Best Open Source Alternatives to Google Analytics in 2026
Google Analytics Has a Privacy Problem
Google Analytics 4 sends every visitor interaction to Google's servers. Google uses that data for ad targeting across its network. Your visitors become Google's product -- and you're the one installing the tracking code that makes it happen.
This isn't hypothetical. Data protection authorities in Austria, France, Italy, Norway, and Sweden have ruled that using Google Analytics violates GDPR. The CNIL fined Google EUR 325 million in 2025 for consent violations. Cumulative GDPR fines have exceeded EUR 5.88 billion since 2018 -- and analytics data transfers remain a top enforcement target.
Google Analytics requires cookie consent banners in the EU. Roughly 30-50% of visitors reject cookies, which means GA4 only tracks a fraction of your actual traffic. Your analytics are both privacy-invasive and inaccurate at the same time.
Beyond GDPR, GA4 uses data sampling on large datasets and Google can deprecate features at will -- as it did when it killed Universal Analytics. Open source analytics fix all of this: self-hosted data, cookieless tracking, no consent banners, and no vendor lock-in.
TL;DR
Plausible is the best Google Analytics alternative for most websites -- lightweight, privacy-first, and effortless to set up. For teams that need GA-level depth with heatmaps, funnels, and ecommerce tracking, Matomo is the most feature-complete option. If you need product analytics alongside web analytics -- session replays, feature flags, and A/B testing -- PostHog is the all-in-one platform.
Key Takeaways
- Plausible (24K+ GitHub stars) has a script under 1 KB -- 75x smaller than Google Analytics. No cookies, GDPR-compliant by default. Self-host for free or use cloud starting at $9/month.
- Umami (23K+ GitHub stars) is a clean, fast, privacy-focused dashboard. Self-host free or use cloud with 1 million free events/month. The simplest self-hosting setup of any tool here.
- Matomo (1M+ websites) is the closest feature-for-feature GA replacement -- goals, funnels, heatmaps, session recordings, A/B testing, and ecommerce tracking. Self-host free, cloud from $23/month.
- PostHog (25K+ GitHub stars) goes beyond web analytics into product analytics -- session replay, feature flags, experimentation, and surveys. Free tier includes 1 million events/month.
- Open Web Analytics (2.5K+ GitHub stars) is a PHP-based self-hosted tool with built-in heatmaps and click tracking. Completely free.
- Self-hosted analytics see 100% of your traffic because first-party scripts aren't blocked by ad blockers -- unlike GA4, which misses 25-40% of visitors.
Quick Comparison
| Tool | GitHub Stars | Script Size | Cookies | Self-Hosted | Cloud Pricing | Best For |
|---|---|---|---|---|---|---|
| Plausible | 24K+ | <1 KB | No | Free | From $9/mo | Simple, privacy-first analytics |
| Umami | 23K+ | ~2 KB | No | Free | Free tier (1M events) | Clean dashboards, easy self-hosting |
| Matomo | 20K+ | ~22 KB | Optional | Free | From $23/mo | Full GA replacement with advanced features |
| PostHog | 25K+ | ~6 KB | Configurable | Free (MIT) | Free tier (1M events) | Product + web analytics combined |
| Open Web Analytics | 2.5K+ | ~15 KB | Yes | Free | N/A (self-host only) | PHP users who want heatmaps |
Accuracy: Why Self-Hosted Analytics Beat GA4
Google Analytics loads from google-analytics.com -- a third-party domain that ad blockers (uBlock Origin, Brave, Pi-hole) block by default. Depending on your audience, 25-40% of visitors are invisible to GA4. Self-hosted tools serve scripts from your own domain, bypassing ad blockers entirely.
| Metric | Google Analytics 4 | Self-Hosted Tools |
|---|---|---|
| Visitors tracked | 60-75% of actual | 95-100% of actual |
| Cookie consent required (EU) | Yes | No (cookieless options) |
| Data sampling | Yes (large datasets) | No |
| Blocked by ad blockers | Yes | No (first-party domain) |
For tech-savvy audiences, the gap is even wider. A developer blog on GA4 might see only 50-60% of actual visits. Switching to self-hosted analytics typically reveals 30-50% more traffic.
Plausible -- Best Lightweight, Privacy-First Analytics
Where GA4 has hundreds of reports and a steep learning curve, Plausible shows you one clean dashboard with everything that matters. The tracking script is under 1 KB -- 75x smaller than GA4. No cookies, no personal data, GDPR/CCPA/PECR compliant out of the box.
