The best open source web analytics tools in 2026 are OpenPanel (best overall for web + product analytics), PostHog (best all-in-one platform), Plausible (best for simplicity), and Matomo (best Google Analytics replacement). All offer self-hosting, privacy-first tracking, and GDPR compliance.
Open source analytics tools give you what proprietary platforms like Google Analytics can't: complete data ownership, no vendor lock-in, privacy compliance by design, and the ability to self-host for free. Whether you need simple pageview tracking or advanced product analytics with funnels, retention, and session replay — there's an open source solution that fits. If you're specifically looking to replace GA4, see our Google Analytics alternative comparison and migration guide.
Here's a quick comparison of all 9 tools:
| Tool | Type | License | Self-Host | Cloud Pricing (from) | Best For |
|---|---|---|---|---|---|
| OpenPanel | Web + Product | AGPL-3.0 | Free | $2.50/mo | Teams wanting Mixpanel-like analytics, open source |
| PostHog | Product + Web | MIT | Free | $0 + usage | Developers needing analytics + flags + experiments |
| Plausible | Web | AGPL-3.0 | Free | $9/mo | Simple, privacy-first pageview analytics |
| Matomo | Web | GPL-3.0 | Free | €29/mo | Google Analytics replacement with full feature set |
| Fathom | Web | Proprietary | License | $15/mo | Privacy-focused teams wanting zero maintenance |
| Umami | Web | MIT | Free | $0 + usage | Developers wanting lightweight, self-hosted analytics |
| Ackee | Web | MIT | Free | None | Minimalist self-hosted tracking |
| Pirsch | Web | AGPL-3.0 | License | $6/mo | Server-side analytics without JavaScript |
| Swetrix | Web | AGPL-3.0 | Free | $5/mo | Cookieless analytics with performance monitoring |
Now let's dive deep into each tool.
What to Look for in Open Source Analytics
Before picking a tool, consider these key factors:
- Web analytics vs product analytics — Do you just need pageviews and traffic sources, or do you need event tracking, funnels, retention, and user journeys?
- Self-hosted vs cloud — Self-hosting gives you full data control and is often free, but requires server maintenance. Cloud hosting is easier but costs money.
- Privacy and compliance — Does the tool track without cookies? Is it GDPR/CCPA compliant by design?
- Ease of setup — Some tools take minutes to deploy, others need significant DevOps work.
- Community and maintenance — Is the project actively maintained? How large is the community?
- Pricing model — Event-based, pageview-based, or flat fee? How does cost scale with growth?
OpenPanel
Summary
OpenPanel is an open source analytics platform that combines web analytics and product analytics in one tool. Think of it as Mixpanel meets Plausible — you get real-time event tracking, customizable charts, an overview dashboard with instant insights, individual user and session views, funnels, retention analysis, and multiple SDKs. It uses cookieless tracking and is GDPR compliant by design. You can self-host for free or use the Cloud service with a 30-day free trial.
- Homepage: https://openpanel.dev
- GitHub: https://github.com/Openpanel-dev/openpanel
- License: AGPL-3.0
- Rating: 5/5
- Discount: 30% off (first 3 months): Use discount code GOOGLE
Pricing
OpenPanel Cloud has a 30-day free trial with no credit card required. After the trial, you choose the tier matching your monthly event volume. Self-hosting is completely free — you provide your own infrastructure.
| Events per Month | Price (USD/month) |
|---|---|
| Up to 5,000 | $2.50 |
| Up to 10,000 | $5 |
| Up to 100,000 | $20 |
| Up to 250,000 | $30 |
| Up to 500,000 | $50 |
| Up to 1,000,000 | $90 |
| Up to 2,500,000 | $180 |
| Up to 5,000,000 | $250 |
| Up to 10,000,000 | $350 |
| Up to 20,000,000 | $530 |
| Up to 30,000,000 | $680 |
| Up to 40,000,000 | $800 |
| Up to 50,000,000 | $900 |
All Cloud plans include unlimited websites, unlimited dashboards, unlimited team members, email & Discord support, and 5 years of data retention. No add-ons or hidden costs.
