product | MIT | 5 KB | ✅ | Docker |
Detailed Breakdown
Plausible — Best Lightweight Analytics
Replaces: Google Analytics (for marketing teams)
- Cookie-free, GDPR compliant by default
- <1 KB script (45x smaller than GA)
- Real-time dashboard
- UTM campaign tracking
- Custom events
- Goals and conversions
- Google Search Console integration
- Email reports
What you get: Pageviews, visitors, bounce rate, visit duration, referrers, locations, devices — the essential metrics without the noise.
What you don't get: User-level tracking, funnels, session recordings, heatmaps.
Best for: Marketing teams, content sites, SaaS landing pages. Anyone who wants clean analytics without complexity.
Resource: 1 GB RAM, 1 core.
Umami — Best Free Alternative
Replaces: Google Analytics (for developers)
- Cookie-free, GDPR compliant
- Custom events via data attributes
- Shareable dashboard links
- Multiple website tracking
- Real-time data
- Team accounts
- MIT license (most permissive)
Advantage over Plausible: Completely free (no paid cloud tier). MIT license vs AGPL.
Best for: Developers who want analytics on side projects with zero cost.
Resource: 512 MB RAM, 1 core.
Matomo — Most Complete GA Replacement
Replaces: Google Analytics (full feature parity)
- Page analytics, events, goals
- Ecommerce tracking
- Heatmaps and session recordings (premium)
- A/B testing
- Form analytics
- Funnels and cohorts
- Tag manager
- Roll-up reporting (multi-site)
- GDPR compliance tools
- Import Google Analytics data
Best for: Organizations that need full Google Analytics feature parity, especially with ecommerce tracking.
Resource: 2 GB RAM, 2 cores.
PostHog — Best Product Analytics
Replaces: Mixpanel, Amplitude, Hotjar
- Event tracking and funnels
- Session recordings
- Feature flags
- A/B testing
- User paths
- Retention analysis
- SQL access to raw data
- Notebooks (data exploration)
Different from web analytics: PostHog is for understanding how users interact with your product, not just pageviews.
Best for: Product teams who need Mixpanel-level analytics with session recordings.
Resource: 4 GB RAM, 4 cores.
Choosing the Right Tool
| Need | Choose |
|---|---|
| Simple, clean web analytics | Plausible |
| Free, developer-friendly | Umami |
| Full GA replacement | Matomo |
| Product analytics + feature flags | PostHog |
| Ecommerce tracking | Matomo |
| Session recordings | PostHog |
| Smallest script size | Plausible (<1 KB) |
Privacy Comparison
| Feature | GA4 | Plausible | Umami | Matomo |
|---|---|---|---|---|
| Cookie-free | ❌ | ✅ | ✅ | Optional |
| GDPR consent needed | ✅ | ❌ | ❌ | Optional |
| Data ownership | You | You | You | |
| IP anonymization | Optional | Default | Default | Default |
| Script size | 45 KB | <1 KB | 2 KB | 22 KB |
Cost Savings
| Scenario | GA360 | Self-Hosted Plausible | Savings |
|---|---|---|---|
| Up to 1M pageviews | $150K/year | $54/year (VPS) | $149,946 |
| Marketing team | $9/month (Plausible Cloud) | $5/month (self-hosted) | $48/year |
For most sites, Plausible Cloud at $9/month or Umami self-hosted for free replaces GA entirely.
Compare all analytics tools on OSSAlt — privacy, features, and script sizes side by side.