Key Features
- Single-page dashboard -- pageviews, visitors, bounce rate, visit duration, top pages, referrers, countries, devices, and browsers on one screen
- Goal and event tracking -- conversions, button clicks, form submissions, file downloads, outbound link clicks, and ecommerce revenue
- Search Console integration -- Google search queries, impressions, and CTR directly in your Plausible dashboard
- Automated reports -- weekly/monthly email and Slack summaries, plus real-time traffic spike notifications
- Funnel analysis and UTM tracking -- multi-step conversion funnels and full campaign parameter support
- Stats API -- programmatic access to all analytics data for custom dashboards and integrations
Pricing
- Self-hosted (Community Edition) -- Free, AGPL-3.0 license, all features included
- Plausible Cloud -- starts at $9/month for 10K monthly pageviews, $19/month for 100K, $69/month for 1M
Self-Hosting Requirements
- Plausible server -- Elixir application
- ClickHouse -- analytics database (high-performance column store)
- PostgreSQL -- configuration database
Docker Compose gets you running in 15-20 minutes. ClickHouse handles millions of pageviews per month on a single VPS. 4GB+ RAM recommended.
Best For
Content sites, blogs, and SaaS landing pages that want accurate, privacy-respecting analytics without complexity.
Limitations
Intentionally simple. No session recordings, heatmaps, or user-level analytics. If you need cohort analysis or deep funnel optimization, Plausible won't cover it -- by design.
Umami -- Best Free Cloud Tier and Simplest Self-Hosting
Umami takes a similar privacy-first approach with a developer-friendly tilt. Self-hosting requires only Node.js and a database -- the simplest setup in this category. The cloud service includes 1 million free events per month.
Key Features
- Real-time dashboard -- live visitor count, active pages, traffic sources, and geographic data
- Custom events and UTM tracking -- track any interaction with a simple API call, full campaign parameter support
- Multiple websites and teams -- track unlimited sites from one instance with role-based team access
- Links and Pixels (v3) -- short URLs for click tracking and invisible pixels for email open rate measurement
- REST API -- programmatic access to all analytics data
Pricing
- Self-hosted -- Free, MIT license, unlimited everything
- Umami Cloud Hobby -- Free, 1 million events/month (100K events/month per website, up to 3 websites)
- Umami Cloud Pro -- $20/month, higher limits and additional features
Self-Hosting Requirements
- Umami app -- Node.js application
- PostgreSQL or MySQL -- database
Two services. Docker Compose or npm install and a database connection. Minimum: 1GB RAM, 1 vCPU. The lightest self-hosted analytics deployment available.
Best For
Developers, side projects, and indie products where the free cloud tier covers everything. Teams that want the simplest possible self-hosting setup.
Limitations
No built-in funnel analysis, Search Console integration, or revenue tracking. Less configurable reporting than Matomo or PostHog. Excels at basic traffic analytics but advanced marketing use cases will hit limits.
Matomo -- Most Feature-Complete GA Replacement
Formerly Piwik (launched 2007), Matomo powers over 1 million websites in 190 countries. If you need a near-1:1 GA replacement with heatmaps, session recordings, funnels, A/B testing, and ecommerce -- Matomo covers it all.
Key Features
- Full web analytics suite -- all the reports GA4 has (pageviews, sessions, bounce rates, entry/exit pages, real-time) without data sampling
- Heatmaps and session recordings -- click maps, scroll depth, mouse movement tracking, and full session replay
- Funnels, A/B testing, and ecommerce -- conversion funnels, built-in experimentation, and product-level revenue tracking with WooCommerce/Magento/Shopify integrations
- Built-in tag manager -- eliminates the need for Google Tag Manager
- Cookieless tracking -- optional mode that removes consent banner requirements while maintaining accuracy
- 70+ plugins -- marketplace with SEO dashboards, form analytics, media analytics, and more
Pricing
- Self-hosted (On-Premise) -- Free, GPL-3.0 license, all core features. Premium plugins (heatmaps, session recordings, A/B testing) available individually or bundled
- Matomo Cloud -- from $23/month for 50K hits/month, scaling up to enterprise tiers
Self-Hosting Requirements
- Matomo server -- PHP application
- MySQL or MariaDB -- database
- Web server (Apache or Nginx)
Standard LAMP/LEMP stack -- if you host PHP apps, Matomo slots right in. One-click installers for Docker, Softaculous, and popular hosting panels. 2GB RAM handles 100K monthly visits, 8GB+ for 1M+.