Pros
- Open source and self-hostable — you control your data completely
- Combines web and product analytics in one platform (replaces both GA and Mixpanel)
- Real-time tracking and instant insights, no delays
- Cookieless, GDPR/CCPA compliant by design — no consent banners needed
- Generous free trial and straightforward usage-based pricing
- All features included at every tier, no add-ons
Cons
- Cloud costs grow as event volume increases
- Self-hosting requires server setup and maintenance
- Project is newer with a smaller community than Matomo or PostHog
- No built-in session replay or heatmaps (yet)
FAQ
Alternative to OpenPanel
Plausible Analytics
- Open source, privacy-focused web analytics with flat pricing
- Lightweight, cookieless tracking and simple dashboards
- Predictable monthly cost starting at $9 for 10,000 pageviews
- Ideal if you need core web metrics without product analytics
PostHog
See our detailed comparison: OpenPanel vs PostHog
Summary
PostHog is an open source platform for product analytics, session replay, feature flags, A/B testing, error tracking, and surveys — all in one place. It's developer-focused and offers both self-hosting and a generous cloud free tier. If you need a Swiss Army knife for product development, PostHog is a strong choice.
- Homepage: https://posthog.com
- GitHub: https://github.com/PostHog/posthog
- License: MIT
- Rating: 4/5
Pricing
PostHog offers a generous free tier with 1 million analytics events per month, plus 5,000 session recordings, 1M feature flag requests, and more. Beyond the free limits, pricing uses volume-based step-down rates:
| Monthly Events | Cost per Event | Example Monthly Cost |
|---|---|---|
| First 1M | Free | $0 |
| 1-2M | $0.00005 | ~$50 |
| 2-15M | $0.0000343 | ~$396 (at 12M) |
| 15-50M | $0.0000295 | Declining rate |
| 50-100M | $0.0000218 | Declining rate |
| 100-250M | $0.000015 | Declining rate |
Anonymous events are 55-80% cheaper than identified events, which can significantly reduce costs.
Pros
- Open source and self-host friendly — you keep full data control
- All-in-one suite: analytics, replays, flags, experiments, errors, surveys
- Generous monthly free tier for smaller projects
- Strong developer community and active development
Cons
- Usage-based pricing can be hard to predict as you grow
- Managing a self-hosted instance takes significant ops work
- Self-hosting vs cloud is not feature-equivalent
- Complexity — the sheer number of features can be overwhelming
FAQ
Plausible
See our detailed comparison: OpenPanel vs Plausible
Summary
Plausible is an open source, privacy-friendly web analytics tool built as a lightweight alternative to Google Analytics. It tracks pageviews and custom events without cookies or personal data. You get real-time reports, goals, custom events, email/Slack reports, and GDPR/CCPA compliance out of the box. It's the go-to choice if you want simple, clean analytics without complexity.
- Homepage: https://plausible.io
- GitHub: https://github.com/plausible/analytics
- License: AGPL v3
- Rating: 4/5
Pricing
Plausible uses traffic-based plans billed monthly or yearly (2 months free on annual). All plans include unlimited data retention, unlimited team members, Google Analytics import, and all core features.
| Plan | Pageviews per Month | Price (Monthly) | Price (Yearly) | Sites | Data Retention |
|---|---|---|---|---|---|
| Starter | Up to 10,000 | $9 | $90 | 1 | Unlimited |
| Growth | Up to 100,000 | $14 | $140 | 3 | Unlimited |
| Business | Up to 200,000 | $19 | $190 | 10 | Unlimited |
| Enterprise | 200,001+ | Custom | Custom | 10+ | Unlimited |
Pros
- Designed for privacy — no cookies, no personal data tracking
- Simple, intuitive dashboard that anyone can understand
- Open source with free self-host option and transparent pricing
- Very lightweight script (~1 KB) that doesn't slow your site
Cons
- No free tier beyond self-hosting
- Costs can rise quickly as traffic grows
- No product analytics features (no funnels, retention, or user-level tracking)
- No session replay or heatmaps
FAQ
Alternative to Plausible
Umami
- Umami is almost a 1-to-1 alternative to Plausible with an MIT license
- Free cloud tier with 1M events/month
OpenPanel
- Similar to both Umami and Plausible but also adds product analytics to the mix
Matomo
See our detailed comparison: OpenPanel vs Matomo
Summary
Matomo (formerly Piwik) is the most established open source web analytics platform. It's been around since 2007 and positions itself as the leading Google Analytics alternative. You can track web and mobile visits, build charts, create dashboards, set goals, run A/B tests, record sessions, view heatmaps, and more. You own all your data and can choose to self-host for free or use Matomo Cloud.
