Best Open Source Alternatives to PostHog in 2026
PostHog Is Great — Until You Scale
PostHog gives you the first 1 million events per month free on their cloud. That's generous. But past that, it scales at $0.00005 per event. A startup with 5-10 million monthly events pays $150-400/month. At 100 million events, cloud costs reach $500-800/month.
PostHog is itself open source and can be self-hosted — but running PostHog at scale requires serious infrastructure. The recommended self-hosted deployment uses Kubernetes with multiple services, ClickHouse for data storage, and Redis. At high event volumes, self-hosting PostHog replaces the cloud bill with a substantial infrastructure bill.
And PostHog is a comprehensive product analytics platform — feature flags, session recording, A/B testing, heatmaps, funnels, retention — which means it's also more than many teams actually need.
If you need simpler analytics without the operational complexity, open source alternatives like Plausible, Umami, Matomo, and OpenPanel may be a better fit.
TL;DR
- Plausible (21K+ stars): Best for simple, privacy-first web analytics. Clean UI, 2KB script, GDPR-compliant by default. For websites and marketing pages.
- Umami (24K+ stars): Best balance of simplicity and features. Lightweight, multi-site, event tracking without cookies.
- Matomo (20K+ stars): Best Google Analytics replacement with the most features. 100M+ Docker pulls. For teams migrating from GA with complex requirements.
- OpenPanel: Best for product analytics without PostHog's complexity. Feature flags, funnels, and event tracking in a lightweight package.
- GrowthBook: Best for A/B testing and feature flags specifically.
Quick Comparison
| Tool | GitHub Stars | Docker Pulls | Best For | Self-Hosting Ease | License |
|---|---|---|---|---|---|
| Plausible | 21K+ | 5M+ | Simple web analytics | Easy | AGPL-3.0 |
| Umami | 24K+ | 5M+ | Multi-site, lightweight | Easy | MIT |
| Matomo | 20K+ | 100M+ | GA replacement, ecommerce | Medium | GPL-3.0 |
| OpenPanel | 5K+ | Low | Product analytics | Easy | Apache 2.0 |
| GrowthBook | 6K+ | Low | A/B testing, feature flags | Medium | MIT |
Plausible — Best for Simple Privacy-First Analytics
Plausible is the go-to choice when you want clean analytics without complexity. The script is 2KB (vs Google Analytics at 45KB), loads fast, doesn't use cookies, and requires no consent banner in the EU.
What Makes It Stand Out
Privacy by design: No personal data collected, no cookies, no cross-site tracking. Compliant with GDPR, CCPA, and PECR out of the box. Your visitors aren't tracked across the web.
Clean interface: The dashboard shows what matters — unique visitors, pageviews, bounce rate, sources, pages, and devices. Everything on one screen, no configuration required.
Lightweight: The 2KB tracker script has measurably less impact on page load times than Google Analytics. For sites where performance matters, this is meaningful.
Custom events: Track button clicks, form submissions, and user actions with simple JavaScript:
plausible('Sign up', {props: {plan: 'pro'}})
Public dashboards: Share your analytics publicly (useful for open source projects and transparency-focused businesses).
Self-Hosting
git clone https://github.com/plausible/community-edition
cd community-edition
cp plausible-conf.env.example plausible-conf.env
# Set SECRET_KEY_BASE and BASE_URL
docker compose up -d
Plausible Community Edition runs as two Docker containers (app + PostgreSQL + ClickHouse). It's genuinely simple to deploy and maintain.
Limitations: Community Edition lacks some cloud features (email reports, some integrations). No session recording, heatmaps, or feature flags — it's analytics only.
Best for: Blogs, marketing websites, and SaaS apps that want privacy-first traffic analytics without complexity.
Umami — Best Balance of Features and Simplicity
Umami is a close competitor to Plausible. It's similarly lightweight and privacy-first, but with a different architecture (single-container, Node.js vs Plausible's Elixir/ClickHouse stack) and a few additional capabilities.
What Makes It Stand Out
Single container deployment: Umami runs as one Node.js process with SQLite or PostgreSQL. The simplest self-hosting setup of any analytics tool:
docker run -d \
-p 3000:3000 \
-e DATABASE_URL=postgresql://user:pass@postgres/umami \
ghcr.io/umami-software/umami:postgresql-latest
Multi-site in one instance: Manage analytics for unlimited websites from one Umami deployment. Each site gets its own script and dashboard.
Team access: Share dashboards with team members or clients with password-protected access.
Real-time data: Live view of current visitors — useful for watching launches, announcements, and campaigns.
Custom events: Track any user interaction with a data-* HTML attribute approach (no JavaScript required for basic events).
Free cloud tier: Umami Cloud offers 3 sites and 100K events/month free — useful if you want managed hosting without self-hosting complexity.