Best For
Organizations that need full GA-parity with heatmaps, session recordings, and advanced segmentation. Ecommerce sites that need product-level revenue tracking. Teams migrating from GA4 who want familiar report structures and complete data sovereignty.
Limitations
Heaviest tool on this list -- higher server requirements than Plausible or Umami. The interface can feel dated. Premium features (heatmaps, A/B testing, funnels) require paid plugins on self-hosted -- included in cloud plans. Archive processing for large sites needs cron jobs.
PostHog -- Best All-in-One Product Analytics Platform
PostHog combines web analytics, product analytics, session replay, feature flags, A/B testing, surveys, error tracking, and a data warehouse in one platform. If you're building a SaaS product and want one tool instead of stitching together GA + Hotjar + LaunchDarkly + Mixpanel, PostHog replaces all of them.
Key Features
- Web + product analytics -- pageviews, sessions, funnels, retention, user paths, cohorts, and lifecycle analysis in one dashboard
- Session replay -- full DOM recording with clicks, scrolls, rage clicks, console logs, and network requests
- Feature flags and A/B testing -- gradual rollouts, multi-variant experiments, and automatic winner detection
- Surveys and error tracking -- in-app surveys (NPS, multiple choice, open text) and JS error capture tied to session replays
- Data warehouse -- 7 years of retention on paid plans with SQL access to raw event data
Pricing
- Self-hosted (Open Source) -- Free, MIT license. Core product analytics and feature flags
- PostHog Cloud Free -- 1 million product analytics events, 5,000 session replays, 1 million feature flag requests, 250 survey responses per month. No credit card required
- PostHog Cloud Paid -- usage-based pricing. Product analytics starts at $0.00005/event beyond the free tier. 98% of PostHog customers use the platform for free
Self-Hosting Requirements
- PostHog -- the application stack
- PostgreSQL -- primary database
- ClickHouse -- analytics database
- Redis -- caching and queues
- Kafka -- event ingestion pipeline (production deployments)
PostHog's self-hosted deployment is the most complex here -- designed for Kubernetes via Helm charts. Docker Compose is available for evaluation. Minimum: 8GB+ RAM, 4 vCPUs. For most teams, the generous cloud free tier makes more sense than self-hosting.
Best For
Product teams building SaaS applications who want analytics, session replay, feature flags, and experimentation in one platform instead of five separate tools.
Limitations
Overkill if you just want traffic stats. Web analytics is newer and less mature than Plausible or Matomo for pure web use cases. Self-hosting is complex. Event-based pricing can get expensive at high volumes beyond the free tier.
Open Web Analytics -- Best for PHP-Based Self-Hosting
Open Web Analytics (OWA) is the oldest active open source analytics project. Built in PHP, it runs on the same LAMP stack as WordPress and Drupal. Its standout feature: built-in heatmaps and click tracking at no cost -- something most competitors charge for.
Key Features
- Standard web analytics -- pageviews, visitors, referrers, search terms, geography, browsers, and operating systems
- Built-in heatmaps -- click heatmaps on every page at no extra cost. No premium plugin required
- Clickstream and Domstream -- full visitor path tracking and DOM interaction recordings for behavior analysis
- WordPress integration -- official plugin for one-click installation and dashboard widgets
- Unlimited websites -- track multiple sites from a single self-hosted instance
Pricing
- Self-hosted -- Free, GPL license. No cloud option, no paid tiers. Entirely self-hosted
Self-Hosting Requirements
- OWA application -- PHP
- MySQL -- database
- Web server (Apache or Nginx)
Standard LAMP stack. If you run WordPress, OWA installs alongside it. 1-2GB RAM handles typical sites.
Best For
PHP developers and WordPress users who want analytics on their existing server without new infrastructure. Teams that want built-in heatmaps at no cost.
Limitations
Smaller community and slower release cadence than others here. The interface is dated and documentation is sparse. No cookieless tracking -- cookies are required. No managed cloud option. Heatmaps can struggle with responsive layouts and high-traffic pages.