- Homepage: https://matomo.org
- GitHub: https://github.com/matomo-org/matomo
- License: GNU GPL v3
- Rating: 4/5
Pricing
| Plan | Price | Hits per Month | Support | Websites | Data Retention |
|---|---|---|---|---|---|
| On-Premise | €0 | Unlimited | Free community support or paid subscriptions | Unlimited | Forever |
| Cloud (50K) | €29/month or €290/year | Up to 50,000 | Email support & Customer Success Manager | 30 | 24 months |
For higher volumes (100K, 300K, 1M+ hits), contact sales for enterprise pricing.
Pros
- Most mature open source analytics platform (since 2007)
- Full data ownership and GDPR/CCPA compliance
- Rich feature set: dashboards, A/B tests, heatmaps, session recordings, funnels
- Free self-hosted option with no limits on hits or users
- Large plugin ecosystem
Cons
- Self-hosting requires server setup, maintenance, and PHP knowledge
- Cloud costs rise sharply beyond the base 50K tier
- Many advanced plugins (A/B testing, heatmaps, etc.) require paid subscriptions even on self-hosted
- UI can feel dated compared to newer tools
FAQ
Alternative to Matomo
Fathom Analytics
- Privacy-focused, simple analytics with no cookies or personal data
- Flat monthly pricing (starts at $15/month) for unlimited sites
- Easy setup with minimal interface for core metrics
Fathom
See our detailed comparison: OpenPanel vs Fathom
Summary
Fathom is a privacy-focused web analytics tool that tracks pageviews and events without cookies or personal data. You get real-time reports, unlimited data retention, unlimited sites, and simple dashboards. While Fathom isn't truly open source (it's proprietary with a self-host license available), it's included here because it's a popular alternative in the privacy-first analytics space.
- Homepage: https://usefathom.com
- GitHub: No public repository (proprietary)
- License: Proprietary (self-host license available)
- Rating: 4/5
Pricing
Fathom bills by monthly data points (pageviews + events). All plans include unlimited sites, data retention, email reports, exports, and support.
| Plan | Data Points / Month | Price (Monthly) | Price (Yearly, 17% off) |
|---|---|---|---|
| Starter | Up to 100,000 | $15 | $150/yr |
| Growth | Up to 200,000 | $25 | $250/yr |
| Business | Up to 500,000 | $45 | $450/yr |
| Scale | Up to 1,000,000 | $60 | $600/yr |
| Scale+ | Up to 2,000,000 | $100 | $1,000/yr |
| Enterprise Small | Up to 5,000,000 | $140 | $1,400/yr |
| Enterprise Medium | Up to 10,000,000 | $200 | $2,000/yr |
| Enterprise Large | Up to 15,000,000 | $290 | $2,900/yr |
| Enterprise X-Large | Up to 20,000,000 | $380 | $3,800/yr |
| Enterprise Custom | Over 25,000,000 | Contact sales | Contact sales |
Pros
- No cookies or personal data collection by design
- Real-time, simple dashboard with core metrics
- Unlimited sites and data retention on every plan
- EU-isolation option available for GDPR compliance
Cons
- Not open source — proprietary platform with no public code
- Costs rise linearly as traffic grows
- No product analytics features (no funnels, retention, or user tracking)
- No session replay or heatmaps
FAQ
Alternative to Fathom
Simple Analytics
- Privacy-first, cookie-free analytics under a flat fee model
- Tracks pageviews only with a focus on simplicity
- No free tier but predictable pricing by site count
- Clean dashboard and easy setup with no code changes
Umami
See our detailed comparison: OpenPanel vs Umami
Summary
Umami is an open source, privacy-friendly web analytics tool. It tracks pageviews and basic events without cookies or personal data. The lightweight script (~2 KB) loads fast and is GDPR/CCPA compliant by default. It's one of the simplest open source analytics tools to self-host, making it popular with developers who want a quick Google Analytics replacement.
- Homepage: https://umami.is
- GitHub: https://github.com/umami-software/umami
- License: MIT
- Rating: 4/5
Pricing
Self-hosted Umami is free with unlimited sites and events, managed by you with community support.