Best for: Developers running multiple websites who want simple, privacy-first analytics with multi-site management from one dashboard.
Matomo — Most Complete GA Replacement
Matomo (formerly Piwik) is the most comprehensive open source analytics platform. With 100 million+ Docker pulls, it's the most widely deployed self-hosted analytics tool in the world.
What Makes It Stand Out
Full Google Analytics parity: Matomo implements essentially every GA4 feature — sessions, goals, e-commerce tracking, funnel analysis, cohort reports, attribution modeling, segments, and custom reports.
E-commerce integration: Native plugins for WooCommerce, Shopify, Magento, and other platforms. Revenue tracking, cart abandonment, and multi-channel attribution.
Tag Manager: Built-in tag manager (like GTM) for managing tracking without code changes.
Heatmaps and session recordings: See how visitors interact with pages — available as paid plugins in the self-hosted version or included in some plans.
GDPR Manager: Built-in tools for consent management, data subject requests, and compliance reporting.
100% data ownership: Unlike PostHog's cloud or Google Analytics, all Matomo data stays on your infrastructure. This is the explicit value proposition.
Self-Hosting
Matomo runs as a PHP application:
docker run -d \
-p 80:80 \
-v matomo:/var/www/html \
-e MYSQL_HOST=db \
matomo
Requires MySQL/MariaDB. The installation wizard guides you through configuration.
Limitations: The default interface can feel dated compared to PostHog or Plausible. Performance degrades with very high event volumes unless you optimize MySQL or migrate to a proper OLAP backend.
Best for: Teams migrating from Google Analytics who need feature parity, e-commerce tracking, and full data ownership.
OpenPanel — Best Lightweight Product Analytics
OpenPanel is a newer tool specifically designed to provide product analytics (like PostHog or Mixpanel) without the infrastructure overhead. It tracks user journeys, funnels, retention, and custom events — not just page views.
What Makes It Stand Out
Product analytics focus: Track user actions within your application, not just traffic. Define events like "upgraded plan," "invited team member," or "exported report" and build funnels.
Session analytics: See how users progress through your product — where they drop off, what features they use.
Simple deployment: Single Docker container, much lighter than PostHog's Kubernetes-recommended stack.
OpenTelemetry compatible: Works with standard observability infrastructure.
Best for: SaaS products that need product analytics (event tracking, funnels, retention) without PostHog's infrastructure complexity.
GrowthBook — Best for A/B Testing and Feature Flags
If PostHog's feature flags and A/B testing capabilities are what you actually need (rather than the full analytics stack), GrowthBook is the focused alternative.
What Makes It Stand Out
Pure experimentation platform: Feature flags, A/B testing, and experiment analysis — that's the entire product. No analytics overhead.
Statistical rigor: GrowthBook uses Bayesian and frequentist statistics with proper experiment analysis. Better than basic A/B testing implementations.
SDK breadth: JavaScript, Python, Ruby, Go, PHP, iOS, Android, Flutter SDKs.
Open source with cloud: Self-hosted forever-free tier, and a managed cloud plan for teams who don't want infrastructure management.
Best for: Engineering teams building experimentation platforms who need rigorous A/B testing without the PostHog full-stack.
Cost Comparison: PostHog Cloud vs Self-Hosted Alternatives
PostHog Cloud (Monthly Events)
| Events/Month | Monthly Cost |
|---|---|
| 1M (free tier) | $0 |
| 5M | ~$200 |
| 10M | ~$360 |
| 50M | ~$1,090 |
| 100M | ~$1,635 |
Self-Hosted Alternatives
| Tool + Infra | Server | Monthly Total |
|---|---|---|
| Plausible CE (Hetzner CAX11) | $4/month | $4 |
| Umami (Hetzner CPX11) | $4/month | $4 |
| Matomo (Hetzner CPX21) | $6.50/month | $6.50 |
| OpenPanel (Hetzner CPX21) | $6.50/month | $6.50 |
For teams with 5-100M monthly events, self-hosting saves $200-1,600+/month vs PostHog cloud.
The trade-off is infrastructure management — patches, backups, monitoring. For a single VPS running Plausible or Umami, this is maybe 1-2 hours/month. For a complex Matomo deployment at scale, more.
Choosing Between Them
You need simple traffic analytics → Plausible or Umami
You're migrating from Google Analytics → Matomo (most feature-complete GA replacement)
You need product analytics (events, funnels, retention) → OpenPanel or self-hosted PostHog
You need A/B testing and feature flags → GrowthBook
You need PostHog's full feature set and have the infrastructure budget → Self-host PostHog on dedicated infrastructure
Find Your Analytics Tool
Browse all PostHog and Google Analytics alternatives on OSSAlt — compare Plausible, Umami, Matomo, OpenPanel, and every other open source analytics tool with deployment guides and feature comparisons.