How to Choose
"I just want simple, accurate traffic stats" -- Plausible. One dashboard, sub-1 KB script, no cookies, 15-minute setup. The best default choice for most websites.
"I want the cheapest option with a free cloud tier" -- Umami. 1 million free events/month on cloud. Self-hosting requires only Node.js and a database.
"I need everything GA4 does, plus heatmaps" -- Matomo. The only open source tool with full web analytics, heatmaps, session recordings, A/B testing, and ecommerce tracking in one package.
"I'm building a SaaS product" -- PostHog. Web + product analytics, session replay, feature flags, and experimentation in one platform.
"I run PHP/WordPress and want heatmaps for free" -- Open Web Analytics. Installs on your existing LAMP stack, includes heatmaps at no cost.
"I need GDPR compliance without thinking about it" -- Plausible or Umami. Both are cookieless and GDPR-compliant by default. No consent banners needed.
Cost Comparison: GA4 vs Open Source
GA4 is "free" the way Gmail is free -- you pay with your data. Google 360 costs $50,000+/year. Even the free tier has hidden costs: consent banner development, GDPR legal review, and inaccurate data from ad blocker losses.
| Solution | Monthly Cost | Annual Cost | Includes |
|---|---|---|---|
| GA4 (free tier) | $0 + your data | $0 + your data | Analytics with sampled data, no data ownership |
| GA 360 | ~$4,166+ | $50,000+ | Unsampled data, SLAs, BigQuery export |
| Plausible Cloud | $9-$69 | $108-$828 | Full analytics, no cookies, GDPR compliant |
| Umami Cloud | $0-$20 | $0-$240 | Privacy analytics with generous free tier |
| Matomo Cloud | $23+ | $276+ | Full GA-parity with heatmaps and recordings |
| PostHog Cloud | $0 (1M events free) | $0-variable | Product analytics, session replay, feature flags |
| Any tool (self-hosted) | $20-$80 server | $240-$960 | Full control, unlimited data, no per-pageview fees |
Self-hosting on a $20-$40/month VPS gives you unlimited pageviews, full data ownership, and zero per-event pricing.
Migration Tips
Moving from Google Analytics 4
-
Run both in parallel for 2-4 weeks. Install your new tool alongside GA4. Expect 20-40% more traffic in the self-hosted tool -- that's your real traffic that ad blockers were hiding.
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Start with Plausible or Umami. Both install in under 30 minutes with a single script tag. No configuration wizards or consent setup needed.
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Map your GA4 custom events. Recreate them in your new tool. All five tools support custom event tracking via JavaScript API calls.
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Export GA4 historical data. Use BigQuery export or the GA4 Data API before removing GA4. You'll need this for year-over-year comparisons.
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Remove GA4 last. Once your new tool captures everything, remove the GA4 tag. Page load improves by 45-75 KB of JavaScript.
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Update your privacy policy. With cookieless tools, you can remove consent banners entirely in the EU.
What to Expect
| Tool | Migration Difficulty | Time to First Data | Custom Event Setup |
|---|---|---|---|
| Plausible | Easy -- single script tag | 5 minutes | Simple JS API |
| Umami | Easy -- single script tag | 5 minutes | Simple JS API |
| Matomo | Moderate -- more configuration options | 30-60 minutes | Tag manager or JS API |
| PostHog | Moderate -- many features to configure | 15-30 minutes | Autocapture + custom events |
| Open Web Analytics | Moderate -- PHP installation | 30-60 minutes | JS API |
Methodology
We evaluated these tools on privacy compliance (GDPR/CCPA readiness, cookie requirements), data accuracy (ad blocker resistance, sampling), feature depth (events, funnels, heatmaps, API access), self-hosting viability (deployment complexity, resource requirements), community health (GitHub activity, release cadence as of March 2026), and total cost of ownership (cloud pricing vs self-hosting costs vs GA4/GA 360).
No payment or sponsorship was accepted from any listed project. Tools were tested via self-hosted Docker deployments and managed cloud instances. Accuracy comparisons were run on production websites with 50K-500K monthly pageviews.
Find Your Alternative
For most websites, Plausible is the right starting point. If you need advanced features, Matomo gives you everything GA4 has. If you're building a product, PostHog replaces your entire analytics stack.
Browse all Google Analytics alternatives on OSSAlt to see detailed feature comparisons, deployment guides, and community reviews -- and take back control of your analytics data.