Umami Cloud is free for the first 1 million events per month. Beyond that, you pay $0.00002 per additional event.
| Plan | Price | Monthly Free Limits | Support | Retention |
|---|---|---|---|---|
| Self-host | $0 | Unlimited events & sites | Community forum | Unlimited |
| Cloud | $0 + $0.00002 per event over 1M | 1,000,000 events | Email support | 5 years |
Pros
- Fully open source (MIT) and self-hosted option gives you complete data control
- Privacy-first design with no cookies or personal data collection
- Very lightweight tracking script that won't slow your site
- Simple to self-host with Docker Compose
Cons
- Limited to basic web metrics; no product analytics, session replay, or heatmaps
- Running your own server means maintenance and updates
- Cloud costs can add up at high event volumes
- Fewer advanced features compared to OpenPanel or PostHog
FAQ
Alternative to Umami
GoatCounter
- Open source, privacy-focused analytics with simple pageview and event tracking
- Self-host for free or use hosted plans starting at €5/month
- Lightweight script, no cookies required, GDPR compliant
- Very simple setup and predictable flat pricing
Ackee
See our detailed comparison: OpenPanel vs Ackee
Summary
Ackee is an open source, self-hosted web analytics tool that focuses on privacy and minimalism. It runs on your own server with Node.js and MongoDB, tracks pageviews and custom events without cookies or personal data, and presents stats in a minimal interface. It uses a GraphQL API and keeps all tracked data anonymized by default.
- Homepage: https://ackee.electerious.com
- GitHub: https://github.com/electerious/Ackee
- License: MIT
- Rating: 4/5
Pricing
Ackee is completely free to self-host. You download the code, run it on your server, and there are no limits on sites, pageviews, team members, or data retention.
Note: There is no official Ackee-hosted service. Some third-party providers (like Elestio) offer managed Ackee hosting, but pricing varies by provider.
Pros
- Fully open source and free to self-host — you control all your data
- Privacy-first design: no cookies, anonymized tracking, GDPR/CCPA compliant
- Lightweight and minimal UI with fast load times
- GraphQL API allows custom integrations and flexible querying
Cons
- Limited to basic metrics (no funnels, session replay, or heatmaps)
- Requires server setup, maintenance, and security updates
- No official hosted offering — managed hosting depends on third parties
- Minimal feature set won't suit teams needing advanced analytics
- Requires MongoDB, which adds complexity
FAQ
Alternative to Ackee
GoatCounter
- Open source and privacy-focused, with GDPR-compliant, cookieless tracking
- Self-host free or use hosted plans starting at €5/month
- Simple pageview and basic event metrics, predictable flat pricing
Pirsch
See our detailed comparison: OpenPanel vs Pirsch
Summary
Pirsch is a server-side, cookieless, privacy-focused web analytics solution built in Go. It generates anonymized visitor fingerprints, works even with ad blockers, and is GDPR, CCPA, and PECR compliant. The server-side approach means the tracking isn't affected by client-side blockers — a unique advantage.
- Homepage: https://pirsch.io
- GitHub: https://github.com/pirsch-analytics/pirsch
- License: AGPL-3.0
- Rating: 4/5
Pricing
Pirsch offers a 30-day free trial with no credit card required. After that, plans are usage-based on monthly pageviews:
| Plan | Monthly Price | Annual Price | Pageviews Included | Websites |
|---|---|---|---|---|
| Standard | $6 | $60 | Up to 10,000 | Up to 50 |
| Plus | $12 | $120 | Custom | Unlimited |
| Enterprise | Custom | Custom | Custom | Custom |
Plus plan adds funnels, A/B testing, custom domains/themes, white-labeling, priority support, and event goals.
Pros
- Server-side tracking works around ad blockers — get more complete data
- Privacy-focused with no cookies and anonymized data by default
- Lightweight Go library and multiple SDKs (JS, PHP, Laravel, etc.)
- Hosted in the EU on German servers (Hetzner)
Cons
- Self-hosting requires an enterprise license (not free)
- Usage tiers can get costly as traffic grows
- No session replay or heatmaps
- Smaller community compared to Plausible or Matomo
FAQ
Alternative to Pirsch
Plausible Analytics
- Open source, cookieless web analytics with a flat pricing model
- Simple dashboard, real-time data, and GDPR/CCPA compliance
- Self-host for free or use hosted plans starting at $9/month for 10,000 pageviews
Swetrix
Summary
Swetrix is an open source, cookieless web analytics platform that focuses on privacy and ease of use. You can track pageviews, custom events, user flows, performance metrics, and more — all without cookie banners. It also includes web performance monitoring, which most other tools in this list don't offer.
- Homepage: https://swetrix.com
- GitHub: https://github.com/Swetrix/swetrix
- License: AGPL-3.0
- Rating: 4/5
Pricing
Swetrix offers a 14-day free trial with no credit card required. After that, you pick a plan based on monthly events:
| Plan | Events per Month | Price (USD/month) |
|---|---|---|
| Basic | Up to 10,000 | $5 |
| Growth | Up to 100,000 | $15 |
| Pro | Up to 200,000 | $25 |
| Business | Up to 500,000 | $45 |
| Premium | Up to 1,000,000 | $59 |
| Enterprise Small | Up to 2,000,000 | $84 |
| Enterprise Medium | Up to 5,000,000 | $110 |
| Enterprise Large | Up to 10,000,000 | $150 |
| Enterprise X-Large | Over 10,000,000 | Contact sales |
Pros
- Fully open source and self-hostable for complete data control
- Cookieless tracking that is GDPR/CCPA compliant by design
- Includes web performance monitoring (page load times, Core Web Vitals)
- Clean, simple dashboard with user flows, alerts, and exports
Cons
- Hosted plans use usage-based tiers, so costs rise with traffic
- Self-hosting requires setup, maintenance, and hosting infrastructure
- No session replay or heatmaps
- Smaller community compared to more established tools
FAQ
Alternative to Swetrix
Plausible Analytics
- Open source, privacy-first web analytics with flat pricing
- Tracks pageviews and goals with no cookies required
- Self-host for free or start hosted plans at $9/month for 10,000 pageviews
- Simple setup and predictable costs
Pricing Comparison: All 9 Tools at a Glance
Here's how the cloud/hosted pricing compares across all tools at common event volumes:
| Monthly Events | OpenPanel | PostHog | Plausible | Matomo Cloud | Fathom | Umami Cloud | Pirsch | Swetrix |
|---|---|---|---|---|---|---|---|---|
| 10K | $5 | $0 | $9 | €29 | $15 | $0 | $6 | $5 |
| 100K | $20 | $0 | $14 | €29 | $15 | $0 | ~$12+ | $15 |
| 500K | $50 | $0 | ~$19+ | Custom | $45 | $0 | Custom | $45 |
| 1M | $90 | $0 | Custom | Custom | $60 | $0 | Custom | $59 |
| 5M | $250 | ~$187 | Custom | Custom | $140 | ~$80 | Custom | $110 |
| 10M | $350 | ~$393 | Custom | Custom | $200 | ~$180 | Custom | $150 |
PostHog and Umami include 1M free events/month. Plausible prices by pageviews, not events. Matomo prices by "hits." Exact pricing varies — check each provider for current rates.
How to Choose the Right Open Source Analytics Tool
Choose OpenPanel if you want the power of product analytics (funnels, retention, user tracking) combined with web analytics, at an affordable price. Best for startups and growing companies.
Choose PostHog if you need an all-in-one developer platform with analytics, feature flags, experiments, error tracking, and surveys. Best for engineering-heavy teams.
Choose Plausible if you want the simplest possible privacy-first web analytics. No complexity, just clean traffic data. Best for blogs, marketing sites, and simple web projects.
Choose Matomo if you need a mature, full-featured Google Analytics replacement with heatmaps, session recordings, and A/B testing. Best for enterprises moving away from GA4. See our full Google Analytics alternative comparison for a detailed breakdown.
Choose Umami if you want a lightweight, MIT-licensed tool to self-host with minimal setup. Best for developers who want basic analytics on personal projects.
Choose Fathom if you want simple privacy analytics without any self-hosting. Best for businesses that want zero maintenance.
Choose Pirsch if you need server-side tracking that works around ad blockers. Best for sites where tracking accuracy is critical.
Choose Swetrix if you want web analytics plus performance monitoring in one tool. Best for teams focused on web performance.
Choose Ackee if you want the most minimal self-hosted solution possible. Best for personal projects or developers who want maximum simplicity.
